:(I was having the same issue. I know they usually tell you that you need to use the most current drivers with games however I tried everything outside of formatting my machine and had no luck. I read a few posts and read that some people where having issues with 9.0 Catalyst drivers. I decided to remove all previous drivers from my computer, after doing so I installed the drivers that came with my ATI 8870. This driver version is 12-099 (8.53).Then I rebooted my computer and the game started fine. I have not had any further issues with the game not starting. Just in case you were wondering,before I made this change, multiplayer would start but Single player would not I hope this helps you.:thumbup: