I'm having a really strange problem and can't get this game to work.
I have been playing many game including Crysis, Just Cause 2 and Empire: Total War with no issues so far (I have an ATI Radeon HD 5770)
But every time I launch this game, the screen goes black, and then I get a message saying 'Input Not Supported'...
My screen resolution is 1280x1024, but no matter what I do, the game just won't show on my monitor.
Any ideas why?
Nevermind, I managed to solve the problem eventually.
Just in case anyone else has this issue, I solved it by:
-Right clicking 'Alien Swarm' on steam and going on 'Properties'
-Then 'Set Launch Option'
-Typed '-sw' (without the ' ') so it starts in windowed mode
-Then from there, I changed the display option to my resolution through the game menu.
I know for many this would of been the obvious thing to do, but I'll mention it anyway.