Just started PC gaming so it's not as many as some but it gets me by.
Only one rig, and they're all installed:
WoW (The first 3 I bought in some bundle and didn't care for them)
Warframe
DC Universe Online
Blood Line Champions
Little Inferno
Vindictus (F2P and IMO it's really good)
Spiral Knights
Team Fortress 2
Arma 2 (Just the original with none of the other add-ons)
Minecraft/FTB/Technic
Left 4 Dead
Left 4 Dead 2
Trine 2
Limbo
Hitman Absolution
Bioshock Infinite
Dishonored
Dragon Age Origins w/all DLC (Was like 8 bucks, Gotta love STEAM)
Half Life 2+ Highrez TP
Half Life 2 Lost Coast
Half Life 2 Episode 1
Half Life 2 Episode 2
Portal
Portal 2
Far Cry 2
Far Cry Blood Dragon
Call of Duty MW2
Call of Duty MW3
Call of Duty Black Ops 2
Dead Island Riptide
Metro Last Light (Unplayable due to stuttering BS)
Borderlands 2