1. Deus Ex
2. Half-Life 2
3. Call of Duty 2
4. FEAR
5. Unreal Tournament
6. Battlefield 2
7. Killzone 2
8. Crysis
9. The Darkness
10. Quake II

1. Counter Strike 1.3 - 1.6
2. FrontLine Force (HL mod)
3. Half-Life
4. Unreal Tournament
5. Half-Life 2
6. Serious Sam: The First Encounter
7. Quake 3 Arena
8. Day of Defeat
9. Aliens vs Predator 2
10. Unreal Tournament 2004

Honorable mention:
-Call of Duty 2
-Medal of Honor: Allied Assault

Something like this I guess

I haven't played a wide variety of FPS, but the ones I've played, I've played a lot. I have sunk a lot of hours into these nine games.

1. Perfect Dark
2. GoldenEye 007
3. Halo 2
4. Halo: Combat Evolved
5. James Bond 007: Nightfire (tie)
5. Halo 3 (tie)
7. XIII (tie)
7. Timesplitters 2 (tie)
9. Doom II

To get to ten, I have to include another game. I only played my brother's copy for a few hours. I didn't like what I saw, but I'm open to giving this one another chance.

10. Call of Duty: World at War

I love how the console tards add Halo on their list when gamers who've played a decent FPS on the PC before Halo haven't even placed it on theirs.

1. Enemy Territory: Quake Wars
2. Return to Castle Wolfenstein
3. Dark Forces II: Jedi Knight
4. Dark Forces
5. Far Cry 2
6. S.T.A.L.K.E.R.
7. Jedi Knight II: Jedi Outcast
8. Bioshock
9. Halo 3
10. Unreal

this is my list:

1. COD 4
2. Killzone 2
3. Halo: Combat Evolved
4. Goldeneye 007
5. Bioshock
6. Halo 3
7. Halo 2
8. COD WAW
9. Half Life 2
10. Left 4 Dead

Who's alt account are you?

Hmm not enough Killzone 2 love.

i agree with u...i wish more people had played that game to know how good it truly is

p.s. to those who are planning to buy this in the future: BEWARE OF RICO!