even though this never happens, i will once again for like the 8th time throw the odd names in to the hat for PC:
Quake 1 <- Duel/TDM/CTF
Quake 2 <- Duel/TDM/CTF
Quake 3 <- Duel/TDM/CTF
Quake 4 <- Duel/TDM/CTF
Quake Live <- Duel/TDM/CTF
Reflex <- Duel/TDM/CTF
Unreal Gold
Unreal Tournament <- Duel/TDM/CTF
Unreal Tournament 2004 <- Duel/TDM/CTF
Doom 3
Half-Life deathmatch
Half-Life 2 deathmatch
please for the love of god something that is arena style FPS duel, where you don't need a team
PC team games:
Left 4 Dead 2
Team Fortress Classic
Return to Castle Wolfenstien