Tomb Raider, Portal(s), Assassin's Creed(s), Outlast, Skyrim, Far Cry 3, Minecraft, Steet Fighter X Tekken, Dirt 3, Kerbal Space Program, Batman Arkham Origins, Prototype 2, Warframe, BF3/4, and oddly enough, Geometry Wars 2...
Those plus Guild Wars 2 fills every nook and cranny of my "free time"