Xbox 360 controller not working on PC
 

I heard that the PC version of the game supports Xbox 360 controller, but for some reason it won't work.

When I plug in the controller, it doesn't read it at all. If the controller's plugged in before I start the game, the game won't open.

I'd really rather play with a controller and I'm not sure why it's not working. Is there any way I can get the controller to work?