In no particular order....
Day of Defeat
Counterstrike
Dark Forces 2 : Jedi Knight
Star Trek Elite Force
Infiltration for UT
Tactical Ops for UT
Urban Terror for Quake 3
Operation Flashpoint
Max Payne (Even though I havent played it yet I know it's great)
In the near future....
MoH:AA
Jedi Outcast : Jedi Knight 2
RtCW
Hidden and Dangerous 2
BattleField 1942
Soldier of Fortune 2
Global Operations
Star Wars : Galaxies
Star Wars : Knights of the Old Republic
and thats about it, hehe.
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Blessed be the Lord my strength, which teacheth my hands to War and my fingers to fight.