The US version of Ninja Gaiden 3 (NES), you take twice as much damage as in the other versions. And it's a Ninja Gaiden game. And you don't get infinite continues. Have a lot of fun, you insane masochist.gamezombieghgh said:I've heard Ninja Gaiden 2 is very very difficult
Edit: I'd like to take this time to point out all of Rareware's Nintendo 64 collect-a-thons: Banjo-Kazooie, Banjo-Tooie and Donkey Kong 64. The actual games aren't too bad, except for a few boss fights, but at first the amount of stuff in the games can be somewhat overbearing, particularly with that last one. Also, you WILL need a pen-and-paper for Banjo-Kazooie. Take notes of everything you see and everything you're told. And beat it before the second one. And keep all your notes.
Edit 2: Pokemon HG/SS has a large number of sadistic bosses (i.e. all the Johto gym leaders), the wild Pokemon are underleveled so it's harder to grind, no VS. Seeker, Whitney's Miltank, Morty's Gengar...If you undertake this journey, be prepared to reset. A lot. B/W/? also has a number of quite evil battles.