Everything. I get shriekingly angry at every single game I play, at anything that doesn't go completely right. I don't know why I play anything; there's more pain than joy. But the most frustrating would probably be (currently) would be GH3; I screw up too much.
One older PC game, called Reading Galaxy or something, was very cruel. You'd play rounds of puzzles and accumulate money as you won (and they weren't easy (the rounds)). If you lost at the end of all the rounds, a little animation would follow showing a large safe containing all your hard-earned money being moved over a huge pit of fire, which would proceed to dump and incinerate all your cash.
Okami
To lavish praise upon this title, the assumption of a common plateau between player and game must be made. I won't open my unworthy mouth.
