OpenRA

http://www.youtube.com/watch?v=GkLBFDzqo9c In the game above, Microbit has abused this tactic successfully 5 out 8 attempts, using Light Tanks as the blockers. I have them marked by time. 3:35 - Ore Refinery 3:50 - Fail 4:55 - Fail 7:15 - Ore Refinery 7:30 - Ore Refinery and then Barracks 8:30 - War...