P4-1.7, 256MB RAM, GeForce3 64MB
The CPU's OK but the RAM and vidcard are pretty pathetic these days. Yet the game runs more or less OK. Naturally, FPS at 1600x1200x32 with full details (which is what I use in AH1) totally blows, but I get about 30FPS at 1024x768x32 with full details. I can live with that.