Exchange ATI graphic card .

[necronomad]

I think I have the same or at least a similar problem (I'm guessing english isn't your first language). I purchased the game from steam however it has the same problem as mentioned. To illiterate:

The game boots, the intro movies show fine. Then the screen will go black, with the occasional flicker of color. I'm just guessing but it almost looks as though it is a messed up vertex buffer. No other game is having this problem.

In addition alt-tabbing out of the program and then back in will show the menu for a brief moment before reverting to the flickering colors. Oh and the music still plays and the buttons on the GUI still work (although I have to guess where they are).

What I've tried:
All drivers are updated.
I'm only running 1 monitor.
Changing the resolution and windowed mode in the game.ini file have no effect.

Any help would be very much appreciated.

Edit: Oh and my card is a HD4650 (yes its AGP)