[H]Garry's Mod/Serious Sam 3/NS2/Mark of the Ninja/Mirror's Edge/SPAZ [W]F.E.A.R. 1/Dirt 2

Steam:
Mark of the Ninja Steam Key,
Space Pirates and Zombies (Humble Weekly Sale),
Mirror's Edge Steam Key,
Natural Selection 2 (Humble Jumbo Bundle),
Serious Sam 3 (Humble Jumbo Bundle),
Garry's Mod (Humble Jumbo Bundle)