When I try to play, I get the "Preparing to Launch" screen for a few seconds and it just dissapears and never launches. I have tried clicking the .exe directly, same result. No error messages ever pop up. I have been able to play this game on this machine before, I can't figure out the problem. Yes, I have tried disable AV/Firewall.
Specs: Windows 8.1 16 GB RAM i7 3770 @ 3.4 GHz 1 GB GTX 560 ti