Index: binaries/data/mods/public/gui/gamesettings/attributes/TeamPlacement.js
===================================================================
--- binaries/data/mods/public/gui/gamesettings/attributes/TeamPlacement.js
+++ binaries/data/mods/public/gui/gamesettings/attributes/TeamPlacement.js
@@ -57,6 +57,11 @@
 		"Name": translateWithContext("team placement", "Circle"),
 		"Description": translate("Allied players are grouped and placed with opposing players on one circle spanning the map.")
 	},
+	{
+		"Id": "tight_arc",
+		"Name": translateWithContext("team placement", "Tight Arc"),
+		"Description": translate("Allied players are grouped closely together equidistant to opposing teams.")
+	},
 	{
 		"Id": "line",
 		"Name": translateWithContext("team placement", "Line"),
Index: binaries/data/mods/public/maps/random/mainland.js
===================================================================
--- binaries/data/mods/public/maps/random/mainland.js
+++ binaries/data/mods/public/maps/random/mainland.js
@@ -55,7 +55,7 @@
 var clBaseResource = g_Map.createTileClass();
 
 placePlayerBases({
-	"PlayerPlacement": playerPlacementCircle(fractionToTiles(0.35)),
+	"PlayerPlacement": g_MapSettings.TeamPlacement == "radial" ? playerPlacementCircle(fractionToTiles(0.35)) : [sortAllPlayers(), ...playerPlacementMultiArcs(fractionToTiles(0.35), 0, 0.75)],
 	"PlayerTileClass": clPlayer,
 	"BaseResourceClass": clBaseResource,
 	"CityPatch": {
@@ -81,6 +81,7 @@
 		"template": aGrassShort
 	}
 });
+
 Engine.SetProgress(20);
 
 createBumps(avoidClasses(clPlayer, 20));
Index: binaries/data/mods/public/maps/random/mainland.json
===================================================================
--- binaries/data/mods/public/maps/random/mainland.json
+++ binaries/data/mods/public/maps/random/mainland.json
@@ -6,6 +6,7 @@
 		"Preview" : "mainland.png",
 		"Keywords": ["multiplayer"],
 		"SupportedBiomes": "generic/",
-		"CircularMap" : true
+		"CircularMap" : true,
+		"TeamPlacements": ["radial", "tight_arc"]
 	}
 }
Index: binaries/data/mods/public/maps/random/rmgen-common/player.js
===================================================================
--- binaries/data/mods/public/maps/random/rmgen-common/player.js
+++ binaries/data/mods/public/maps/random/rmgen-common/player.js
@@ -843,3 +843,78 @@
 
 	return [playerIDs, startLocations];
 }
+
+/**
+ * Place on an arc on a circle, 1 arc per team. Each team member is on the same arc.
+ * @param {Array[int]} playerIDs
+ * @param {float} center
+ * @param {float} radius
+ * @param {float} mapAngle
+ * @param {float} teamGapRatio Ratio difference between team gap and players on the same team Should be 0 to 1.
+ * e.g. 0.8 means the ratio team gap:team player gap is 8:2. n.b. < 0.5 means enemies are closer
+ * than team members are to each other
+ */
+function playerPlacementMultiArcs(radius, mapAngle, teamGapFrac) {
+	var playerIDs = sortAllPlayers();
+	let playerTeams = playerIDs.map(getPlayerTeam);
+	let uniqueTeams = new Set(playerTeams);
+	let nTeams = uniqueTeams.size;
+	let nPlayers = playerIDs.length;
+
+	let teamIntMap = {};
+	let teamFreqPlayers = {};
+	let teamPlayersIntMap = {};
+
+	// Shuffle team order.
+	let teamShuffle = function(length) {
+		let i = 0;
+		let array = Array.from(Array(length), () => i++);
+			for(let i = array.length - 1; i > 0; i--){
+				const j = Math.round(Math.random() * (array.length-1))
+				const temp = array[i]
+				array[i] = array[j]
+				array[j] = temp
+		}
+		return array;
+	}(nTeams);
+
+	// Team to array (random) index map.
+	Array.from(uniqueTeams).map((val, i) => {teamIntMap[val] = teamShuffle[i];});
+	// Player frequency in teams.
+	playerTeams.map((v) => teamFreqPlayers[v] ? teamFreqPlayers[v] += 1 : teamFreqPlayers[v] = 1);
+	// Team player int map. This is useful when positioning players on a team.
+	Array.from(uniqueTeams).map((val) => {teamPlayersIntMap[val] = 0;});
+
+	// I don't know at this point. Trust my brain. It's smarter than my brain.
+	// Something-something add the previous team player combos.
+	// It's some kind of "cumulative frequency" of player teams idk.
+	for (let key in teamPlayersIntMap) {
+		if (teamPlayersIntMap.hasOwnProperty(key)) {
+			for (let key2 in teamPlayersIntMap) {
+				if (teamPlayersIntMap.hasOwnProperty(key)) {
+					if (teamIntMap[key2] > teamIntMap[key]) {
+						teamPlayersIntMap[key2] += teamFreqPlayers[key]-1;
+					}
+				}
+			}
+		}
+	}
+
+	const teamPlayerGapFrac = 1 - teamGapFrac;
+
+	const totalGapCount = teamGapFrac*nTeams + teamPlayerGapFrac*(nPlayers-nTeams);
+
+	const teamGapAngle = 2*Math.PI*teamGapFrac/totalGapCount;
+	const teamPlayerGapAngle = 2*Math.PI*teamPlayerGapFrac/totalGapCount;
+
+
+	function playerAngle(i) {
+
+		return mapAngle + teamGapAngle*teamIntMap[playerTeams[i]] + teamPlayerGapAngle*((teamPlayersIntMap[playerTeams[i]]++));
+	}
+
+	return playerPlacementCustomAngle(
+		radius,
+		g_Map.getCenter(),
+		playerAngle);
+}