Karate Champ for the NES was pretty awful. It is almost comic at times how the two karatekas can miss each other repeatedly at close range. International Karate for the C64 was rough, too, but not as bad as the NES' Karate Champ, I think.

Oh, I doubt anyone who ever played Dr. Jekyl and Mr. Hyde for the NES can forget the impotent cane that embodied the spirit of the entire crap game. If that game were a bit more pretentious, it would have been an epic indie art game.