Contra III is almost impossible to beat without a cheat, I don't care who you are. I had a friend who beat it after like six months of trying, only to get to the end screen that said something like "Sure, you finished the game, but you did it on easy mode. Try a harder difficulty, pussy." He ripped the game out of his SNES and tossed it out of his window and into the street, where it shattered into a million tiny pieces. True story.