Tip: If you play it using an 8800GTS, be sure to put texture and shading to HIGH settings or the game won't work effectively. There are certain settings that may need to be on LOW as well for certain effects such as flashlights to not screw up.

I played it using 1680x1050, an 8800GTS (320MB), 2GB RAM, XP and a mixture of HIGH, MEDIUM and LOW settings and got the game going fine. It's very good. I mean, it's freaking gorgeous. I really, really like it.