I bought Global Agenda recently and now have six so-called Coupon Codes for Global Agenda. So what can you do with them?
Well, if you decide to buy the game (there's a free trial of course) and put in one of those codes you'll get the game 30% cheaper from the official website (http://www.globalagendagame.com/thegame_shop.html) which is a nice deal in my opinion.
Here are the codes. The codes can be used only once though, so if you're getting an error try another one.