I was just about to say this.

YES! Dawn of War is a fantastic game that deserves to be mentioned at every possible opportunity.

On PC. I had to download a save from some forum to get past a certain game-breaking bug. Still one of my favourite games, this thread makes me want to replay it again.

Dungeon Keeper, I've still got that disc laying around somewhere.

The first Diablo. Man that game had great satanic atmosphere.

To add to the guys recommending Diablo. "Diablo" tanslates directly to "Devil" or "Demon." It doesn't get more Satanic than that.

First place I've ever seen anyone say Dante's Inferno looks like a good game. The game wasted awesome source material. Plus EA's whole "Sin to Win" contest that involved sixualy assualting women, and the fake protests. I think EA's goal was to drag the gaming industry down so low with this game premotion that they could feel closer to their inspiration for the game.

I also would like to add Oblivion to the list.

I got Shadow Warrior from the Steam sale, that has a lot of oriental demon slaying. In first person. With a katana. And guns, but what's the fun in that?

Really, it's fun, old-school FPS. And it has quicksaving I though it was illegal to have that in games nowadays