Mega
Man 64
Unlock Hard Mode and Easy
Mode
There are two additional difficulty modes hidden in Mega Man 64. To unlock Hard
Mode, you need to finish the whole game. Don't turn off the console. After you
have watched the ending, start a new game. You will now have the option to play
the game on Hard.
To get the utterly superfluous Easy Mode, you have to finish Mega Man 64 in under 3 hours of total play time (yes, the game is really that short) or, if you've unlocked it, finish the game in Hard Mode.