This game is not going to sell very well, at least not right away. While my computer is not a top of the line system, it's no slouch. I tried playing with all graphics set to medium. The framerate was almost unbearable. Setting all graphics to low gave good framerates but the game looked almost as bad as DukeNukem 3D.
Also had significant graphics flaws. Had horrible banding running across my screen. Yes I have the latest drivers.
Opteron 142 OC'ed to an FX55
1800xt 512mb pci
2gb ram