I downloaded the demo last night. I was playing the tutorial, then my screen went black. It seems like it lost connection with my video card. I turned off my computer for about ten minutes, turned it back on and it worked fine. This sounds like my video card is overheating, however it only does it with this game. I have tested it out on many other games (Half-life 2, team-fortress 2, The guild 2, bioshock, Hitman blood money, etc..) and it does not shut off. Anyone else have the problem?

-Thanks