So I purchased Crysis 2 on a Steam Sale and am having issues logging in to play Multiplayer. I haven't been able to login yet, it always gives me the same message saying my Login details are incorrect. I created the account on gamesas.com and everything matches up, but the game refuses to let me login. How can I fix this?

I've just been having the same problem. Make sure you don't have any symbols in you password. Try changing your username to not have any capital letters.

EDIT: or just try changing your username. Not sure which one made it work for me but Crysis wasn't letting me enter symbols in my password.