nightcraw1er.488: Its a toss up between:
GTA4 - brought full price, had to go through Cockstars help desk to get it to work, then it crashed after 5 mins and wasn't able to play it for years until recently with a crack, and then only for half an hour before i got really bored with the SA remake with slightly better draw distance.
Dark Souls - Totally the worst game ever, interface was so poor I spent half an hour trying to settings and such like. Graphics/story/combat all crap. Played for a half hour or so, then deleted, reinstalled some months later with a ton of mods, half hour and deleted - permanently this time.
Oh, and a passing mention to Halo 2, which not having Vista have never been able to play.
not playing it 10 minutes then going fuck it uninstalling the game and then ignoring you ever had it