Index: ps/trunk/binaries/data/mods/public/gui/common/gamedescription.js
===================================================================
--- ps/trunk/binaries/data/mods/public/gui/common/gamedescription.js
+++ ps/trunk/binaries/data/mods/public/gui/common/gamedescription.js
@@ -397,6 +397,11 @@
 	});
 
 	titles.push({
+		"label": translate("Allied View"),
+		"value": initAttributes.settings.AllyView
+	});
+
+	titles.push({
 		"label": translate("Cheats"),
 		"value": initAttributes.settings.CheatsEnabled
 	});
Index: ps/trunk/binaries/data/mods/public/gui/credits/texts/programming.json
===================================================================
--- ps/trunk/binaries/data/mods/public/gui/credits/texts/programming.json
+++ ps/trunk/binaries/data/mods/public/gui/credits/texts/programming.json
@@ -125,6 +125,7 @@
 				{ "nick": "Itms", "name": "Nicolas Auvray" },
 				{ "nick": "Jaison", "name": "Marco tom Suden" },
 				{ "nick": "jammus", "name": "James Scott" },
+				{ "nick": "Jammyjamjamman", "name": "James Sherratt" },
 				{ "nick": "Janwas", "name": "Jan Wassenberg" },
 				{ "nick": "javiergodas", "name": "Javier Godas Vieitez" },
 				{ "nick": "JCWasmx86" },
Index: ps/trunk/binaries/data/mods/public/gui/gamesettings/attributes/MapExploration.js
===================================================================
--- ps/trunk/binaries/data/mods/public/gui/gamesettings/attributes/MapExploration.js
+++ ps/trunk/binaries/data/mods/public/gui/gamesettings/attributes/MapExploration.js
@@ -4,6 +4,7 @@
 	{
 		this.explored = false;
 		this.revealed = false;
+		this.allied = false;
 
 		this.settings.map.watch(() => this.onMapChange(), ["map"]);
 	}
@@ -12,12 +13,14 @@
 	{
 		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)
@@ -26,6 +29,7 @@
 			return;
 		this.setExplored(this.getMapSetting("ExploreMap"));
 		this.setRevealed(this.getMapSetting("RevealMap"));
+		this.setAllied(this.getMapSetting("AllyView"));
 	}
 
 	setExplored(enabled)
@@ -38,5 +42,12 @@
 	{
 		this.explored = this.explored || enabled;
 		this.revealed = enabled;
+		this.allied = this.allied || enabled;
+	}
+
+	setAllied(enabled)
+	{
+		this.allied = enabled;
+		this.revealed = this.revealed && this.allied;
 	}
 };
Index: ps/trunk/binaries/data/mods/public/gui/gamesetup/Pages/GameSetupPage/GameSettings/GameSettingsLayout.js
===================================================================
--- ps/trunk/binaries/data/mods/public/gui/gamesetup/Pages/GameSetupPage/GameSettings/GameSettingsLayout.js
+++ ps/trunk/binaries/data/mods/public/gui/gamesetup/Pages/GameSetupPage/GameSettings/GameSettingsLayout.js
@@ -20,7 +20,8 @@
 			"Nomad",
 			"Treasures",
 			"ExploredMap",
-			"RevealedMap"
+			"RevealedMap",
+			"AlliedView"
 		]
 	},
 	{
Index: ps/trunk/binaries/data/mods/public/gui/gamesetup/Pages/GameSetupPage/GameSettings/Single/Checkboxes/AlliedView.js
===================================================================
--- ps/trunk/binaries/data/mods/public/gui/gamesetup/Pages/GameSetupPage/GameSettings/Single/Checkboxes/AlliedView.js
+++ ps/trunk/binaries/data/mods/public/gui/gamesetup/Pages/GameSetupPage/GameSettings/Single/Checkboxes/AlliedView.js
@@ -0,0 +1,30 @@
+GameSettingControls.AlliedView = class AlliedView extends GameSettingControlCheckbox
+{
+	constructor(...args)
+	{
+		super(...args);
+		g_GameSettings.mapExploration.watch(() => this.render(), ["allied"]);
+		g_GameSettings.map.watch(() => this.render(), ["type"]);
+		this.render();
+	}
+
+	render()
+	{
+		this.setEnabled(g_GameSettings.map.type != "scenario");
+		this.setChecked(g_GameSettings.mapExploration.allied);
+	}
+
+	onPress(checked)
+	{
+		g_GameSettings.mapExploration.setAllied(checked);
+		this.gameSettingsController.setNetworkInitAttributes();
+	}
+};
+
+// Translation: View what your allies can see.
+GameSettingControls.AlliedView.prototype.TitleCaption =
+	translate("Allied View");
+
+// Translation: Enable viewing what your allies can see from the start of the game.
+GameSettingControls.AlliedView.prototype.Tooltip =
+	translate("Toggle allied view (see what your allies see).");
Index: ps/trunk/binaries/data/mods/public/gui/gamesetup/Pages/GameSetupPage/Panels/GameDescription.js
===================================================================
--- ps/trunk/binaries/data/mods/public/gui/gamesetup/Pages/GameSetupPage/Panels/GameDescription.js
+++ ps/trunk/binaries/data/mods/public/gui/gamesetup/Pages/GameSetupPage/Panels/GameDescription.js
@@ -23,6 +23,7 @@
 		g_GameSettings.map.watch(update, ["map", "type"]);
 		g_GameSettings.mapExploration.watch(update, ["explored"]);
 		g_GameSettings.mapExploration.watch(update, ["revealed"]);
+		g_GameSettings.mapExploration.watch(update, ["allied"]);
 		g_GameSettings.nomad.watch(update, ["enabled"]);
 		g_GameSettings.population.watch(update, ["perPlayer", "cap", "useWorldPop"]);
 		g_GameSettings.rating.watch(update, ["enabled"]);
Index: ps/trunk/binaries/data/mods/public/simulation/helpers/InitGame.js
===================================================================
--- ps/trunk/binaries/data/mods/public/simulation/helpers/InitGame.js
+++ ps/trunk/binaries/data/mods/public/simulation/helpers/InitGame.js
@@ -68,6 +68,9 @@
 
 		if (settings.PopulationCap)
 			cmpPlayer.SetMaxPopulation(settings.PopulationCap);
+
+		if (settings.AllyView)
+			Engine.QueryInterface(cmpPlayer.entity, IID_TechnologyManager)?.ResearchTechnology(cmpPlayer.template.SharedLosTech);
 	}
 	if (settings.WorldPopulationCap)
 		Engine.QueryInterface(SYSTEM_ENTITY, IID_PlayerManager).SetMaxWorldPopulation(settings.WorldPopulationCap);
Index: ps/trunk/source/tools/atlas/AtlasUI/ScenarioEditor/Sections/Map/Map.cpp
===================================================================
--- ps/trunk/source/tools/atlas/AtlasUI/ScenarioEditor/Sections/Map/Map.cpp
+++ ps/trunk/source/tools/atlas/AtlasUI/ScenarioEditor/Sections/Map/Map.cpp
@@ -39,6 +39,7 @@
 	ID_MapName,
 	ID_MapDescription,
 	ID_MapReveal,
+	ID_MapAlly,
 	ID_MapType,
 	ID_MapPreview,
 	ID_MapTeams,
@@ -169,6 +170,7 @@
 	gridSizer->Add(Tooltipped(new wxTextCtrl(this, ID_MapPreview, wxEmptyString),
 		_("Texture used for map preview")), wxSizerFlags().Expand());
 	CREATE_CHECKBOX(this, gridSizer, "Reveal map", "If checked, players won't need to explore", ID_MapReveal);
+	CREATE_CHECKBOX(this, gridSizer, "Ally view", "If checked, players will be able to see what their teammates see and won't need to research cartography", ID_MapAlly);
 	CREATE_CHECKBOX(this, gridSizer, "Lock teams", "If checked, teams will be locked", ID_MapTeams);
 	sizer->Add(gridSizer, wxSizerFlags().Expand());
 
@@ -233,6 +235,9 @@
 	// reveal map
 	wxDynamicCast(FindWindow(ID_MapReveal), wxCheckBox)->SetValue(wxString::FromUTF8(m_MapSettings["RevealMap"]) == "true");
 
+	// ally view
+	wxDynamicCast(FindWindow(ID_MapAlly), wxCheckBox)->SetValue(wxString::FromUTF8(m_MapSettings["AllyView"]) == "true");
+
 	// victory conditions
 	m_MapSettingsVictoryConditions.clear();
 	for (AtIter victoryCondition = m_MapSettings["VictoryConditions"]["item"]; victoryCondition.defined(); ++victoryCondition)
@@ -364,6 +369,9 @@
 	// reveal map
 	m_MapSettings.setBool("RevealMap", wxDynamicCast(FindWindow(ID_MapReveal), wxCheckBox)->GetValue());
 
+	// ally view
+	m_MapSettings.setBool("AllyView", wxDynamicCast(FindWindow(ID_MapAlly), wxCheckBox)->GetValue());
+
 	// victory conditions
 #define INSERT_VICTORY_CONDITION_CHECKBOX(name, ID) \
 	if (wxDynamicCast(FindWindow(ID), wxCheckBox)->GetValue()) \