Officially deprecate this function.

OpenRA.Mods.Common/Scripting/Global/MapGlobal.cs

@@ -9,6 +9,7 @@
  */
 #endregion
 
+using System;
 using System.Linq;
 using Eluant;
 using OpenRA.Mods.Common.Traits;
@@ -49,13 +50,15 @@ namespace OpenRA.Mods.Common.Scripting
 			return FilteredObjects(actors, filter).ToArray();
 		}
 
-		// HACK: This api method abuses the coordinate system, and should be removed
+		// HACK: This API method abuses the coordinate system, and should be removed
 		// in favour of proper actor queries.  See #8549.
+		[Obsolete("This function will be removed in future versions. Use Map.ActorsInWorld instead.")]
 		[Desc("Returns the location of the top-left corner of the map (assuming zero terrain height).")]
 		public WPos TopLeft => Context.World.Map.ProjectedTopLeft;
 
-		// HACK: This api method abuses the coordinate system, and should be removed
+		// HACK: This API method abuses the coordinate system, and should be removed
 		// in favour of proper actor queries.  See #8549.
+		[Obsolete("This function will be removed in future versions. Use Map.ActorsInWorld instead.")]
 		[Desc("Returns the location of the bottom-right corner of the map (assuming zero terrain height).")]
 		public WPos BottomRight => Context.World.Map.ProjectedBottomRight;
 

mods/ra/maps/soviet-05/map.yaml

@@ -558,9 +558,12 @@ Actors:
 	USSRlstPoint: waypoint
 		Location: 48,83
 		Owner: Neutral
-	CFBPoint: waypoint
+	BaseRectBR: waypoint
 		Location: 42,90
 		Owner: Neutral
+	BaseRectTL: waypoint
+		Location: 20,42
+		Owner: Neutral
 	GreeceBasePoint: waypoint
 		Location: 69,46
 		Owner: Neutral

mods/ra/maps/soviet-05/soviet05.lua

@@ -8,8 +8,8 @@
 ]]
 
 CheckForBase = function()
-	local baseBuildings = Map.ActorsInBox(Map.TopLeft, CFBPoint.CenterPosition, function(actor)
-		return actor.Type == "fact" or actor.Type == "powr"
+	local baseBuildings = Map.ActorsInBox(BaseRectTL.CenterPosition, BaseRectBR.CenterPosition, function(actor)
+		return (actor.Type == "fact" or actor.Type == "powr") and actor.Owner == player
 	end)
 
 	return #baseBuildings >= 2