What is your favorite FPS?

Tribes, flat out one of the best multiplayer FPS games ever. There is nothing better than skiing down a hill with your jetpack then using an adjacent hill as a ramp to convert all of your downward momentum unto a super high jet-pack assisted jump where you launch a spinning disk of plasma into an unaware player's face.

Battlefield 2 is my love, though I'm not a fan of FPS genre.

Surely Day of Defeat.

Counter Strike: Source :)

Quake 2

Am I the first to say Prey? That's for singleplayer at least. Multiplayer is a whole different category that hardly compares to SP.

Starsiege Tribes!!!!

prey was alot of fun, metro 2033 was ok got a little boring later on CALL OF DUTY WAS THE FIRST FPS (troll mode deactivated) i really like tf2 section 8 prejudice is alot of fun soo many i really cant decide

Counter-Strike 1.5/1.6 was my love for 7 years.

i really dislike cs even when it came out it's just not fun imo

maybe if cs2 came out

TF2.

I liked the two Max Payne games... other then that the closest thing to a shooter I've ever played and liked was Thief 1 which isn't very similar at all. Probably the one genre in which I've never really understood the appeal of it.
Well, I suppose Max Payne isn't a FPS either but it is a shooter which still makes it unique among games I've liked.

I loved the demo of Sanction

Deus Ex. FPS/RPG if it counts. Played it for the first time around a month ago and needless to say it is now my favorite game of all.

No one has mentioned the Half Life series?

All of you. Get out.

In order of favortism
Half-Life 2 + Eps.
S.T.A.L.K.E.R. series
Team Fortress 2 (before it went to hell with that hat nonsense)
POrtal (1)
Ace of Spades
Mount and Blade (if it counts)
Metro 2033 (felt better with the Ranger dlc, makes it feel like Stalker)
Aliens Versus Predator 2000
Quake 3 Arena

• Counter-Strike
• Battlefield: Bad Company 2

I'm so exited about Battlefield 3... but I need a new pc :P

I really like soldier of fortune! I like to cheat and go around killing bad guys:) it is gory though.

Valve All the way

Half-Life Series
Counter-Strike
Team Fortress 2

CoD 2

Battlefield 3 thumbs up if you agree.....wait.

Imma say Deus Ex, most Valve games (HL, TF2, CS, L4D), Red Orchestra, Medal of Honor AA, some other ones I forgot to name and SWBFII.

Max payne

Doom, one of the most earliest games I've played then Wolfenstein, anything else merely just improves from the fathers of fps :P

No offense Guys XP

A pretty close tie between Battlefield 1942 and Battlefield 2.

I also absolutely love the combat mechanics of Day of Defeat Classic, although the outdated graphics put of off from playing it still in 2011.