The Devil in Ninja Gaiden for the Xbox. Now, it wouldn't be so bad, if it weren't for the fact that you have to fight two mini bosses with crazy amounts of health (the only way to so much as scratch them is to use your most powerful attacks, and even then it takes a lifetime), and go two rounds against enemies in an arena (during one of which the Devil is throwing fireballs at you from off-screen, which you cannot see), and THEN you have to fight him.
Oh, and all of this is after climbing a spire full of cheap enemies and ghost fish. I hate ghost fish.
Oh, and all of this is after climbing a spire full of cheap enemies and ghost fish. I hate ghost fish.