Call of Duty 4 is probably my favorite FPS. Good storyline and the modern gameplay makes it feel realistic.

Star Wars: Dark Forces 2. Play it.

I have 3 cause nothing is that simple for me.

Perfect Dark 64 is one of my favorites.  I loved 007 but Perfect Dark was the FPS that got me into FPS's.  I remember playing it for hours on end.  I loved looking at all my stats and seeing how far I ran and how much ammo I have used and how much pain I have dealt.  First FPS to record stats like that.  Even my dad had a character on that game......"The Keninator".  You can guess how creative my dad is. lol

Halo:CE is another favorite because it defined what a FPS should be.  It was the first gaming universe to pull me in and never let me go.  I am addicted to the Halo Universe and have yet to be dissapointed with any story I hear.  Some of my greatest gaming moments come from this game playing against my friends.  That was pure, good times.

Last but not least is COD:MW.  I will admit that COD 2 was actually the first FPS I ever played on the PC.  I know I know, where was I, did I grow up in a barn?  Maybe, but COD: MW really brought me into the PC FPS's.  I oculdn't stop playing it and I still can't.  Hard to decide which to play, Halo or COD.  Some really great times with MW as well.

Tough quest, I do however liked the quake world team fortress game, you could do so much with it.

the new one is alright but old quake world teamfortress is god.

easy....golden eye

Of course GoldenEye 007 is my favorite fps of all time. It was an excellent game and it set the stage for all first person shooters to come. I still really enjoy it to this day and I have also had a lot of great times with my siblings in this game. Jaws all the way.

Second would be Call of Duty: World at War (DS) for me, followed by Halo 2 (Xbox).

I'd probably go with Counter-Strike for the PC.

My favorite one? Half Life.

My favorite FPS series is most definitely the Halo series and also I like the F.E.A.R. series.

Firstly kudos to Ric White for Time Splitters, one of my FAVORITE franchises and I cannot wait for a fourth game. But my favorite FPS of all time is either

1. Duke Nukem 3D

or

2. Half-Life

Left 4 Dead. i love guns and I love zombies.

Aaaah it would have to be a three way tie for me.The halo series even though im seriously burned out on it and wont play it.Bioshock or Modern warfare.

Halo or Bioshock, period. All else is a copy of such awesomeness.

any thing made by valve, infinity ward, or bungie

GodenEye 007 is the best.