diff --git a/OpenRA.Game/Network/Session.cs b/OpenRA.Game/Network/Session.cs
index e452f09a07..a9601b338b 100644
--- a/OpenRA.Game/Network/Session.cs
+++ b/OpenRA.Game/Network/Session.cs
@@ -196,6 +196,7 @@ namespace OpenRA.Network
 			public bool ShortGame = true;
 			public bool AllowVersionMismatch;
 			public string GameUid;
+			public bool DisableSingleplayer;
 
 			public static Global Deserialize(MiniYaml data)
 			{
diff --git a/OpenRA.Game/Server/Server.cs b/OpenRA.Game/Server/Server.cs
index cc7640f373..fca8bc6b1c 100644
--- a/OpenRA.Game/Server/Server.cs
+++ b/OpenRA.Game/Server/Server.cs
@@ -148,7 +148,8 @@ namespace OpenRA.Server
 					RandomSeed = randomSeed,
 					Map = settings.Map,
 					ServerName = settings.Name,
-					Dedicated = settings.Dedicated
+					Dedicated = settings.Dedicated,
+					DisableSingleplayer = settings.DisableSinglePlayer,
 				}
 			};
 
@@ -395,8 +396,8 @@ namespace OpenRA.Server
 				if (Map.RuleDefinitions.Any() && !LobbyInfo.IsSinglePlayer)
 					SendOrderTo(newConn, "Message", "This map contains custom rules. Game experience may change.");
 
-				if (Settings.LockBots)
-					SendOrderTo(newConn, "Message", "Bots have been disabled on this server.");
+				if (Settings.DisableSinglePlayer)
+					SendOrderTo(newConn, "Message", "Singleplayer games have been disabled on this server.");
 				else if (MapPlayers.Players.Where(p => p.Value.Playable).All(p => !p.Value.AllowBots))
 					SendOrderTo(newConn, "Message", "Bots have been disabled on this map.");
 
diff --git a/OpenRA.Game/Settings.cs b/OpenRA.Game/Settings.cs
index 7a46459fd9..57b18c896b 100644
--- a/OpenRA.Game/Settings.cs
+++ b/OpenRA.Game/Settings.cs
@@ -70,8 +70,8 @@ namespace OpenRA
 		[Desc("Automatically restart when a game ends. Disable this when something else already takes care about it.")]
 		public bool DedicatedLoop = true;
 
-		[Desc("Disallow AI bots.")]
-		public bool LockBots = false;
+		[Desc("Disallow games where only one player plays with bots.")]
+		public bool DisableSinglePlayer = false;
 
 		public string TimestampFormat = "s";
 
diff --git a/OpenRA.Mods.Common/ServerTraits/LobbyCommands.cs b/OpenRA.Mods.Common/ServerTraits/LobbyCommands.cs
index 86dc76dfb8..065ee7a850 100644
--- a/OpenRA.Mods.Common/ServerTraits/LobbyCommands.cs
+++ b/OpenRA.Mods.Common/ServerTraits/LobbyCommands.cs
@@ -67,6 +67,10 @@ namespace OpenRA.Mods.Common.Server
 			if (server.LobbyInfo.Slots.Any(sl => sl.Value.Required && server.LobbyInfo.ClientInSlot(sl.Key) == null))
 				return;
 
+			// Does server have only one player?
+			if (server.Settings.DisableSinglePlayer && playerClients.Count() == 1)
+				return;
+
 			server.StartGame();
 		}
 
@@ -115,6 +119,13 @@ namespace OpenRA.Mods.Common.Server
 							return true;
 						}
 
+						if (server.Settings.DisableSinglePlayer &&
+							server.LobbyInfo.Clients.Where(c => c.Bot == null && c.Slot != null).Count() == 1)
+						{
+							server.SendOrderTo(conn, "Message", "Unable to start the game until another player joins.");
+							return true;
+						}
+
 						server.StartGame();
 						return true;
 					}
@@ -373,8 +384,8 @@ namespace OpenRA.Mods.Common.Server
 						if (server.Map.RuleDefinitions.Any())
 							server.SendMessage("This map contains custom rules. Game experience may change.");
 
-						if (server.Settings.LockBots)
-							server.SendMessage("Bots have been disabled on this server.");
+						if (server.Settings.DisableSinglePlayer)
+							server.SendMessage("Singleplayer games have been disabled on this server.");
 						else if (server.MapPlayers.Players.Where(p => p.Value.Playable).All(p => !p.Value.AllowBots))
 							server.SendMessage("Bots have been disabled on this map.");
 
@@ -923,8 +934,6 @@ namespace OpenRA.Mods.Common.Server
 		static Session.Slot MakeSlotFromPlayerReference(PlayerReference pr)
 		{
 			if (!pr.Playable) return null;
-			if (Game.Settings.Server.LockBots)
-				pr.AllowBots = false;
 			return new Session.Slot
 			{
 				PlayerReference = pr.Name,
diff --git a/OpenRA.Mods.Common/Widgets/Logic/Lobby/LobbyLogic.cs b/OpenRA.Mods.Common/Widgets/Logic/Lobby/LobbyLogic.cs
index 20061830f4..65f40d5e5c 100644
--- a/OpenRA.Mods.Common/Widgets/Logic/Lobby/LobbyLogic.cs
+++ b/OpenRA.Mods.Common/Widgets/Logic/Lobby/LobbyLogic.cs
@@ -318,7 +318,8 @@ namespace OpenRA.Mods.Common.Widgets.Logic
 			if (startGameButton != null)
 			{
 				startGameButton.IsDisabled = () => configurationDisabled() || Map.RuleStatus != MapRuleStatus.Cached ||
-					orderManager.LobbyInfo.Slots.Any(sl => sl.Value.Required && orderManager.LobbyInfo.ClientInSlot(sl.Key) == null);
+					orderManager.LobbyInfo.Slots.Any(sl => sl.Value.Required && orderManager.LobbyInfo.ClientInSlot(sl.Key) == null) ||
+					(orderManager.LobbyInfo.GlobalSettings.DisableSingleplayer && orderManager.LobbyInfo.IsSinglePlayer);
 				startGameButton.OnClick = () =>
 				{
 					// Bots and admins don't count