i got another one, the boss and\or entire game of Zombies Ate My Neighbors on the snes.
47 levels......3 lives......no continues........passwords start u on that level with a damn water gun!
the final boss would take over an hour to beat with game genie cheats,
even if u can beat him, u then have to win the ending!, u have to fight ur way through a insanely difficult lvl to see the ending credits