When I start the games (Poker night 2 and The Walking Dead) I only got the sounds but without the pictures,
I got a good desktop computer: Intel i5 Core 3.20 GHz, Gtx 650 CD-Series Graphics Card 16Gb RAM and WIndows 7 64 bits
and all the drivers are up to date.
I already tried to verify integrity of game files and Re-download the game but I still have this problem.
I already contected the Steam Support but their guides didn't helped me :/