Index: binaries/data/mods/mod/autostart/entrypoint.js
===================================================================
--- /dev/null
+++ binaries/data/mods/mod/autostart/entrypoint.js
@@ -0,0 +1,23 @@
+/**
+ * This file is called from the visual & non-visual paths when autostarting.
+ * To avoid relying on the GUI, this script has access to a special 'LoadScript' function.
+ * See implementation in the public mod for more details.
+ */
+
+function autostartClient(initData)
+{
+	error("Autostart is not implemented in the 'mod' mod");
+}
+
+function autostartHost(initData, networked = false)
+{
+	error("Autostart is not implemented in the 'mod' mod");
+}
+
+/**
+ * @returns false if the loop should carry on.
+ */
+function onTick()
+{
+	return true;
+}
Index: binaries/data/mods/public/autostart/autostart.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/autostart/autostart.js
@@ -0,0 +1,29 @@
+class AutoStart
+{
+	constructor(initData)
+	{
+		this.settings = new GameSettings().init();
+		this.settings.fromInitAttributes(initData.attribs);
+
+		this.playerAssignments = initData.playerAssignments;
+
+		this.settings.launchGame(this.playerAssignments, initData.storeReplay);
+
+		this.onLaunch();
+	}
+
+	onTick()
+	{
+	}
+
+	/**
+	 * In the visual autostart path, we need to show the loading screen.
+	 */
+	onLaunch()
+	{
+		Engine.SwitchGuiPage("page_loading.xml", {
+			"attribs": this.settings.finalizedAttributes,
+			"playerAssignments": this.playerAssignments
+		});
+	}
+}
Index: binaries/data/mods/public/autostart/autostart_client.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/autostart/autostart_client.js
@@ -0,0 +1,54 @@
+class AutoStartClient
+{
+	constructor(initData)
+	{
+		this.playerAssignments = {};
+
+		try
+		{
+			Engine.StartNetworkJoin(initData.playerName, initData.ip, initData.port, initData.storeReplay);
+		}
+		catch (e)
+		{
+			const message = sprintf(translate("Cannot join game: %(message)s."), { "message": e.message });
+			messageBox(400, 200, message, translate("Error"));
+		}
+	}
+
+	onTick()
+	{
+		while (true)
+		{
+			const message = Engine.PollNetworkClient();
+			if (!message)
+				break;
+
+			switch (message.type)
+			{
+			case "players":
+				this.playerAssignments = message.newAssignments;
+				Engine.SendNetworkReady(2);
+				break;
+			case "start":
+				this.onLaunch(message);
+				// Process further pending netmessages in the session page.
+				return true;
+			default:
+			}
+		}
+		return false;
+	}
+
+	/**
+	 * In the visual autostart path, we need to show the loading screen.
+	 * Overload this as appropriate, the default implementation works for the public mod.
+	 */
+	onLaunch(message)
+	{
+		Engine.SwitchGuiPage("page_loading.xml", {
+			"attribs": message.initAttributes,
+			"isRejoining": true,
+			"playerAssignments": this.playerAssignments
+		});
+	}
+}
Index: binaries/data/mods/public/autostart/autostart_host.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/autostart/autostart_host.js
@@ -0,0 +1,85 @@
+class AutoStartHost
+{
+	constructor(initData)
+	{
+		this.launched = false;
+		this.maxPlayers = initData.maxPlayers;
+		this.storeReplay = initData.storeReplay;
+		this.playerAssignments = {};
+
+		this.initAttribs = initData.attribs;
+
+		try
+		{
+			// Stun and password not implemented for autostart.
+			Engine.StartNetworkHost(initData.playerName, initData.port, false, "", initData.storeReplay);
+		}
+		catch (e)
+		{
+			const message = sprintf(translate("Cannot host game: %(message)s."), { "message": e.message });
+			messageBox(400, 200, message, translate("Error"));
+		}
+	}
+
+	/**
+	 * Handles a simple implementation of player assignments.
+	 * Should not need be overloaded in mods unless you want to change that logic.
+	 */
+	onTick()
+	{
+		while (true)
+		{
+			const message = Engine.PollNetworkClient();
+			if (!message)
+				break;
+
+			switch (message.type)
+			{
+			case "players":
+				this.playerAssignments = message.newAssignments;
+				Engine.SendNetworkReady(2);
+				let max = 0;
+				for (const uid in this.playerAssignments)
+				{
+					max = Math.max(this.playerAssignments[uid].player, max);
+					if (this.playerAssignments[uid].player == -1)
+						Engine.AssignNetworkPlayer(++max, uid);
+				}
+				break;
+			case "ready":
+				this.playerAssignments[message.guid].status = message.status;
+				break;
+			case "start":
+				return true;
+			default:
+			}
+		}
+
+		if (!this.launched && Object.keys(this.playerAssignments).length == this.maxPlayers)
+		{
+			for (const uid in this.playerAssignments)
+				if (this.playerAssignments[uid].player == -1 || this.playerAssignments[uid].status == 0)
+					return false;
+			this.onLaunch();
+		}
+		return false;
+	}
+
+	/**
+	 * In the visual autostart path, we need to show the loading screen.
+	 * Overload this as appropriate.
+	 */
+	onLaunch()
+	{
+		this.launched = true;
+
+		this.settings = new GameSettings().init();
+		this.settings.fromInitAttributes(this.initAttribs);
+		this.settings.playerCount.setNb(Object.keys(this.playerAssignments).length);
+		this.settings.launchGame(this.playerAssignments, this.storeReplay);
+		Engine.SwitchGuiPage("page_loading.xml", {
+			"attribs": this.initAttribs,
+			"playerAssignments": this.playerAssignments
+		});
+	}
+}
Index: binaries/data/mods/public/autostart/entrypoint.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/autostart/entrypoint.js
@@ -0,0 +1,60 @@
+/**
+ * Implement autostart for the public mod.
+ * We want to avoid relying on too many specific files, so we'll mock a few engine functions.
+ * Depending on the path, these may get overwritten with the real function.
+ */
+
+Engine.HasNetClient = () => false;
+Engine.HasXmppClient = () => false;
+Engine.GetMatchID = () => 0;
+Engine.SetRankedGame = () => {};
+Engine.TextureExists = () => false;
+Engine.PushGuiPage = () => {};
+Engine.SwitchGuiPage = () => {};
+
+var translateObjectKeys = () => {}
+var translate = x => x;
+var translateWithContext = x => x;
+
+// MsgBox is used in the failure path.
+// TODO: clean this up and show errors better in the non-visual path.
+Engine.LoadScript("gui/common/functions_msgbox.js");
+
+var autostartInstance;
+
+function autostartClient(initData)
+{
+	autostartInstance = new AutoStartClient(initData);
+}
+
+/**
+ * This path depends on files currently stored under gui/, which should be moved.
+ * The best place would probably be a new 'engine' mod, independent from the 'mod' mod and the public mod.
+ */
+function autostartHost(initData, networked = false)
+{
+	Engine.LoadScript("globalscripts/");
+
+	Engine.LoadScript("gui/common/color.js");
+	Engine.LoadScript("gui/common/functions_utility.js");
+	Engine.LoadScript("gui/common/Observable.js");
+	Engine.LoadScript("gui/common/settings.js");
+
+	Engine.LoadScript("gui/maps/MapCache.js")
+
+	Engine.LoadScript("gamesettings/");
+	Engine.LoadScript("gamesettings/attributes/");
+
+	if (networked)
+		autostartInstance = new AutoStartHost(initData);
+	else
+		autostartInstance = new AutoStart(initData);
+}
+
+/**
+ * @returns false if the loop should carry on.
+ */
+function onTick()
+{
+	return autostartInstance.onTick();
+}
Index: binaries/data/mods/public/gamesettings/GameSettings.js
===================================================================
--- binaries/data/mods/public/gamesettings/GameSettings.js
+++ binaries/data/mods/public/gamesettings/GameSettings.js
@@ -11,7 +11,7 @@
  */
 class GameSettings
 {
-	init(mapCache)
+	init(mapCache, civData)
 	{
 		if (!mapCache)
 			mapCache = new MapCache();
@@ -19,9 +19,11 @@
 			"value": mapCache,
 		});
 
-		// Load all possible civ data - don't presume that some will be available.
+		if (!civData)
+			// Load all possible civ data - don't presume that some will be available.
+			civData = loadCivData(false, false);
 		Object.defineProperty(this, "civData", {
-			"value": loadCivData(false, false),
+			"value": civData
 		});
 
 		Object.defineProperty(this, "isNetworked", {
Index: binaries/data/mods/public/globalscripts/Civilisations.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/globalscripts/Civilisations.js
@@ -0,0 +1,49 @@
+/**
+ * Loads history and gameplay data of all civs.
+ *
+ * @param selectableOnly {boolean} - Only load civs that can be selected
+ *        in the gamesetup. Scenario maps might set non-selectable civs.
+ */
+function loadCivFiles(selectableOnly)
+{
+	let propertyNames = [
+		"Code", "Culture", "Music", "CivBonuses", "StartEntities",
+		"AINames", "SkirmishReplacements", "SelectableInGameSetup"];
+
+	let civData = {};
+
+	for (let filename of Engine.ListDirectoryFiles("simulation/data/civs/", "*.json", false))
+	{
+		let data = Engine.ReadJSONFile(filename);
+
+		for (let prop of propertyNames)
+			if (data[prop] === undefined)
+				throw new Error(filename + " doesn't contain " + prop);
+
+		if (selectableOnly && !data.SelectableInGameSetup)
+			continue;
+
+		const template = Engine.GetTemplate("special/players/" + data.Code);
+		data.Name = template.Identity.GenericName;
+		data.Emblem = "session/portraits/" + template.Identity.Icon;
+		data.History = template.Identity.History;
+
+		civData[data.Code] = data;
+	}
+
+	return civData;
+}
+
+function getCivCodes(selectableOnly)
+{
+	let codes = [];
+
+	for (let filename of Engine.ListDirectoryFiles("simulation/data/civs/", "*.json", false))
+	{
+		let data = Engine.ReadJSONFile(filename);
+
+		if (selectableOnly && !data.SelectableInGameSetup)
+			continue;
+
+	}
+}
Index: binaries/data/mods/public/gui/autostart/autostart.js
===================================================================
--- binaries/data/mods/public/gui/autostart/autostart.js
+++ binaries/data/mods/public/gui/autostart/autostart.js
@@ -1,12 +1,4 @@
 function init(initData)
 {
-	let settings = new GameSettings().init();
-	settings.fromInitAttributes(initData.attribs);
-
-	settings.launchGame(initData.playerAssignments, initData.storeReplay);
-
-	Engine.SwitchGuiPage("page_loading.xml", {
-		"attribs": settings.finalizedAttributes,
-		"playerAssignments": initData.playerAssignments
-	});
+	return new AutoStart(initData);
 }
Index: binaries/data/mods/public/gui/autostart/autostart.xml
===================================================================
--- binaries/data/mods/public/gui/autostart/autostart.xml
+++ binaries/data/mods/public/gui/autostart/autostart.xml
@@ -2,7 +2,8 @@
 <objects>
 	<script file="gui/maps/MapCache.js"/>
 	<script directory="gui/common/"/>
-	<script directory="gui/gamesettings/"/>
-	<script directory="gui/gamesettings/attributes/"/>
+	<script directory="gamesettings/"/>
+	<script directory="gamesettings/attributes/"/>
+	<script file="autostart/autostart.js"/>
 	<script file="gui/autostart/autostart.js"/>
 </objects>
Index: binaries/data/mods/public/gui/autostart/autostart_client.js
===================================================================
--- binaries/data/mods/public/gui/autostart/autostart_client.js
+++ /dev/null
@@ -1,54 +0,0 @@
-class AutoStartClient
-{
-	constructor(initData)
-	{
-		Engine.GetGUIObjectByName("ticker").onTick = this.onTick.bind(this);
-
-		this.playerAssignments = {};
-
-		try
-		{
-			Engine.StartNetworkJoin(initData.playerName, initData.ip, initData.port, initData.storeReplay);
-		}
-		catch (e)
-		{
-			messageBox(
-				400, 200,
-				sprintf(translate("Cannot join game: %(message)s."), { "message": e.message }),
-				translate("Error")
-			);
-		}
-	}
-
-	onTick()
-	{
-		while (true)
-		{
-			const message = Engine.PollNetworkClient();
-			if (!message)
-				break;
-
-			switch (message.type)
-			{
-			case "players":
-				this.playerAssignments = message.newAssignments;
-				break;
-			case "start":
-				Engine.SwitchGuiPage("page_loading.xml", {
-					"attribs": message.initAttributes,
-					"isRejoining": true,
-					"playerAssignments": this.playerAssignments
-				});
-
-				// Process further pending netmessages in the session page.
-				return;
-			default:
-			}
-		}
-	}
-}
-
-function init(initData)
-{
-	new AutoStartClient(initData);
-}
Index: binaries/data/mods/public/gui/autostart/autostart_client.xml
===================================================================
--- binaries/data/mods/public/gui/autostart/autostart_client.xml
+++ /dev/null
@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<objects>
-	<script directory="gui/common/"/>
-	<script file="gui/autostart/autostart_client.js"/>
-
-	<object name="ticker"/>
-</objects>
Index: binaries/data/mods/public/gui/autostart/autostart_host.js
===================================================================
--- binaries/data/mods/public/gui/autostart/autostart_host.js
+++ /dev/null
@@ -1,61 +0,0 @@
-class AutoStartHost
-{
-	constructor(initData)
-	{
-		this.maxPlayers = initData.maxPlayers;
-		this.storeReplay = initData.storeReplay;
-		this.playerAssignments = {};
-
-		Engine.GetGUIObjectByName("ticker").onTick = this.onTick.bind(this);
-
-		try
-		{
-			// Stun and password not implemented for autostart.
-			Engine.StartNetworkHost(initData.playerName, initData.port, false, "", initData.storeReplay);
-		}
-		catch (e)
-		{
-			messageBox(
-				400, 200,
-				sprintf(translate("Cannot host game: %(message)s."), { "message": e.message }),
-				translate("Error")
-			);
-		}
-
-		this.settings = new GameSettings().init();
-		this.settings.fromInitAttributes(initData.attribs);
-	}
-
-	onTick()
-	{
-		while (true)
-		{
-			const message = Engine.PollNetworkClient();
-			if (!message)
-				break;
-
-			switch (message.type)
-			{
-			case "players":
-				this.playerAssignments = message.newAssignments;
-				break;
-			default:
-			}
-		}
-
-		if (Object.keys(this.playerAssignments).length == this.maxPlayers)
-		{
-			this.settings.launchGame(this.playerAssignments, this.storeReplay);
-
-			Engine.SwitchGuiPage("page_loading.xml", {
-				"attribs": this.settings.finalizedAttributes,
-				"playerAssignments": this.playerAssignments
-			});
-		}
-	}
-}
-
-function init(initData)
-{
-	new AutoStartHost(initData);
-}
Index: binaries/data/mods/public/gui/autostart/autostart_host.xml
===================================================================
--- binaries/data/mods/public/gui/autostart/autostart_host.xml
+++ /dev/null
@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<objects>
-	<script file="gui/maps/MapCache.js"/>
-	<script directory="gui/common/"/>
-	<script directory="gui/gamesettings/"/>
-	<script directory="gui/gamesettings/attributes/"/>
-	<script file="gui/autostart/autostart_host.js"/>
-
-	<object name="ticker"/>
-</objects>
Index: binaries/data/mods/public/gui/campaigns/default_menu/CampaignMenu.xml
===================================================================
--- binaries/data/mods/public/gui/campaigns/default_menu/CampaignMenu.xml
+++ binaries/data/mods/public/gui/campaigns/default_menu/CampaignMenu.xml
@@ -3,8 +3,8 @@
 <objects>
 	<script file="gui/maps/MapCache.js"/>
 	<script directory="gui/common/"/>
-	<script directory="gui/gamesettings/"/>
-	<script directory="gui/gamesettings/attributes/"/>
+	<script directory="gamesettings/"/>
+	<script directory="gamesettings/attributes/"/>
 	<script directory="gui/campaigns/default_menu/"/>
 
 	<object type="image" style="ModernWindow" size="0 0 100% 100%" name="campaignMenuWindow">
Index: binaries/data/mods/public/gui/gamesettings/GameSetting.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/GameSetting.js
@@ -1,36 +0,0 @@
-/**
- * The game settings are split in subclasses that are only responsible
- * for a logical subset of settings.
- * These are observables so updates are automated.
- */
-class GameSetting extends Observable /* ProfilableMixin(Observable) /* Replace to profile automatically. */
-{
-	constructor(settings)
-	{
-		super();
-		this.settings = settings;
-	}
-
-	getDefaultValue(settingsProp, dataProp)
-	{
-		for (let index in g_Settings[settingsProp])
-			if (g_Settings[settingsProp][index].Default)
-				return g_Settings[settingsProp][index][dataProp];
-		return undefined;
-	}
-
-	getLegacySetting(attrib, name)
-	{
-		if (!attrib || !attrib.settings || attrib.settings[name] === undefined)
-			return undefined;
-		return attrib.settings[name];
-	}
-
-	getMapSetting(name)
-	{
-		if (!this.settings.map.data || !this.settings.map.data.settings ||
-			this.settings.map.data.settings[name] === undefined)
-			return undefined;
-		return this.settings.map.data.settings[name];
-	}
-}
Index: binaries/data/mods/public/gui/gamesettings/attributes/Biome.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/Biome.js
@@ -1,91 +0,0 @@
-GameSettings.prototype.Attributes.Biome = class Biome extends GameSetting
-{
-	init()
-	{
-		this.biomes = loadBiomes();
-		this.biomeData = {};
-		for (const biome of this.biomes)
-			this.biomeData[biome.Id] = biome;
-		this.cachedMapData = undefined;
-
-		this.biome = undefined;
-		// NB: random is always available.
-		this.available = new Set();
-
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (!this.biome)
-			return;
-		attribs.settings.Biome = this.biome;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (!this.getLegacySetting(attribs, "Biome"))
-			this.setBiome(undefined);
-		else
-			this.setBiome(this.getLegacySetting(attribs, "Biome"));
-	}
-
-	filterBiome(available)
-	{
-		if (typeof available === "string")
-			return biome => biome.Id.startsWith(available);
-
-		return biome => available.indexOf(biome.Id) !== -1;
-	}
-
-	onMapChange()
-	{
-		const mapData = this.settings.map.data;
-		if (mapData && mapData.settings && mapData.settings.SupportedBiomes !== undefined)
-		{
-			if (mapData.settings.SupportedBiomes === this.cachedMapData)
-				return;
-			this.cachedMapData = mapData.settings.SupportedBiomes;
-			this.available = new Set(this.biomes.filter(this.filterBiome(mapData.settings.SupportedBiomes))
-				.map(biome => biome.Id));
-			this.biome = "random";
-		}
-		else if (this.cachedMapData !== undefined)
-		{
-			this.cachedMapData = undefined;
-			this.available = new Set();
-			this.biome = undefined;
-		}
-	}
-
-	setBiome(biome)
-	{
-		// TODO: more validation.
-		if (this.available.size)
-			this.biome = biome || "random";
-		else
-			this.biome = undefined;
-	}
-
-	getAvailableBiomeData()
-	{
-		return Array.from(this.available).map(biome => this.biomeData[biome]);
-	}
-
-	getData()
-	{
-		if (!this.biome)
-			return undefined;
-		return this.biomeData[this.biome];
-	}
-
-	pickRandomItems()
-	{
-		// If the map is random, we need to wait until it selects to know if we need to pick a biome.
-		if (this.settings.map.map === "random" || this.biome !== "random")
-			return false;
-
-		this.biome = pickRandom(Array.from(this.available));
-		return true;
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/CampaignData.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/CampaignData.js
@@ -1,17 +0,0 @@
-/**
- * Store campaign-related data.
- * This is just a passthrough and makes no assumption about the data.
- */
-GameSettings.prototype.Attributes.CampaignData = class CampaignData extends GameSetting
-{
-	toInitAttributes(attribs)
-	{
-		if (this.value)
-			attribs.campaignData = this.value;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		this.value = attribs.campaignData;
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/Ceasefire.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/Ceasefire.js
@@ -1,36 +0,0 @@
-GameSettings.prototype.Attributes.Ceasefire = class Ceasefire extends GameSetting
-{
-	init()
-	{
-		this.value = 0;
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		attribs.settings.Ceasefire = this.value;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (!this.getLegacySetting(attribs, "Ceasefire"))
-			this.value = 0;
-		else
-			this.value = +this.getLegacySetting(attribs, "Ceasefire");
-	}
-
-	onMapChange()
-	{
-		if (this.settings.map.type != "scenario")
-			return;
-		if (!this.getMapSetting("Ceasefire"))
-			this.value = 0;
-		else
-			this.value = +this.getMapSetting("Ceasefire");
-	}
-
-	setValue(val)
-	{
-		this.value = Math.round(val);
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/Cheats.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/Cheats.js
@@ -1,33 +0,0 @@
-GameSettings.prototype.Attributes.Cheats = class Cheats extends GameSetting
-{
-	init()
-	{
-		this.enabled = false;
-		this.settings.rating.watch(() => this.maybeUpdate(), ["enabled"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		attribs.settings.CheatsEnabled = this.enabled;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		this.enabled = !!this.getLegacySetting(attribs, "CheatsEnabled");
-	}
-
-	_set(enabled)
-	{
-		this.enabled = (enabled && !this.settings.rating.enabled);
-	}
-
-	setEnabled(enabled)
-	{
-		this._set(enabled);
-	}
-
-	maybeUpdate()
-	{
-		this._set(this.enabled);
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/CircularMap.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/CircularMap.js
@@ -1,32 +0,0 @@
-/**
- * This doesn't have a GUI setting.
- */
-GameSettings.prototype.Attributes.CircularMap = class CircularMap extends GameSetting
-{
-	init()
-	{
-		this.value = false;
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		attribs.settings.CircularMap = this.value;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (this.getLegacySetting(attribs, "CircularMap") !== undefined)
-			this.value = !!this.getLegacySetting(attribs, "CircularMap");
-	}
-
-	onMapChange()
-	{
-		this.value = this.getMapSetting("CircularMap") || false;
-	}
-
-	setValue(val)
-	{
-		this.value = val;
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/Daytime.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/Daytime.js
@@ -1,66 +0,0 @@
-GameSettings.prototype.Attributes.Daytime = class Daytime extends GameSetting
-{
-	init()
-	{
-		this.setDataValueHelper(undefined, undefined);
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (this.value)
-			attribs.settings.Daytime = this.value;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (!this.getLegacySetting(attribs, "Daytime"))
-			this.setValue(undefined);
-		else
-			this.setValue(this.getLegacySetting(attribs, "Daytime"));
-	}
-
-	onMapChange()
-	{
-		let mapData = this.settings.map.data;
-		if (!mapData || !mapData.settings || !mapData.settings.Daytime)
-		{
-			this.setDataValueHelper(undefined, undefined);
-			return;
-		}
-		// TODO: validation
-		this.setDataValueHelper(mapData.settings.Daytime, "random");
-	}
-
-	setValue(val)
-	{
-		// TODO: more validation.
-		if (this.data)
-			this.value = val || "random";
-		else
-			this.value = undefined;
-	}
-
-	pickRandomItems()
-	{
-		// If the map is random, we need to wait until it is selected.
-		if (this.settings.map.map === "random" || this.value !== "random")
-			return false;
-
-		this.value = pickRandom(this.data).Id;
-		return true;
-	}
-
-	/**
-	 * Helper function to ensure this.data and this.value
-	 * are assigned in the correct order to prevent
-	 * crashes in the renderer.
-	 * @param {object} data - The day time option data.
-	 * @param {string} value - The option's key.
-	*/
-	setDataValueHelper(data, value)
-	{
-		this.data = data;
-		this.value = value;
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/DisableSpies.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/DisableSpies.js
@@ -1,30 +0,0 @@
-GameSettings.prototype.Attributes.DisableSpies = class DisableSpies extends GameSetting
-{
-	init()
-	{
-		this.enabled = false;
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		attribs.settings.DisableSpies = this.enabled;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		this.enabled = !!this.getLegacySetting(attribs, "DisableSpies");
-	}
-
-	onMapChange()
-	{
-		if (this.settings.map.type != "scenario")
-			return;
-		this.setEnabled(!!this.getMapSetting("DisableSpies"));
-	}
-
-	setEnabled(enabled)
-	{
-		this.enabled = enabled;
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/DisableTreasures.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/DisableTreasures.js
@@ -1,30 +0,0 @@
-GameSettings.prototype.Attributes.DisableTreasures = class DisableTreasures extends GameSetting
-{
-	init()
-	{
-		this.enabled = false;
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		attribs.settings.DisableTreasures = this.enabled;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		this.enabled = !!this.getLegacySetting(attribs, "DisableTreasures");
-	}
-
-	onMapChange()
-	{
-		if (this.settings.map.type != "scenario")
-			return;
-		this.setEnabled(!!this.getMapSetting("DisableTreasures"));
-	}
-
-	setEnabled(enabled)
-	{
-		this.enabled = enabled;
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/GameSpeed.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/GameSpeed.js
@@ -1,31 +0,0 @@
-GameSettings.prototype.Attributes.GameSpeed = class GameSpeed extends GameSetting
-{
-	init()
-	{
-		this.gameSpeed = 1;
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		attribs.gameSpeed = +this.gameSpeed;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (attribs.gameSpeed)
-			this.gameSpeed = +attribs.gameSpeed;
-	}
-
-	onMapChange()
-	{
-		if (!this.getMapSetting("gameSpeed"))
-			return;
-		this.setSpeed(+this.getMapSetting("gameSpeed"));
-	}
-
-	setSpeed(speed)
-	{
-		this.gameSpeed = +speed;
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/Landscape.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/Landscape.js
@@ -1,75 +0,0 @@
-GameSettings.prototype.Attributes.Landscape = class Landscape extends GameSetting
-{
-	init()
-	{
-		this.data = undefined;
-		this.value = undefined;
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (this.value)
-			attribs.settings.Landscape = this.value;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (!this.getLegacySetting(attribs, "Landscape"))
-			this.setValue(undefined);
-		else
-			this.setValue(this.getLegacySetting(attribs, "Landscape"));
-	}
-
-	onMapChange()
-	{
-		if (!this.getMapSetting("Landscapes"))
-		{
-			this.value = undefined;
-			this.data = undefined;
-			return;
-		}
-		// TODO: validation
-		this.data = this.getMapSetting("Landscapes");
-		this.value = "random";
-	}
-
-	setValue(val)
-	{
-		// TODO: more validation.
-		if (this.data)
-			this.value = val || "random";
-		else
-			this.value = undefined;
-	}
-
-	getPreviewFilename()
-	{
-		if (!this.value)
-			return undefined;
-		for (let group of this.data)
-			for (let item of group.Items)
-				if (item.Id == this.value)
-					return item.Preview;
-		return undefined;
-	}
-
-	pickRandomItems()
-	{
-		// If the map is random, we need to wait until it is selected.
-		if (this.settings.map.map === "random" || !this.value || !this.value.startsWith("random"))
-			return false;
-
-		let items = [];
-		if (this.value.indexOf("_") !== -1)
-		{
-			let subgroup = this.data.find(x => x.Id == this.value);
-			items = subgroup.Items.map(x => x.Id);
-		}
-		else
-			items = this.data.map(x => x.Items.map(item => item.Id)).flat();
-
-		this.value = pickRandom(items);
-		return true;
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/LastManStanding.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/LastManStanding.js
@@ -1,38 +0,0 @@
-GameSettings.prototype.Attributes.LastManStanding = class LastManStanding extends GameSetting
-{
-	init()
-	{
-		this.available = !this.settings.lockedTeams.enabled;
-		this.enabled = false;
-		this.settings.lockedTeams.watch(() => this.maybeUpdate(), ["enabled"]);
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		attribs.settings.LastManStanding = this.enabled;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		this.enabled = !!this.getLegacySetting(attribs, "LastManStanding");
-	}
-
-	onMapChange()
-	{
-		if (this.settings.map.type != "scenario")
-			return;
-		this.setEnabled(!!this.getMapSetting("LastManStanding"));
-	}
-
-	setEnabled(enabled)
-	{
-		this.available = !this.settings.lockedTeams.enabled;
-		this.enabled = (enabled && this.available);
-	}
-
-	maybeUpdate()
-	{
-		this.setEnabled(this.enabled);
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/LockedTeams.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/LockedTeams.js
@@ -1,43 +0,0 @@
-GameSettings.prototype.Attributes.LockedTeams = class LockedTeams extends GameSetting
-{
-	init()
-	{
-		this.enabled = false;
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-		this.settings.rating.watch(() => this.onRatingChange(), ["enabled"]);
-		this.onRatingChange();
-	}
-
-	toInitAttributes(attribs)
-	{
-		attribs.settings.LockTeams = this.enabled;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		this.enabled = !!this.getLegacySetting(attribs, "LockTeams");
-	}
-
-	onMapChange()
-	{
-		if (this.settings.map.type != "scenario")
-			return;
-		this.setEnabled(!!this.getMapSetting("LockTeams"));
-	}
-
-	onRatingChange()
-	{
-		if (this.settings.rating.enabled)
-		{
-			this.available = false;
-			this.setEnabled(true);
-		}
-		else
-			this.available = true;
-	}
-
-	setEnabled(enabled)
-	{
-		this.enabled = enabled;
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/Map.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/Map.js
@@ -1,69 +0,0 @@
-/**
- * Map choice. This handles:
- *  - the map itself
- *  - map type (which is mostly a GUI thing and should probably be refactored out)
- *  - map script (for random maps).
- * When a non-"random" map is selected, the map 'script settings' are available at this.data.
- * TODO: the map description is currently tied to the map itself.
- */
-GameSettings.prototype.Attributes.Map = class Map extends GameSetting
-{
-	init()
-	{
-		this.watch(() => this.updateMapMetadata(), ["map"]);
-		this.randomOptions = [];
-	}
-
-	toInitAttributes(attribs)
-	{
-		attribs.map = this.map;
-		attribs.mapType = this.type;
-		if (this.script)
-			attribs.script = this.script;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (attribs.mapType)
-			this.setType(attribs.mapType);
-
-		if (!attribs.map)
-			return;
-
-		this.selectMap(attribs.map);
-	}
-
-	setType(mapType)
-	{
-		this.type = mapType;
-	}
-
-	selectMap(map)
-	{
-		this.data = this.settings.mapCache.getMapData(this.type, map);
-		this.map = map;
-	}
-
-	updateMapMetadata()
-	{
-		if (this.type == "random" && this.data)
-			this.script = this.data.settings.Script;
-		else
-			this.script = undefined;
-	}
-
-	pickRandomItems()
-	{
-		if (this.map !== "random")
-			return false;
-		this.selectMap(pickRandom(this.randomOptions));
-		return true;
-	}
-
-	setRandomOptions(options)
-	{
-		this.randomOptions = clone(options);
-		if (this.randomOptions.indexOf("random") !== -1)
-			this.randomOptions.splice(this.randomOptions.indexOf("random"), 1);
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/MapExploration.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/MapExploration.js
@@ -1,62 +0,0 @@
-GameSettings.prototype.Attributes.MapExploration = class MapExploration extends GameSetting
-{
-	init()
-	{
-		this.resetAll();
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	resetAll()
-	{
-		this.explored = false;
-		this.revealed = false;
-		this.allied = false;
-	}
-
-	toInitAttributes(attribs)
-	{
-		attribs.settings.RevealMap = this.revealed;
-		attribs.settings.ExploreMap = this.explored;
-		attribs.settings.AllyView = this.allied;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		this.explored = !!this.getLegacySetting(attribs, "ExploreMap");
-		this.revealed = !!this.getLegacySetting(attribs, "RevealMap");
-		this.allied = !!this.getLegacySetting(attribs, "AllyView");
-	}
-
-	onMapChange(mapData)
-	{
-		if (this.settings.map.type != "scenario")
-			return;
-		this.resetAll();
-		this.setExplored(this.getMapSetting("ExploreMap"));
-		this.setRevealed(this.getMapSetting("RevealMap"));
-		this.setAllied(this.getMapSetting("AllyView"));
-	}
-
-	setExplored(enabled)
-	{
-		if (enabled === undefined)
-			return;
-		this.explored = enabled;
-		this.revealed = this.revealed && this.explored;
-	}
-
-	setRevealed(enabled)
-	{
-		if (enabled === undefined)
-			return;
-		this.revealed = enabled;
-		this.explored = this.explored || this.revealed;
-	}
-
-	setAllied(enabled)
-	{
-		if (enabled === undefined)
-			return;
-		this.allied = enabled;
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/MapName.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/MapName.js
@@ -1,28 +0,0 @@
-/**
- * Map name.
- * This is usually just the regular map name, but can be overwritten.
- */
-GameSettings.prototype.Attributes.MapName = class MapName extends GameSetting
-{
-	init()
-	{
-		this.value = undefined;
-		this.settings.map.watch(() => this.updateName(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		attribs.settings.mapName = this.value;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (attribs?.settings?.mapName)
-			this.value = attribs.settings.mapName;
-	}
-
-	updateName()
-	{
-		this.value = this.settings.map?.data?.settings?.Name || this.settings.map.map;
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/MapPreview.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/MapPreview.js
@@ -1,64 +0,0 @@
-/**
- * Map Preview.
- * Can optionally overwrite the default map preview.
- */
-GameSettings.prototype.Attributes.MapPreview = class MapPreview extends GameSetting
-{
-	init()
-	{
-		this.value = undefined;
-		this.settings.map.watch(() => this.updatePreview(), ["map"]);
-		this.settings.biome.watch(() => this.updatePreview(), ["biome"]);
-		this.settings.landscape.watch(() => this.updatePreview(), ["value"]);
-		this.settings.daytime.watch(() => this.updatePreview(), ["value"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (this.value !== undefined)
-			attribs.settings.mapPreview = this.value;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (!!this.getLegacySetting(attribs, "mapPreview"))
-			this.value = this.getLegacySetting(attribs, "mapPreview");
-	}
-
-	getPreviewForSubtype(basepath, subtype)
-	{
-		if (!subtype)
-			return undefined;
-		let substr = subtype.substr(subtype.lastIndexOf("/") + 1);
-		let path = basepath + "_" + substr + ".png";
-		if (this.settings.mapCache.previewExists(path))
-			return this.settings.mapCache.getMapPreview(this.settings.map.type,
-				this.settings.map.map, path);
-		return undefined;
-	}
-
-	getLandscapePreview()
-	{
-		let filename = this.settings.landscape.getPreviewFilename();
-		if (!filename)
-			return undefined;
-		return this.settings.mapCache.getMapPreview(this.settings.map.type,
-			this.settings.map.map, filename);
-	}
-
-	updatePreview()
-	{
-		if (!this.settings.map.map)
-		{
-			this.value = undefined;
-			return;
-		}
-
-		// This handles "random" map type (mostly for convenience).
-		let mapPath = basename(this.settings.map.map);
-		this.value = this.getPreviewForSubtype(mapPath, this.settings.biome.biome) ||
-			this.getLandscapePreview() ||
-			this.getPreviewForSubtype(mapPath, this.settings.daytime.value) ||
-			this.settings.mapCache.getMapPreview(this.settings.map.type, this.settings.map.map);
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/MapSize.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/MapSize.js
@@ -1,35 +0,0 @@
-GameSettings.prototype.Attributes.MapSize = class MapSize extends GameSetting
-{
-	init()
-	{
-		this.defaultValue = this.getDefaultValue("MapSizes", "Tiles") || 256;
-		this.setSize(this.defaultValue);
-		this.settings.map.watch(() => this.onTypeChange(), ["type"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (this.settings.map.type === "random")
-			attribs.settings.Size = this.size;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (!!this.getLegacySetting(attribs, "Size"))
-			this.setSize(this.getLegacySetting(attribs, "Size"));
-	}
-
-	setSize(size)
-	{
-		this.available = this.settings.map.type === "random";
-		this.size = size;
-	}
-
-	onTypeChange(old)
-	{
-		if (this.settings.map.type === "random" && old !== "random")
-			this.setSize(this.defaultValue);
-		else if (this.settings.map.type !== "random")
-			this.available = false;
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/MatchID.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/MatchID.js
@@ -1,7 +0,0 @@
-GameSettings.prototype.Attributes.MatchID = class MatchID extends GameSetting
-{
-	onFinalizeAttributes(attribs)
-	{
-		attribs.matchID = Engine.GetMatchID();
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/Nomad.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/Nomad.js
@@ -1,23 +0,0 @@
-GameSettings.prototype.Attributes.Nomad = class Nomad extends GameSetting
-{
-	init()
-	{
-		this.enabled = false;
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (this.settings.map.type == "random")
-			attribs.settings.Nomad = this.enabled;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		this.setEnabled(!!this.getLegacySetting(attribs, "Nomad"));
-	}
-
-	setEnabled(enabled)
-	{
-		this.enabled = enabled;
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/PlayerAI.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/PlayerAI.js
@@ -1,127 +0,0 @@
-/**
- * Stores AI settings for all players.
- * Note that tby default, this does not assign AI
- * unless an AI bot is explicitly specified.
- * This is because:
- *  - the regular GameSetup does that on its own
- *  - this makes campaign/autostart scenarios easier to handle.
- *  - cleans the code here.
- */
-GameSettings.prototype.Attributes.PlayerAI = class PlayerAI extends GameSetting
-{
-	init()
-	{
-		// NB: watchers aren't auto-triggered when modifying array elements.
-		this.values = [];
-		this.settings.playerCount.watch(() => this.maybeUpdate(), ["nbPlayers"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (!attribs.settings.PlayerData)
-			attribs.settings.PlayerData = [];
-		while (attribs.settings.PlayerData.length < this.values.length)
-			attribs.settings.PlayerData.push({});
-		for (let i = 0; i < this.values.length; ++i)
-			if (this.values[i])
-			{
-				attribs.settings.PlayerData[i].AI = this.values[i].bot;
-				attribs.settings.PlayerData[i].AIDiff = this.values[i].difficulty;
-				attribs.settings.PlayerData[i].AIBehavior = this.values[i].behavior;
-			}
-			else
-				attribs.settings.PlayerData[i].AI = false;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (!this.getLegacySetting(attribs, "PlayerData"))
-			return;
-		const pData = this.getLegacySetting(attribs, "PlayerData");
-		for (let i = 0; i < this.values.length; ++i)
-		{
-			// Also covers the "" case.
-			if (!pData[i] || !pData[i].AI)
-			{
-				this.set(+i, undefined);
-				continue;
-			}
-			this.set(+i, {
-				"bot": pData[i].AI,
-				"difficulty": pData[i].AIDiff || +Engine.ConfigDB_GetValue("user", "gui.gamesetup.aidifficulty"),
-				"behavior": pData[i].AIBehavior || Engine.ConfigDB_GetValue("user", "gui.gamesetup.aibehavior"),
-			});
-		}
-	}
-
-	_resize(nb)
-	{
-		while (this.values.length > nb)
-			this.values.pop();
-		while (this.values.length < nb)
-			this.values.push(undefined);
-	}
-
-	maybeUpdate()
-	{
-		if (this.values.length === this.settings.playerCount.nbPlayers)
-			return;
-		this._resize(this.settings.playerCount.nbPlayers);
-		this.trigger("values");
-	}
-
-	swap(sourceIndex, targetIndex)
-	{
-		[this.values[sourceIndex], this.values[targetIndex]] = [this.values[targetIndex], this.values[sourceIndex]];
-		this.trigger("values");
-	}
-
-	set(playerIndex, botSettings)
-	{
-		this.values[playerIndex] = botSettings;
-		this.trigger("values");
-	}
-
-	setAI(playerIndex, ai)
-	{
-		let old = this.values[playerIndex] ? this.values[playerIndex].bot : undefined;
-		if (!ai)
-			this.values[playerIndex] = undefined;
-		else
-			this.values[playerIndex].bot = ai;
-		if (old !== (this.values[playerIndex] ? this.values[playerIndex].bot : undefined))
-			this.trigger("values");
-	}
-
-	setBehavior(playerIndex, value)
-	{
-		if (!this.values[playerIndex])
-			return;
-		this.values[playerIndex].behavior = value;
-		this.trigger("values");
-	}
-
-	setDifficulty(playerIndex, value)
-	{
-		if (!this.values[playerIndex])
-			return;
-		this.values[playerIndex].difficulty = value;
-		this.trigger("values");
-	}
-
-	get(playerIndex)
-	{
-		return this.values[playerIndex];
-	}
-
-	describe(playerIndex)
-	{
-		if (!this.values[playerIndex])
-			return "";
-		return translateAISettings({
-			"AI": this.values[playerIndex].bot,
-			"AIDiff": this.values[playerIndex].difficulty,
-			"AIBehavior": this.values[playerIndex].behavior,
-		});
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/PlayerCiv.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/PlayerCiv.js
@@ -1,136 +0,0 @@
-/**
- * Stores civ settings for all players.
- */
-GameSettings.prototype.Attributes.PlayerCiv = class PlayerCiv extends GameSetting
-{
-	init()
-	{
-		// NB: watchers aren't auto-triggered when modifying array elements.
-		this.values = [];
-		this.locked = [];
-		this.settings.playerCount.watch(() => this.maybeUpdate(), ["nbPlayers"]);
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (!attribs.settings.PlayerData)
-			attribs.settings.PlayerData = [];
-		while (attribs.settings.PlayerData.length < this.values.length)
-			attribs.settings.PlayerData.push({});
-		for (let i in this.values)
-			if (this.values[i])
-				attribs.settings.PlayerData[i].Civ = this.values[i];
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (!this.getLegacySetting(attribs, "PlayerData"))
-			return;
-		const pData = this.getLegacySetting(attribs, "PlayerData");
-		for (let i = 0; i < this.values.length; ++i)
-			if (pData[i] && pData[i].Civ)
-				this.setValue(i, pData[i].Civ);
-	}
-
-	_resize(nb)
-	{
-		while (this.values.length > nb)
-		{
-			this.values.pop();
-			this.locked.pop();
-		}
-		while (this.values.length < nb)
-		{
-			this.values.push("random");
-			this.locked.push(false);
-		}
-	}
-
-	onMapChange()
-	{
-		// Reset.
-		if (this.settings.map.type == "scenario" ||
-			this.getMapSetting("PlayerData") &&
-			this.getMapSetting("PlayerData").some(data => data && data.Civ))
-		{
-			this._resize(0);
-			this.maybeUpdate();
-		}
-		else
-		{
-			this.locked = this.locked.map(x => false);
-			this.trigger("locked");
-		}
-	}
-
-	maybeUpdate()
-	{
-		this._resize(this.settings.playerCount.nbPlayers);
-		this.values.forEach((c, i) => this._set(i, c));
-		this.trigger("values");
-	}
-
-	pickRandomItems()
-	{
-		// Get a unique array of selectable cultures
-		let cultures = Object.keys(this.settings.civData).filter(civ => this.settings.civData[civ].SelectableInGameSetup).map(civ => this.settings.civData[civ].Culture);
-		cultures = cultures.filter((culture, index) => cultures.indexOf(culture) === index);
-
-		let picked = false;
-		for (let i in this.values)
-		{
-			if (this.values[i] != "random")
-				continue;
-			picked = true;
-
-			// Pick a random civ of a random culture
-			let culture = pickRandom(cultures);
-			this.values[i] = pickRandom(Object.keys(this.settings.civData).filter(civ =>
-				this.settings.civData[civ].Culture == culture && this.settings.civData[civ].SelectableInGameSetup));
-
-		}
-		if (picked)
-			this.trigger("values");
-
-		return picked;
-	}
-
-	_getMapData(i)
-	{
-		let data = this.settings.map.data;
-		if (!data || !data.settings || !data.settings.PlayerData)
-			return undefined;
-		if (data.settings.PlayerData.length <= i)
-			return undefined;
-		return data.settings.PlayerData[i].Civ;
-	}
-
-	_set(playerIndex, value)
-	{
-		let map = this._getMapData(playerIndex);
-		if (!!map)
-		{
-			this.values[playerIndex] = map;
-			this.locked[playerIndex] = true;
-		}
-		else
-		{
-			this.values[playerIndex] = value;
-			this.locked[playerIndex] = this.settings.map.type == "scenario";
-		}
-	}
-
-	setValue(playerIndex, val)
-	{
-		this._set(playerIndex, val);
-		this.trigger("values");
-	}
-
-	swap(sourceIndex, targetIndex)
-	{
-		[this.values[sourceIndex], this.values[targetIndex]] = [this.values[targetIndex], this.values[sourceIndex]];
-		[this.locked[sourceIndex], this.locked[targetIndex]] = [this.locked[targetIndex], this.locked[sourceIndex]];
-		this.trigger("values");
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/PlayerColor.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/PlayerColor.js
@@ -1,191 +0,0 @@
-/**
- * Stores player color for all players.
- */
-GameSettings.prototype.Attributes.PlayerColor = class PlayerColor extends GameSetting
-{
-	init()
-	{
-		this.defaultColors = g_Settings.PlayerDefaults.slice(1).map(pData => pData.Color);
-
-		this.watch(() => this.maybeUpdate(), ["available"]);
-		this.settings.playerCount.watch(() => this.maybeUpdate(), ["nbPlayers"]);
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-
-		// NB: watchers aren't auto-triggered when modifying array elements.
-		this.values = [];
-		this.locked = [];
-		this._updateAvailable();
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (!attribs.settings.PlayerData)
-			attribs.settings.PlayerData = [];
-		while (attribs.settings.PlayerData.length < this.values.length)
-			attribs.settings.PlayerData.push({});
-		for (let i in this.values)
-			if (this.values[i])
-				attribs.settings.PlayerData[i].Color = this.values[i];
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (!this.getLegacySetting(attribs, "PlayerData"))
-			return;
-		const pData = this.getLegacySetting(attribs, "PlayerData");
-		for (let i = 0; i < this.values.length; ++i)
-			if (pData[i] && pData[i].Color)
-				this.setColor(i, pData[i].Color);
-	}
-
-	_resize(nb)
-	{
-		while (this.values.length > nb)
-		{
-			this.values.pop();
-			this.locked.pop();
-		}
-		while (this.values.length < nb)
-		{
-			this.values.push(undefined);
-			this.locked.push(false);
-		}
-	}
-
-	onMapChange()
-	{
-		// Reset.
-		this.locked = this.locked.map(x => this.settings.map.type == "scenario");
-		this.trigger("locked");
-		if (this.settings.map.type === "scenario")
-			this._resize(0);
-		this._updateAvailable();
-		this.maybeUpdate();
-	}
-
-	maybeUpdate()
-	{
-		this._resize(this.settings.playerCount.nbPlayers);
-
-		this.values.forEach((c, i) => this._set(i, c));
-		this.trigger("values");
-	}
-
-	_set(playerIndex, color)
-	{
-		let inUse = this.values.findIndex((otherColor, i) =>
-			color && otherColor &&
-			sameColor(color, otherColor));
-		if (inUse != -1 && inUse != playerIndex)
-		{
-			// Swap colors.
-			let col = this.values[playerIndex];
-			this.values[playerIndex] = undefined;
-			this._set(inUse, col);
-		}
-		if (!color || this.available.indexOf(color) == -1)
-		{
-			this.values[playerIndex] = color ?
-				this._findClosestColor(color, this.available) :
-				this._getUnusedColor();
-		}
-		else
-			this.values[playerIndex] = color;
-	}
-
-	get(playerIndex)
-	{
-		if (playerIndex >= this.values.length)
-			return undefined;
-		return this.values[playerIndex];
-	}
-
-	setColor(playerIndex, color)
-	{
-		this._set(playerIndex, color);
-		this.trigger("values");
-	}
-
-	swap(sourceIndex, targetIndex)
-	{
-		[this.values[sourceIndex], this.values[targetIndex]] = [this.values[targetIndex], this.values[sourceIndex]];
-		[this.locked[sourceIndex], this.locked[targetIndex]] = [this.locked[targetIndex], this.locked[sourceIndex]];
-		this.trigger("values");
-	}
-
-	_getMapData(i)
-	{
-		let data = this.settings.map.data;
-		if (!data || !data.settings || !data.settings.PlayerData)
-			return undefined;
-		if (data.settings.PlayerData.length <= i)
-			return undefined;
-		return data.settings.PlayerData[i].Color;
-	}
-
-	_updateAvailable()
-	{
-		// Pick colors that the map specifies, add most unsimilar default colors
-		// Provide the access to g_MaxPlayers different colors, regardless of current playercount.
-		let values = [];
-		let mapColors = false;
-		for (let i = 0; i < g_MaxPlayers; ++i)
-		{
-			let col = this._getMapData(i);
-			if (col)
-				mapColors = true;
-			if (mapColors)
-				values.push(col || this._findFarthestUnusedColor(values));
-			else
-				values.push(this.defaultColors[i]);
-		}
-		this.available = values;
-	}
-
-	_findClosestColor(targetColor, colors)
-	{
-		let closestColor;
-		let closestColorDistance = 0;
-		for (let color of colors)
-		{
-			let dist = colorDistance(targetColor, color);
-			if (!closestColor || dist < closestColorDistance)
-			{
-				closestColor = color;
-				closestColorDistance = dist;
-			}
-		}
-		return closestColor;
-	}
-
-	_findFarthestUnusedColor(values)
-	{
-		let farthestColor;
-		let farthestDistance = 0;
-
-		for (let defaultColor of this.defaultColors)
-		{
-			let smallestDistance = Infinity;
-			for (let usedColor of values)
-			{
-				let distance = colorDistance(usedColor, defaultColor);
-				if (distance < smallestDistance)
-					smallestDistance = distance;
-			}
-
-			if (smallestDistance >= farthestDistance)
-			{
-				farthestColor = defaultColor;
-				farthestDistance = smallestDistance;
-			}
-		}
-		return farthestColor;
-	}
-
-	_getUnusedColor()
-	{
-		return this.available.find(color => {
-			return this.values.every(otherColor => !otherColor || !sameColor(color, otherColor));
-		});
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/PlayerCount.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/PlayerCount.js
@@ -1,65 +0,0 @@
-GameSettings.prototype.Attributes.PlayerCount = class PlayerCount extends GameSetting
-{
-	init()
-	{
-		this.nbPlayers = 1;
-		this.settings.map.watch(() => this.onMapTypeChange(), ["type"]);
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (!attribs.settings.PlayerData)
-			attribs.settings.PlayerData = [];
-		while (attribs.settings.PlayerData.length < this.nbPlayers)
-			attribs.settings.PlayerData.push({});
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (this.settings.map.map !== undefined)
-			this.reloadFromLegacy(attribs);
-	}
-
-	onMapTypeChange(old)
-	{
-		if (this.settings.map.type == "random" && old != "random")
-			this.nbPlayers = 2;
-	}
-
-	onMapChange()
-	{
-		if (this.settings.map.type == "random")
-			return;
-		if (!this.settings.map.data || !this.settings.map.data.settings ||
-			!this.settings.map.data.settings.PlayerData)
-			return;
-		this.nbPlayers = this.settings.map.data.settings.PlayerData.length;
-	}
-
-	reloadFromLegacy(data)
-	{
-		if (this.settings.map.type != "random")
-		{
-			if (this.settings.map.data && this.settings.map.data.settings && this.settings.map.data.settings.PlayerData)
-				this.nbPlayers = this.settings.map.data.settings.PlayerData.length;
-			return;
-		}
-		if (!data || !data.settings || data.settings.PlayerData === undefined)
-			return;
-		this.nbPlayers = data.settings.PlayerData.length;
-	}
-
-	/**
-	 * @param index - Player Index, 0 is 'player 1' since GAIA isn't there.
-	 */
-	get(index)
-	{
-		return this.data[index];
-	}
-
-	setNb(nb)
-	{
-		this.nbPlayers = Math.max(1, Math.min(g_MaxPlayers, nb));
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/PlayerName.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/PlayerName.js
@@ -1,136 +0,0 @@
-/**
- * Stores in-game names for all players.
- *
- * NB: the regular gamesetup has a particular handling of this setting.
- * The names are loaded from the map, but the GUI also show playernames.
- * Force these at the start of the match.
- */
-GameSettings.prototype.Attributes.PlayerName = class PlayerName extends GameSetting
-{
-	init()
-	{
-		// NB: watchers aren't auto-triggered when modifying array elements.
-		this.values = [];
-		this.settings.playerCount.watch(() => this.maybeUpdate(), ["nbPlayers"]);
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (!attribs.settings.PlayerData)
-			attribs.settings.PlayerData = [];
-		while (attribs.settings.PlayerData.length < this.values.length)
-			attribs.settings.PlayerData.push({});
-		for (let i in this.values)
-			if (this.values[i])
-				attribs.settings.PlayerData[i].Name = this.values[i];
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (!this.getLegacySetting(attribs, "PlayerData"))
-			return;
-		const pData = this.getLegacySetting(attribs, "PlayerData");
-		for (let i = 0; i < this.values.length; ++i)
-			if (pData[i] && pData[i].Name !== undefined)
-			{
-				this.values[i] = pData[i].Name;
-				this.trigger("values");
-			}
-	}
-
-	_resize(nb)
-	{
-		while (this.values.length > nb)
-			this.values.pop();
-		while (this.values.length < nb)
-			this.values.push(undefined);
-	}
-
-	onMapChange()
-	{
-		// Reset.
-		this._resize(0);
-		this.maybeUpdate();
-	}
-
-	maybeUpdate()
-	{
-		this._resize(this.settings.playerCount.nbPlayers);
-		this.values.forEach((_, i) => this._set(i));
-		this.trigger("values");
-	}
-
-	/**
-	 * Pick bot names.
-	 */
-	pickRandomItems()
-	{
-		let picked = false;
-		for (let i in this.values)
-		{
-			if (!!this.values[i] &&
-				this.values[i] !== g_Settings.PlayerDefaults[+i + 1].Name)
-				continue;
-
-			let ai = this.settings.playerAI.values[i];
-			if (!ai)
-				continue;
-
-			let civ = this.settings.playerCiv.values[i];
-			if (!civ || civ == "random")
-				continue;
-
-			picked = true;
-			// Pick one of the available botnames for the chosen civ
-			// Determine botnames
-			let chosenName = pickRandom(this.settings.civData[civ].AINames);
-			if (!this.settings.isNetworked)
-				chosenName = translate(chosenName);
-
-			// Count how many players use the chosenName
-			let usedName = this.values.filter(oName => oName && oName.indexOf(chosenName) !== -1).length;
-
-			this.values[i] =
-				usedName ?
-					sprintf(this.RomanLabel, {
-						"playerName": chosenName,
-						"romanNumber": this.RomanNumbers[usedName + 1]
-					}) :
-					chosenName;
-		}
-		if (picked)
-			this.trigger("values");
-		return picked;
-	}
-
-	onFinalizeAttributes(attribs, playerAssignments)
-	{
-		// Replace client player names with the real players.
-		for (const guid in playerAssignments)
-			if (playerAssignments[guid].player !== -1)
-				attribs.settings.PlayerData[playerAssignments[guid].player -1].Name = playerAssignments[guid].name;
-	}
-
-	_getMapData(i)
-	{
-		let data = this.settings.map.data;
-		if (!data || !data.settings || !data.settings.PlayerData)
-			return undefined;
-		if (data.settings.PlayerData.length <= i)
-			return undefined;
-		return data.settings.PlayerData[i].Name;
-	}
-
-	_set(playerIndex)
-	{
-		this.values[playerIndex] = this._getMapData(playerIndex) || g_Settings && g_Settings.PlayerDefaults[playerIndex + 1].Name || "";
-	}
-};
-
-
-GameSettings.prototype.Attributes.PlayerName.prototype.RomanLabel =
-	translate("%(playerName)s %(romanNumber)s");
-
-GameSettings.prototype.Attributes.PlayerName.prototype.RomanNumbers =
-	[undefined, "I", "II", "III", "IV", "V", "VI", "VII", "VIII"];
Index: binaries/data/mods/public/gui/gamesettings/attributes/PlayerTeam.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/PlayerTeam.js
@@ -1,80 +0,0 @@
-/**
- * Stores team settings for all players.
- */
-GameSettings.prototype.Attributes.PlayerTeam = class PlayerTeam extends GameSetting
-{
-	init()
-	{
-		// NB: watchers aren't auto-triggered when modifying array elements.
-		this.values = [];
-		this.locked = [];
-		this.settings.playerCount.watch(() => this.maybeUpdate(), ["nbPlayers"]);
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (!attribs.settings.PlayerData)
-			attribs.settings.PlayerData = [];
-		while (attribs.settings.PlayerData.length < this.values.length)
-			attribs.settings.PlayerData.push({});
-		for (let i in this.values)
-			if (this.values[i] !== undefined)
-				attribs.settings.PlayerData[i].Team = this.values[i];
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (!this.getLegacySetting(attribs, "PlayerData"))
-			return;
-		const pData = this.getLegacySetting(attribs, "PlayerData");
-		for (let i = 0; i < this.values.length; ++i)
-			if (pData[i] && pData[i].Team !== undefined)
-				this.setValue(i, pData[i].Team);
-	}
-
-	_resize(nb)
-	{
-		while (this.values.length > nb)
-		{
-			this.values.pop();
-			this.locked.pop();
-		}
-		while (this.values.length < nb)
-		{
-			// -1 is None
-			this.values.push(-1);
-			this.locked.push(false);
-		}
-	}
-
-	onMapChange()
-	{
-		this.locked = this.locked.map(x => this.settings.map.type === "scenario");
-		this.trigger("locked");
-		if (this.settings.map.type !== "scenario")
-			return;
-		const pData = this.getMapSetting("PlayerData");
-		for (const p in pData)
-			this._set(+p, pData[p].Team === undefined ? -1 : pData[p].Team);
-		this.trigger("values");
-	}
-
-	maybeUpdate()
-	{
-		this._resize(this.settings.playerCount.nbPlayers);
-		this.values.forEach((c, i) => this._set(i, c));
-		this.trigger("values");
-	}
-
-	_set(playerIndex, value)
-	{
-		this.values[playerIndex] = value;
-	}
-
-	setValue(playerIndex, val)
-	{
-		this._set(playerIndex, val);
-		this.trigger("values");
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/Population.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/Population.js
@@ -1,75 +0,0 @@
-/**
- * Combines the worldPopulation and regular population cap.
- * At the moment those are incompatible so this makes sense.
- * TODO: Should there be a dialog allowing per-player pop limits?
- */
-GameSettings.prototype.Attributes.Population = class Population extends GameSetting
-{
-	init()
-	{
-		this.popDefault = this.getDefaultValue("PopulationCapacities", "Population") || 200;
-		this.worldPopDefault = this.getDefaultValue("WorldPopulationCapacities", "Population") || 800;
-
-		this.perPlayer = false;
-		this.useWorldPop = false;
-		this.cap = this.popDefault;
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (this.perPlayer)
-		{
-			if (!attribs.settings.PlayerData)
-				attribs.settings.PlayerData = [];
-			while (attribs.settings.PlayerData.length < this.perPlayer.length)
-				attribs.settings.PlayerData.push({});
-			for (let i in this.perPlayer)
-				if (this.perPlayer[i])
-					attribs.settings.PlayerData[i].PopulationLimit = this.perPlayer[i];
-		}
-		if (this.useWorldPop)
-		{
-			attribs.settings.WorldPopulation = true;
-			attribs.settings.WorldPopulationCap = this.cap;
-		}
-		else
-			attribs.settings.PopulationCap = this.cap;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (!!this.getLegacySetting(attribs, "WorldPopulation"))
-			this.setPopCap(true, this.getLegacySetting(attribs, "WorldPopulationCap"));
-		else if (!!this.getLegacySetting(attribs, "PopulationCap"))
-			this.setPopCap(false, this.getLegacySetting(attribs, "PopulationCap"));
-	}
-
-	onMapChange()
-	{
-		this.perPlayer = undefined;
-		if (this.settings.map.type != "scenario")
-			return;
-		if (this.getMapSetting("PlayerData")?.some(data => data.PopulationLimit))
-			this.perPlayer = this.getMapSetting("PlayerData").map(data => data.PopulationLimit || undefined);
-		else if (this.getMapSetting("WorldPopulation"))
-			this.setPopCap(true, +this.getMapSetting("WorldPopulationCap"));
-		else
-			this.setPopCap(false, +this.getMapSetting("PopulationCap"));
-	}
-
-	setPopCap(worldPop, cap = undefined)
-	{
-		if (worldPop != this.useWorldPop)
-			this.cap = undefined;
-
-		this.useWorldPop = worldPop;
-
-		if (!!cap)
-			this.cap = cap;
-		else if (!this.cap && !this.useWorldPop)
-			this.cap = this.popDefault;
-		else if (!this.cap && this.useWorldPop)
-			this.cap = this.worldPopDefault;
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/Rating.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/Rating.js
@@ -1,44 +0,0 @@
-GameSettings.prototype.Attributes.Rating = class Rating extends GameSetting
-{
-	init()
-	{
-		this.hasXmppClient = Engine.HasXmppClient();
-		this.settings.playerCount.watch(() => this.maybeUpdate(), ["nbPlayers"]);
-		this.settings.cheats.watch(() => this.maybeUpdate(), ["enabled"]);
-		this.maybeUpdate();
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (this.available)
-			attribs.settings.RatingEnabled = this.enabled;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (this.getLegacySetting(attribs, "RatingEnabled") !== undefined)
-		{
-			this.available = this.hasXmppClient && this.settings.playerCount.nbPlayers === 2;
-			this.enabled = this.available && !!this.getLegacySetting(attribs, "RatingEnabled");
-		}
-	}
-
-	setEnabled(enabled)
-	{
-		this.enabled = this.available && enabled;
-	}
-
-	maybeUpdate()
-	{
-		// This setting is activated by default if it's possible.
-		this.available = this.hasXmppClient &&
-			this.settings.playerCount.nbPlayers === 2 &&
-			!this.settings.cheats.enabled;
-		this.enabled = this.available;
-	}
-
-	onFinalizeAttributes()
-	{
-		Engine.SetRankedGame(this.enabled);
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/RegicideGarrison.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/RegicideGarrison.js
@@ -1,38 +0,0 @@
-GameSettings.prototype.Attributes.RegicideGarrison = class RegicideGarrison extends GameSetting
-{
-	init()
-	{
-		this.setEnabled(false);
-		this.settings.victoryConditions.watch(() => this.maybeUpdate(), ["active"]);
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (this.available)
-			attribs.settings.RegicideGarrison = this.enabled;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		this.enabled = !!this.getLegacySetting(attribs, "RegicideGarrison");
-	}
-
-	onMapChange()
-	{
-		if (this.settings.map.type != "scenario")
-			return;
-		this.setEnabled(!!this.getMapSetting("RegicideGarrison"));
-	}
-
-	setEnabled(enabled)
-	{
-		this.available = this.settings.victoryConditions.active.has("regicide");
-		this.enabled = (enabled && this.available);
-	}
-
-	maybeUpdate()
-	{
-		this.setEnabled(this.enabled);
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/Relic.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/Relic.js
@@ -1,62 +0,0 @@
-GameSettings.prototype.Attributes.Relic = class Relic extends GameSetting
-{
-	init()
-	{
-		this.available = false;
-		this.count = 0;
-		this.duration = 0;
-		this.settings.victoryConditions.watch(() => this.maybeUpdate(), ["active"]);
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		// For consistency, only save this if the victory condition is active.
-		if (this.available)
-		{
-			attribs.settings.RelicCount = this.count;
-			attribs.settings.RelicDuration = this.duration;
-		}
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (!!this.getLegacySetting(attribs, "RelicCount"))
-			this.setCount(this.getLegacySetting(attribs, "RelicCount"));
-		if (!!this.getLegacySetting(attribs, "RelicDuration"))
-			this.setDuration(this.getLegacySetting(attribs, "RelicDuration"));
-	}
-
-	onMapChange()
-	{
-		if (this.settings.map.type != "scenario")
-			return;
-		// TODO: probably should sync the victory condition.
-		if (!this.getMapSetting("RelicCount"))
-			this.available = false;
-		else
-			this._set(+this.getMapSetting("RelicCount"), +this.getMapSetting("RelicDuration"));
-	}
-
-	_set(count, duration)
-	{
-		this.available = this.settings.victoryConditions.active.has("capture_the_relic");
-		this.count = Math.max(1, count);
-		this.duration = duration;
-	}
-
-	setCount(val)
-	{
-		this._set(Math.round(val), this.duration);
-	}
-
-	setDuration(val)
-	{
-		this._set(this.count, Math.round(val));
-	}
-
-	maybeUpdate()
-	{
-		this._set(this.count, this.duration);
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/SeaLevelRise.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/SeaLevelRise.js
@@ -1,43 +0,0 @@
-GameSettings.prototype.Attributes.SeaLevelRise = class SeaLevelRise extends GameSetting
-{
-	init()
-	{
-		this.min = undefined;
-		this.max = undefined;
-		this.value = undefined;
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (this.value !== undefined)
-			attribs.settings.SeaLevelRiseTime = this.value;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (!!this.getLegacySetting(attribs, "SeaLevelRiseTime"))
-			this.setValue(this.getLegacySetting(attribs, "SeaLevelRiseTime"));
-	}
-
-	onMapChange()
-	{
-		if (!this.getMapSetting("SeaLevelRise"))
-		{
-			this.value = undefined;
-			return;
-		}
-		let mapData = this.settings.map.data;
-		this.min = mapData.settings.SeaLevelRise.Min;
-		this.max = mapData.settings.SeaLevelRise.Max;
-		this.value = mapData.settings.SeaLevelRise.Default;
-	}
-
-	setValue(val)
-	{
-		if (!this.getMapSetting("SeaLevelRise"))
-			this.value = undefined;
-		else
-			this.value = Math.max(this.min, Math.min(this.max, Math.round(val)));
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/Seeds.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/Seeds.js
@@ -1,39 +0,0 @@
-GameSettings.prototype.Attributes.Seeds = class Seeds extends GameSetting
-{
-	init()
-	{
-		this.seed = "random";
-		this.AIseed = "random";
-	}
-
-	toInitAttributes(attribs)
-	{
-		attribs.settings.Seed = this.seed == "random" ? this.seed : +this.seed;
-		attribs.settings.AISeed = this.AIseed == "random" ? this.AIseed : +this.AIseed;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (this.getLegacySetting(attribs, "Seed") !== undefined)
-			this.seed = this.getLegacySetting(attribs, "Seed");
-		if (this.getLegacySetting(attribs, "AISeed") !== undefined)
-			this.AIseed = this.getLegacySetting(attribs, "AISeed");
-	}
-
-	pickRandomItems()
-	{
-		let picked = false;
-		if (this.seed === "random")
-		{
-			this.seed = randIntExclusive(0, Math.pow(2, 32));
-			picked = true;
-		}
-
-		if (this.AIseed === "random")
-		{
-			this.AIseed = randIntExclusive(0, Math.pow(2, 32));
-			picked = true;
-		}
-		return picked;
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/StartingCamera.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/StartingCamera.js
@@ -1,62 +0,0 @@
-/**
- * For compatibility reasons, this loads the per-player StartingCamera from the map data
- * In general, this is probably better handled by map triggers or the default camera placement.
- * This doesn't have a GUI setting.
- */
-GameSettings.prototype.Attributes.StartingCamera = class StartingCamera extends GameSetting
-{
-	init()
-	{
-		this.values = [];
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-		this.settings.playerCount.watch(() => this.maybeUpdate(), ["nbPlayers"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (!attribs.settings.PlayerData)
-			attribs.settings.PlayerData = [];
-		while (attribs.settings.PlayerData.length < this.values.length)
-			attribs.settings.PlayerData.push({});
-		for (const i in this.values)
-			if (this.values[i])
-				attribs.settings.PlayerData[i].StartingCamera = this.values[i];
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (!this.getLegacySetting(attribs, "PlayerData"))
-			return;
-		const pData = this.getLegacySetting(attribs, "PlayerData");
-		for (let i = 0; i < this.values.length; ++i)
-			if (pData[i] && pData[i].StartingCamera !== undefined)
-			{
-				this.values[i] = pData[i].StartingCamera;
-				this.trigger("values");
-			}
-	}
-
-	_resize(nb)
-	{
-		while (this.values.length > nb)
-			this.values.pop();
-		while (this.values.length < nb)
-			this.values.push(undefined);
-	}
-
-	onMapChange()
-	{
-		let pData = this.getMapSetting("PlayerData");
-		this._resize(pData?.length || 0);
-		for (let i in pData)
-			this.values[i] = pData?.[i]?.StartingCamera;
-	}
-
-	maybeUpdate()
-	{
-		if (this.values.length === this.settings.playerCount.nbPlayers)
-			return;
-		this._resize(this.settings.playerCount.nbPlayers);
-		this.trigger("values");
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/StartingResources.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/StartingResources.js
@@ -1,53 +0,0 @@
-/**
- * TODO: There should be a dialog allowing to specify starting resources per player
- */
-GameSettings.prototype.Attributes.StartingResources = class StartingResources extends GameSetting
-{
-	init()
-	{
-		this.defaultValue = this.getDefaultValue("StartingResources", "Resources") || 300;
-		this.perPlayer = undefined;
-		this.setResources(this.defaultValue);
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (this.perPlayer)
-		{
-			if (!attribs.settings.PlayerData)
-				attribs.settings.PlayerData = [];
-			while (attribs.settings.PlayerData.length < this.perPlayer.length)
-				attribs.settings.PlayerData.push({});
-			for (let i in this.perPlayer)
-				if (this.perPlayer[i])
-					attribs.settings.PlayerData[i].Resources = this.perPlayer[i];
-		}
-		attribs.settings.StartingResources = this.resources;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (this.getLegacySetting(attribs, "StartingResources") !== undefined)
-			this.setResources(this.getLegacySetting(attribs, "StartingResources"));
-	}
-
-	onMapChange()
-	{
-		this.perPlayer = undefined;
-		if (this.settings.map.type != "scenario")
-			return;
-		if (!!this.getMapSetting("PlayerData") &&
-		     this.getMapSetting("PlayerData").some(data => data.Resources))
-			this.perPlayer = this.getMapSetting("PlayerData").map(data => data.Resources || undefined);
-		else if (!this.getMapSetting("StartingResources"))
-			this.setResources(this.defaultValue);
-		else
-			this.setResources(this.getMapSetting("StartingResources"));
-	}
-
-	setResources(res)
-	{
-		this.resources = res;
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/TeamPlacement.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/TeamPlacement.js
@@ -1,73 +0,0 @@
-GameSettings.prototype.Attributes.TeamPlacement = class TeamPlacement extends GameSetting
-{
-	init()
-	{
-		this.available = undefined;
-		this.value = undefined;
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (this.value !== undefined)
-			attribs.settings.TeamPlacement = this.value;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (!!this.getLegacySetting(attribs, "TeamPlacement"))
-			this.value = this.getLegacySetting(attribs, "TeamPlacement");
-	}
-
-	onMapChange()
-	{
-		if (!this.getMapSetting("TeamPlacements"))
-		{
-			this.value = undefined;
-			this.available = undefined;
-			return;
-		}
-		// TODO: should probably validate that they fit one of the known schemes.
-		this.available = this.getMapSetting("TeamPlacements");
-		this.value = "random";
-	}
-
-	setValue(val)
-	{
-		this.value = val;
-	}
-
-	pickRandomItems()
-	{
-		// If the map is random, we need to wait until it is selected.
-		if (this.settings.map.map === "random" || this.value !== "random")
-			return false;
-
-		this.value = pickRandom(this.available).Id;
-		return true;
-	}
-};
-
-
-GameSettings.prototype.Attributes.TeamPlacement.prototype.StartingPositions = [
-	{
-		"Id": "radial",
-		"Name": translateWithContext("team placement", "Circle"),
-		"Description": translate("Allied players are grouped and placed with opposing players on one circle spanning the map.")
-	},
-	{
-		"Id": "line",
-		"Name": translateWithContext("team placement", "Line"),
-		"Description": translate("Allied players are placed in a linear pattern."),
-	},
-	{
-		"Id": "randomGroup",
-		"Name": translateWithContext("team placement", "Random Group"),
-		"Description": translate("Allied players are grouped, but otherwise placed randomly on the map."),
-	},
-	{
-		"Id": "stronghold",
-		"Name": translateWithContext("team placement", "Stronghold"),
-		"Description": translate("Allied players are grouped in one random place of the map."),
-	}
-];
Index: binaries/data/mods/public/gui/gamesettings/attributes/TriggerDifficulty.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/TriggerDifficulty.js
@@ -1,52 +0,0 @@
-GameSettings.prototype.Attributes.TriggerDifficulty = class TriggerDifficulty extends GameSetting
-{
-	init()
-	{
-		this.difficulties = loadSettingValuesFile("trigger_difficulties.json");
-		this.available = undefined;
-		this.value = undefined;
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (this.available)
-			attribs.settings.TriggerDifficulty = this.value;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (this.getLegacySetting(attribs, "TriggerDifficulty") !== undefined)
-			this.setValue(this.getLegacySetting(attribs, "TriggerDifficulty"));
-	}
-
-	getAvailableSettings()
-	{
-		return this.difficulties.filter(x => this.available.indexOf(x.Name) !== -1);
-	}
-
-	onMapChange()
-	{
-		if (!this.getMapSetting("SupportedTriggerDifficulties"))
-		{
-			this.value = undefined;
-			this.available = undefined;
-			return;
-		}
-		// TODO: should probably validate that they fit one of the known schemes.
-		this.available = this.getMapSetting("SupportedTriggerDifficulties").Values;
-		this.value = this.difficulties.find(x => x.Default && this.available.indexOf(x.Name) !== -1).Difficulty;
-	}
-
-	setValue(val)
-	{
-		this.value = val;
-	}
-
-	getData()
-	{
-		if (!this.value)
-			return undefined;
-		return this.difficulties[this.value - 1];
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/TriggerScripts.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/TriggerScripts.js
@@ -1,52 +0,0 @@
-GameSettings.prototype.Attributes.TriggerScripts = class TriggerScripts extends GameSetting
-{
-	init()
-	{
-		this.customScripts = new Set();
-		this.victoryScripts = new Set();
-		this.mapScripts = new Set();
-		this.settings.map.watch(() => this.updateMapScripts(), ["map"]);
-		this.settings.victoryConditions.watch(() => this.updateVictoryScripts(), ["active"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		attribs.settings.TriggerScripts = Array.from(this.customScripts);
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (!!this.getLegacySetting(attribs, "TriggerScripts"))
-			this.customScripts = new Set(this.getLegacySetting(attribs, "TriggerScripts"));
-	}
-
-	updateVictoryScripts()
-	{
-		let setting = this.settings.victoryConditions;
-		let scripts = new Set();
-		for (let cond of setting.active)
-			setting.conditions[cond].Scripts.forEach(script => scripts.add(script));
-		this.victoryScripts = scripts;
-	}
-
-	updateMapScripts()
-	{
-		if (!this.settings.map.data || !this.settings.map.data.settings ||
-			!this.settings.map.data.settings.TriggerScripts)
-		{
-			this.mapScripts = new Set();
-			return;
-		}
-		this.mapScripts = new Set(this.settings.map.data.settings.TriggerScripts);
-	}
-
-	onFinalizeAttributes(attribs)
-	{
-		const scripts = this.customScripts;
-		for (const elem of this.victoryScripts)
-			scripts.add(elem);
-		for (const elem of this.mapScripts)
-			scripts.add(elem);
-		attribs.settings.TriggerScripts = Array.from(scripts);
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/VictoryConditions.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/VictoryConditions.js
@@ -1,96 +0,0 @@
-GameSettings.prototype.Attributes.VictoryConditions = class VictoryConditions extends GameSetting
-{
-	constructor(settings)
-	{
-		super(settings);
-		// Set of victory condition names.
-		this.active = new Set();
-		this.disabled = new Set();
-		this.conditions = {};
-	}
-
-	init()
-	{
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-
-		let conditions = loadVictoryConditions();
-		for (let cond of conditions)
-			this.conditions[cond.Name] = cond;
-
-		for (let cond in this.conditions)
-			if (this.conditions[cond].Default)
-				this._add(this.conditions[cond].Name);
-	}
-
-	toInitAttributes(attribs)
-	{
-		attribs.settings.VictoryConditions = Array.from(this.active);
-	}
-
-	fromInitAttributes(attribs)
-	{
-		let legacy = this.getLegacySetting(attribs, "VictoryConditions");
-		if (legacy)
-		{
-			this.disabled = new Set();
-			this.active = new Set();
-			for (let cond of legacy)
-				this._add(cond);
-		}
-	}
-
-	onMapChange()
-	{
-		if (this.settings.map.type != "scenario")
-			return;
-		// If a map specifies victory conditions, replace them all.
-		if (!this.getMapSetting("VictoryConditions"))
-			return;
-		this.disabled = new Set();
-		this.active = new Set();
-		// TODO: could be optimised.
-		for (let cond of this.getMapSetting("VictoryConditions"))
-			this._add(cond);
-	}
-
-	_reconstructDisabled(active)
-	{
-		let disabled = new Set();
-		for (let cond of active)
-			if (this.conditions[cond].DisabledWhenChecked)
-				this.conditions[cond].DisabledWhenChecked.forEach(x => disabled.add(x));
-
-		return disabled;
-	}
-
-	_add(name)
-	{
-		if (this.disabled.has(name))
-			return;
-		let active = clone(this.active);
-		active.add(name);
-		// Assume we want to remove incompatible ones.
-		if (this.conditions[name].DisabledWhenChecked)
-			this.conditions[name].DisabledWhenChecked.forEach(x => active.delete(x));
-		// TODO: sanity check
-		this.disabled = this._reconstructDisabled(active);
-		this.active = active;
-	}
-
-	_delete(name)
-	{
-		let active = clone(this.active);
-		active.delete(name);
-		// TODO: sanity check
-		this.disabled = this._reconstructDisabled(active);
-		this.active = active;
-	}
-
-	setEnabled(name, enabled)
-	{
-		if (enabled)
-			this._add(name);
-		else
-			this._delete(name);
-	}
-};
Index: binaries/data/mods/public/gui/gamesettings/attributes/Wonder.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/gui/gamesettings/attributes/Wonder.js
@@ -1,40 +0,0 @@
-GameSettings.prototype.Attributes.Wonder = class Wonder extends GameSetting
-{
-	init()
-	{
-		this.available = false;
-		this.duration = 0;
-		this.settings.victoryConditions.watch(() => this.maybeUpdate(), ["active"]);
-		this.settings.map.watch(() => this.onMapChange(), ["map"]);
-	}
-
-	toInitAttributes(attribs)
-	{
-		if (this.available)
-			attribs.settings.WonderDuration = this.duration;
-	}
-
-	fromInitAttributes(attribs)
-	{
-		if (this.getLegacySetting(attribs, "WonderDuration") !== undefined)
-			this.setDuration(+this.getLegacySetting(attribs, "WonderDuration"));
-	}
-
-	onMapChange()
-	{
-		if (this.settings.map.type != "scenario")
-			return;
-		this.setDuration(+this.getMapSetting("WonderDuration") || 0);
-	}
-
-	setDuration(duration)
-	{
-		this.available = this.settings.victoryConditions.active.has("wonder");
-		this.duration = Math.round(duration);
-	}
-
-	maybeUpdate()
-	{
-		this.setDuration(this.duration);
-	}
-};
Index: binaries/data/mods/public/gui/gamesetup/gamesetup.xml
===================================================================
--- binaries/data/mods/public/gui/gamesetup/gamesetup.xml
+++ binaries/data/mods/public/gui/gamesetup/gamesetup.xml
@@ -3,8 +3,8 @@
 
 	<script directory="gui/common/"/>
 	<script directory="gui/maps/"/>
-	<script directory="gui/gamesettings/"/>
-	<script directory="gui/gamesettings/attributes/"/>
+	<script directory="gamesettings/"/>
+	<script directory="gamesettings/attributes/"/>
 	<script directory="gui/gamesetup/"/>
 	<script directory="gui/gamesetup/Controllers/"/>
 	<script directory="gui/gamesetup/NetMessages/"/>
Index: binaries/data/mods/public/gui/page_autostart.xml
===================================================================
--- binaries/data/mods/public/gui/page_autostart.xml
+++ binaries/data/mods/public/gui/page_autostart.xml
@@ -2,7 +2,7 @@
 <page>
 	<!--
 		This is simply a convenience forwarder to avoid loading
-		the gameSettings from the main menu or command line.
+		the gameSettings from the main menu.
 	-->
 	<include>autostart/autostart.xml</include>
 </page>
Index: binaries/data/mods/public/gui/page_autostart_client.xml
===================================================================
--- binaries/data/mods/public/gui/page_autostart_client.xml
+++ /dev/null
@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<page>
-	<!--
-		This is simply a convenience forwarder to avoid loading
-		the gamesetup_mp when autostarting from command line.
-	-->
-	<include>common/modern/styles.xml</include>
-
-	<include>autostart/autostart_client.xml</include>
-</page>
Index: binaries/data/mods/public/gui/page_autostart_host.xml
===================================================================
--- binaries/data/mods/public/gui/page_autostart_host.xml
+++ /dev/null
@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<page>
-	<!--
-		This is simply a convenience forwarder to avoid loading
-		the gamesetup_mp when autostarting from command line.
-	-->
-	<include>common/modern/styles.xml</include>
-
-	<include>autostart/autostart_host.xml</include>
-</page>
Index: source/graphics/MapGenerator.cpp
===================================================================
--- source/graphics/MapGenerator.cpp
+++ source/graphics/MapGenerator.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2021 Wildfire Games.
+/* Copyright (C) 2022 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -170,7 +170,7 @@
 	m_MapGenRNG.seed(seed);
 
 	// VFS
-	JSI_VFS::RegisterScriptFunctions_Maps(*m_ScriptInterface);
+	JSI_VFS::RegisterScriptFunctions_ReadOnlySimulationMaps(*m_ScriptInterface);
 
 	// Globalscripts may use VFS script functions
 	m_ScriptInterface->LoadGlobalScripts();
Index: source/gui/Scripting/ScriptFunctions.cpp
===================================================================
--- source/gui/Scripting/ScriptFunctions.cpp
+++ source/gui/Scripting/ScriptFunctions.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2021 Wildfire Games.
+/* Copyright (C) 2022 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -71,6 +71,6 @@
 	JSI_Simulation::RegisterScriptFunctions(rq);
 	JSI_Sound::RegisterScriptFunctions(rq);
 	JSI_UserReport::RegisterScriptFunctions(rq);
-	JSI_VFS::RegisterScriptFunctions_GUI(rq);
+	JSI_VFS::RegisterScriptFunctions_ReadWriteAnywhere(rq);
 	JSI_VisualReplay::RegisterScriptFunctions(rq);
 }
Index: source/main.cpp
===================================================================
--- source/main.cpp
+++ source/main.cpp
@@ -455,10 +455,13 @@
 	g_Profiler2.IncrementFrameNumber();
 	PROFILE2_ATTR("%d", g_Profiler2.GetFrameNumber());
 
+	if (g_NetClient)
+		g_NetClient->Poll();
+
 	static u32 turn = 0;
-	debug_printf("Turn %u (%u)...\n", turn++, DEFAULT_TURN_LENGTH);
-
-	g_Game->GetSimulation2()->Update(DEFAULT_TURN_LENGTH);
+	if (g_Game && g_Game->IsGameStarted() && g_Game->GetTurnManager())
+		if (g_Game->GetTurnManager()->Update(DEFAULT_TURN_LENGTH, 1))
+			debug_printf("Turn %u (%u)...\n", turn++, DEFAULT_TURN_LENGTH);
 
 	g_Profiler.Frame();
 
@@ -505,7 +508,7 @@
 		return;
 	}
 
-	if (args.Has("autostart-nonvisual") && args.Get("autostart").empty() && !args.Has("rl-interface"))
+	if (args.Has("autostart-nonvisual") && args.Get("autostart").empty() && !args.Has("rl-interface") && !args.Has("autostart-client"))
 	{
 		LOGERROR("-autostart-nonvisual cant be used alone. A map with -autostart=\"TYPEDIR/MAPNAME\" is needed.");
 		return;
Index: source/ps/GameSetup/GameSetup.cpp
===================================================================
--- source/ps/GameSetup/GameSetup.cpp
+++ source/ps/GameSetup/GameSetup.cpp
@@ -24,6 +24,7 @@
 #include "graphics/TerrainTextureManager.h"
 #include "gui/CGUI.h"
 #include "gui/GUIManager.h"
+#include "gui/Scripting/JSInterface_GUIManager.h"
 #include "i18n/L10n.h"
 #include "lib/app_hooks.h"
 #include "lib/config2.h"
@@ -36,6 +37,7 @@
 #include "network/NetClient.h"
 #include "network/NetMessage.h"
 #include "network/NetMessages.h"
+#include "network/scripting/JSInterface_Network.h"
 #include "ps/CConsole.h"
 #include "ps/CLogger.h"
 #include "ps/ConfigDB.h"
@@ -58,6 +60,9 @@
 #include "ps/Profiler2.h"
 #include "ps/Pyrogenesis.h"	// psSetLogDir
 #include "ps/scripting/JSInterface_Console.h"
+#include "ps/scripting/JSInterface_Game.h"
+#include "ps/scripting/JSInterface_Main.h"
+#include "ps/scripting/JSInterface_VFS.h"
 #include "ps/TouchInput.h"
 #include "ps/UserReport.h"
 #include "ps/Util.h"
@@ -74,6 +79,7 @@
 #include "scriptinterface/ScriptContext.h"
 #include "scriptinterface/ScriptConversions.h"
 #include "simulation2/Simulation2.h"
+#include "simulation2/scripting/JSInterface_Simulation.h"
 #include "soundmanager/scripting/JSInterface_Sound.h"
 #include "soundmanager/ISoundManager.h"
 #include "tools/atlas/GameInterface/GameLoop.h"
@@ -760,6 +766,34 @@
 	return mapElement.GetText();
 }
 
+// TODO: this essentially duplicates the CGUI logic to load directory or scripts.
+// NB: this won't make sure to not double-load scripts, unlike the GUI.
+void AutostartLoadScript(const ScriptInterface& scriptInterface, const VfsPath& path)
+{
+	if (path.IsDirectory())
+	{
+		VfsPaths pathnames;
+		vfs::GetPathnames(g_VFS, path, L"*.js", pathnames);
+		for (const VfsPath& file : pathnames)
+			scriptInterface.LoadGlobalScriptFile(file);
+	}
+	else
+		scriptInterface.LoadGlobalScriptFile(path);
+}
+
+// TODO: this essentially duplicates the CGUI function
+const CParamNode& GetTemplate(const std::string& templateName)
+{
+	// Stores an internal cache that we return a reference to, so it needs to outlive the function.
+	static CTemplateLoader templateLoader;
+
+	const CParamNode& templateRoot = templateLoader.GetTemplateFileData(templateName).GetChild("Entity");
+	if (!templateRoot.IsOk())
+		LOGERROR("Invalid template found for '%s'", templateName.c_str());
+
+	return templateRoot;
+}
+
 /*
  * Command line options for autostart
  * (keep synchronized with binaries/system/readme.txt):
@@ -818,6 +852,9 @@
  */
 bool Autostart(const CmdLineArgs& args)
 {
+	if (!args.Has("autostart-client") && !args.Has("autostart"))
+		return false;
+
 	// Get optional playername.
 	CStrW userName = L"anonymous";
 	if (args.Has("autostart-playername"))
@@ -827,6 +864,29 @@
 	ScriptInterface scriptInterface("Engine", "Game Setup", g_ScriptContext);
 
 	ScriptRequest rq(scriptInterface);
+
+	// We use the javascript gameSettings to handle options, but that requires running JS.
+	// Since we don't want to use the full Gui manager, we load an entrypoint script
+	// that can run the priviledged "LoadScript" function, and then call the appropriate function.
+	ScriptFunction::Register<&AutostartLoadScript>(rq, "LoadScript");
+	// Load the entire folder to allow mods to extend the entrypoint without copying the whole file.
+	AutostartLoadScript(scriptInterface, VfsPath(L"autostart/"));
+
+	// Provide some required functions to the script.
+	if (args.Has("autostart-nonvisual"))
+		ScriptFunction::Register<&GetTemplate>(rq, "GetTemplate");
+	else
+	{
+		JSI_GUIManager::RegisterScriptFunctions(rq);
+		// TODO: this loads pregame, which is hardcoded to exist by various code paths. That ought be changed.
+		InitPs(false, L"page_pregame.xml", g_GUI->GetScriptInterface().get(), JS::UndefinedHandleValue);
+	}
+
+	JSI_Game::RegisterScriptFunctions(rq);
+	JSI_Main::RegisterScriptFunctions(rq);
+	JSI_Simulation::RegisterScriptFunctions(rq);
+	JSI_VFS::RegisterScriptFunctions_ReadWriteAnywhere(rq);
+
 	JS::RootedValue sessionInitData(rq.cx);
 
 	if (args.Has("autostart-client"))
@@ -843,8 +903,24 @@
 			"port", PS_DEFAULT_PORT,
 			"storeReplay", !args.Has("autostart-disable-replay"));
 
-		InitPs(true, L"page_autostart_client.xml", &scriptInterface, sessionInitData);
+		JSI_Network::RegisterScriptFunctions(rq);
 
+		JS::RootedValue global(rq.cx, rq.globalValue());
+		ScriptFunction::CallVoid(rq, global, "autostartClient", sessionInitData, true);
+
+		bool shouldQuit = false;
+		while (!shouldQuit)
+		{
+			g_NetClient->Poll();
+			ScriptFunction::Call(rq, global, "onTick", shouldQuit);
+			std::this_thread::sleep_for(std::chrono::microseconds(200));
+		}
+
+		if (args.Has("autostart-nonvisual"))
+		{
+			LDR_NonprogressiveLoad();
+			g_Game->ReallyStartGame();
+		}
 		return true;
 	}
 
@@ -1096,7 +1172,20 @@
 			"maxPlayers", maxPlayers,
 			"storeReplay", !args.Has("autostart-disable-replay"));
 
-		InitPs(true, L"page_autostart_host.xml", &scriptInterface, sessionInitData);
+		JSI_Network::RegisterScriptFunctions(rq);
+
+		JS::RootedValue global(rq.cx, rq.globalValue());
+		JS::RootedValue startGameSettings(rq.cx);
+		ScriptFunction::CallVoid(rq, global, "autostartHost", sessionInitData, true);
+
+		// In MP host mode, we need to wait until clients have loaded.
+		bool shouldQuit = false;
+		while (!shouldQuit)
+		{
+			g_NetClient->Poll();
+			ScriptFunction::Call(rq, global, "onTick", shouldQuit);
+			std::this_thread::sleep_for(std::chrono::microseconds(200));
+		}
 	}
 	else
 	{
@@ -1118,7 +1207,14 @@
 			"playerAssignments", playerAssignments,
 			"storeReplay", !args.Has("autostart-disable-replay"));
 
-		InitPs(true, L"page_autostart.xml", &scriptInterface, sessionInitData);
+		JS::RootedValue global(rq.cx, rq.globalValue());
+		ScriptFunction::CallVoid(rq, global, "autostartHost", sessionInitData, false);
+	}
+
+	if (args.Has("autostart-nonvisual"))
+	{
+		LDR_NonprogressiveLoad();
+		g_Game->ReallyStartGame();
 	}
 
 	return true;
Index: source/ps/scripting/JSInterface_VFS.h
===================================================================
--- source/ps/scripting/JSInterface_VFS.h
+++ source/ps/scripting/JSInterface_VFS.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2021 Wildfire Games.
+/* Copyright (C) 2022 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -22,9 +22,9 @@
 
 namespace JSI_VFS
 {
-	void RegisterScriptFunctions_GUI(const ScriptRequest& rq);
-	void RegisterScriptFunctions_Simulation(const ScriptRequest& rq);
-	void RegisterScriptFunctions_Maps(const ScriptRequest& rq);
+	void RegisterScriptFunctions_ReadWriteAnywhere(const ScriptRequest& rq);
+	void RegisterScriptFunctions_ReadOnlySimulation(const ScriptRequest& rq);
+	void RegisterScriptFunctions_ReadOnlySimulationMaps(const ScriptRequest& rq);
 }
 
 #endif // INCLUDED_JSI_VFS
Index: source/ps/scripting/JSInterface_VFS.cpp
===================================================================
--- source/ps/scripting/JSInterface_VFS.cpp
+++ source/ps/scripting/JSInterface_VFS.cpp
@@ -265,7 +265,7 @@
 VFS_ScriptFunctions(Maps);
 #undef VFS_ScriptFunctions
 
-void RegisterScriptFunctions_GUI(const ScriptRequest& rq)
+void RegisterScriptFunctions_ReadWriteAnywhere(const ScriptRequest& rq)
 {
 	ScriptFunction::Register<&Script_ListDirectoryFiles_GUI>(rq, "ListDirectoryFiles");
 	ScriptFunction::Register<&Script_FileExists_GUI>(rq, "FileExists");
@@ -278,14 +278,14 @@
 	ScriptFunction::Register<&DeleteCampaignSave>(rq, "DeleteCampaignSave");
 }
 
-void RegisterScriptFunctions_Simulation(const ScriptRequest& rq)
+void RegisterScriptFunctions_ReadOnlySimulation(const ScriptRequest& rq)
 {
 	ScriptFunction::Register<&Script_ListDirectoryFiles_Simulation>(rq, "ListDirectoryFiles");
 	ScriptFunction::Register<&Script_FileExists_Simulation>(rq, "FileExists");
 	ScriptFunction::Register<&Script_ReadJSONFile_Simulation>(rq, "ReadJSONFile");
 }
 
-void RegisterScriptFunctions_Maps(const ScriptRequest& rq)
+void RegisterScriptFunctions_ReadOnlySimulationMaps(const ScriptRequest& rq)
 {
 	ScriptFunction::Register<&Script_ListDirectoryFiles_Maps>(rq, "ListDirectoryFiles");
 	ScriptFunction::Register<&Script_FileExists_Maps>(rq, "FileExists");
Index: source/simulation2/components/CCmpAIManager.cpp
===================================================================
--- source/simulation2/components/CCmpAIManager.cpp
+++ source/simulation2/components/CCmpAIManager.cpp
@@ -270,7 +270,7 @@
 
 #undef REGISTER_FUNC_NAME
 
-		JSI_VFS::RegisterScriptFunctions_Simulation(rq);
+		JSI_VFS::RegisterScriptFunctions_ReadOnlySimulation(rq);
 
 		// Globalscripts may use VFS script functions
 		m_ScriptInterface->LoadGlobalScripts();
Index: source/simulation2/system/ComponentManager.cpp
===================================================================
--- source/simulation2/system/ComponentManager.cpp
+++ source/simulation2/system/ComponentManager.cpp
@@ -68,7 +68,7 @@
 	// these functions, so we skip registering them here in those cases
 	if (!skipScriptFunctions)
 	{
-		JSI_VFS::RegisterScriptFunctions_Simulation(m_ScriptInterface);
+		JSI_VFS::RegisterScriptFunctions_ReadOnlySimulation(m_ScriptInterface);
 		ScriptRequest rq(m_ScriptInterface);
 		constexpr ScriptFunction::ObjectGetter<CComponentManager> Getter = &ScriptInterface::ObjectFromCBData<CComponentManager>;
 		ScriptFunction::Register<&CComponentManager::Script_RegisterComponentType, Getter>(rq, "RegisterComponentType");