Sky Render on 13 August 2008
Probably Solitaire, accounting for all games. I've won well over a hundred games of Solitaire on my mini-PC during the interims between classes (and sometimes during particularly boring classes).
Counting only "non-casual" games, I'd say Symphony of the Night. Not certain how many times I've gone through that game, but it's well over 20 now.
Sky Render - Sanity is for the weak.
