Hmmm, a lot. Starcraft + Broodwar/ Warcraft III + Frozen throne, HAWX, Endwar, Supreme Commander, RA3, Crysis: Wars, Call of Duty 4, CoD4 W@W, WoW, EVE Online, Voyage Century, Team Fortress 2, CS: Source, CS: 1.5, Sacred 2, Quake Wars, Battlezone 2, Battlezone 1 + Red Odyssey, AoEIII, UT3, UT2004, Killing Floor, Battlefield 2, and Vegas 2.
Those are just the online ones I play. WAHAHAHAHA