Yes i have played it . .it doesn't look good .
Plug in the XBox 360 Controller into the PC start the Co-op mode. .
First press any button on the controller and next press space-bar to initiate the second player. .
But i have to tell you that it sux big time cause it happens in Split screen and that too a vertical split which reduces the viewing area a lot and makes it very difficult to play. .
It is good only if you have a big screen [ preferably wide screen] and a good graphics card so you can play it at a good resolution for more viewing area !!!