Best FPS game you have played

battlefield 3 :P

single player: Half life.
multiplayer: Unreal tournament.

CS!

Half Life series for solo

UT for multiplayer

Red Faction: Armageddon was pretty cool.

Mafia I and Assassians Creed:)

The best in my book will always be Clive Barker's Unying.
Loved that game so much.

Borderland, CounterStrike 1.6, Unreal Tournament (of course), Battlefield 2 (haven't got a chance to play the third one T.T)

Doom, Duke Nukem 3D, Battlefield series, CS

Team fortress 2 hands down. but lets say for single player I would have to say the battlefield series. (their campaign is much more polished and better than most other FPS games I have seen.)

Half-life 2, far cry

TF2

bf3

Ok well on pc its Counter Strike
On Xbox Halo
But Halo is the best fps ever.

Glad to see a fair share of BF3 supporters here.

Perfect Dark on the Nintendo 64!

TF2 and every other game made by Valve.

Team Fortress 2 \o/

HL, HL2+Episodes, BioShock and Halo: Combat Evolved (the only Halo I could play since I don't have an X360, but I'd love to see the end of the saga)

Prey

battle field counter strike and call of duty although its crap these days

Serious Sam 1,2,HD,3 ; Doom 1,2,3 ; Duke Nukem 3D ; TF2 ; Half Life 1,Opposing Force,Blue Shift,2,Ep1,Ep2

Call Of Duty 4: Modern Warfare

Wolfenstein 3D, Doom, Doom 2, Heretic, Blake Stone, Duke Nukem 3D, Star Wars Dark Forces, Quake II

Counter-Strike Condition Zero, Battlefield 2, Team Fortress 2

halo 2