Steam:
The Orange Box
Gmod 10
L4D
Non Steam;
Oni
World In Conflict
Far Cry 2
Mirrors Edge
Empire : Total War
Medieval Total War
Medieval: Total War Kingdoms
Spore
Kings Quest Mask of Enternity
Battlefront 2
Neverwinter Nights 1 & 2
Kotor
And others i can remeber
Kotor was awesome, i never beat it, but it was awesome.