J T wrote:If I think about the games that I've dunked the most hours into, they would be Wolfenstein, Doom, Doom II, Doom 64, Goldeneye, Turok 1 & 2, Halo 1 & 2, Half-Life 2, Left 4 Dead.
If I want to add some interesting ones that aren't in people's lists yet and also are not your typical military/space marine games, I would say...
Zeno Clash (PC/Xbox Live)
Vampire: The Masquerade- Bloodlines (PC)
Peter Jackson's King Kong (multiplatform)
Dark Watch (which was mentioned earlier, but is great fun) (PS2, Xbox)
Aliens VS Predator (2000, PC)
Prey (Multiplatform)
No On Lives Forever (PC)
No one lives forever

I like the FPS genre but this is like a genre where nothing really stands out for me. I remembered Wolfenstein: Enemy Territory being especially good though.