The half life series is very good. Also the call of duty series. Also, return to castle wolfenstein is a very good shooter, but as solid snake already mentioned, the population is dwindling for that game, but fun nonetheless.
Medal of Honor: Spearhead, great multiplayer.
SOF2, just great.
Global Opreations, cant get enough.
Americas Army, good tatical shotter.
Unreal 2004, Fun instant matches.
Codename Eagle, old but classic.
Edit: Battlefront 2, one of the best games ever.
My crime is that of curiosity. My crime is that of judging people by what they say and think, not what they look like. My crime is that of outsmarting you, something that you will never forgive me for.
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