Hi, first to post I want to give you a magnific congratulation for this game!
I only have a suggestion. That is, maybe you only can sell units since minute X. Some players make mass terran without make Tier 2, and when you go to counter this measure with colossus or something like that, they sell all units saving 70% of their money and make tier 2 or 3 to attack from air. Keep at Tier 1 in minute 5 it's not a acchivement, stay until minute 15 at tier 1 to save 70% its a good resistance.
Subject: Selling Time 
Mon Aug 15, 2011 1:35 am