I'm not sure I have a go-to game. Back in the day, it was likely StarCraft or Rainbow Six. My roommate and I would play against 6 AI in SC for fun, and for R6, I could get through nearly any level with just one operative and a pistol. I don't play games on my computer much anymore, don't really care for multiplayer in any game (though I enjoyed the Assassin's Creed multiplayer for it's innovation) and I've got a decent backlog of PS3 games to finish. I can always load up Batman: Arkham Asylum for some quick beat-em-up fun, so I guess that.