Index: binaries/data/mods/public/gui/campaigns/default_menu/CampaignMenu.js
===================================================================
--- binaries/data/mods/public/gui/campaigns/default_menu/CampaignMenu.js
+++ binaries/data/mods/public/gui/campaigns/default_menu/CampaignMenu.js
@@ -36,11 +36,11 @@
 
 	startScenario()
 	{
-		let level = this.getSelectedLevelData();
+		const level = this.getSelectedLevelData();
 		if (!meetsRequirements(this.run, level))
 			return;
 
-		let settings = {
+		const settings = {
 			"mapType": level.MapType,
 			"map": "maps/" + level.Map,
 			"settings": {
@@ -52,15 +52,32 @@
 				"data": this.run.data
 			}
 		};
-		let assignments = {
+		const assignments = {
 			"local": {
 				"player": 1,
 				"name": Engine.ConfigDB_GetValue("user", "playername.singleplayer") || Engine.GetSystemUsername()
 			}
 		};
 
-		let gameSettings = new GameSettings().init();
+		const gameSettings = new GameSettings().init();
 		gameSettings.fromInitAttributes(settings);
+
+		if (level.AI)
+		{
+			// Setup AI on the non-human players.
+			for (let i = 1; i < gameSettings.playerCount.nbPlayers; ++i)
+			{
+				const bot = {
+					"bot": g_Settings.PlayerDefaults[i + 1].AI,
+					"difficulty": +Engine.ConfigDB_GetValue("user", "gui.gamesetup.aidifficulty"),
+					"behavior": Engine.ConfigDB_GetValue("user", "gui.gamesetup.aibehavior"),
+				};
+				if (typeof level.AI === "string")
+					bot.bot = level.AI;
+				gameSettings.playerAI.set(i, bot);
+			}
+		}
+
 		if (level.Preview)
 			gameSettings.mapPreview.setCustom("cropped:" + 400/512 + "," + 300/512 + ":" + level.Preview);
 		gameSettings.mapName.set(this.getLevelName(level));