Zelda 2: the adventures of link
zelda 1
metal gear
all 3 were fucking like impossible without a guide or cheating - i've seen ghosts n' goblins beat like it was contra...no deaths
also, wii-ware came out with this nes mega man 9 and 10 - they had an achievement system that was insanely difficult and the time trials competing on the internet is crazy hard
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