Hmm thats a tough one I got a few
Half Life 2
Half Life 2
eath Match
Counter Strike Source
Counter Strike 1.6
Day of Defeat: Source
Team Fortress Classic
Half Life
FEAR
Battlefield 2
World of Warcraft
Ultmia Online
Black and White
Black and white 2
Stronghold: crusader
Stronghold 2
Command and conquer red alert 2
Command and conquer red alert
command and conquer tiberian sun
command and conquer generals
command and conquer
Quake 4
Need for speed carbon
Diablo 2
Dungeon Siege
Warcraft 3
Starcraft
Halo
Geometry Wars
Return to Castle Wolfenstein
Solider of Fortune
and about 25 - 30 dos games includeing Kings Quest, Duke 3d, Doom 1 & 2, about 9 different D&D games, Space Quest, Dungeon Master(still play to this day)
Just too many to list Maybe one day ill setup xfire and have them listed