This is for the Steam version.
I played Episode 1 when it was released without any problems. Now I want to play Episode 2 but the right after I click on 'Play' I see a completely black screen, my big in-game mouse cursor and I can hear birds twitter in the background. That's all, there is nothing else I can do except to Alt+Tab out of the game and kill the process.
Is this a known problems? What can I do about it?