[biakabutukafan]

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god [censored] damnit bart vs. the space mutants is impossible as is fester's quest

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Battletoads is the same way without a Game Genie. Even with infinite lives I don't think I ever beat it.

Burger Time also falls into this category.

My favs are Tecmo Bowl, Kid Icarus, Tetris, Q-Bert, all 3 TMNT games, SMB 3.