Mega Man for the Game Gear is far from a common or well known game.
It is based on elements from the 8-bit Nintendo versions of Mega Man 4 and Mega Man 5.
Differences include a lack of continues (if the game is over, it restarts to the title), the addition of vertical scrolling (due to the Game Gear’s screen size), powerups bouncing when they hit the ground, and a hard difficulty mode (though the player has to get at least a password from this mode, since both difficulties don’t share the same passwords).
The Robot Masters featured at the beginning are Bright Man, Napalm Man, Star Man, and Stone Man. Dr. Cossack’s fortress contains Wave Man’s and Toad Man’s levels and respective bosses. Wily’s fortress is actually Quick Man’s stage, though you are taken to a condensed Dr. Wily stage after going through the first boss door instead. The ending features Dr. Cossack’s fortress being destroyed.
Part of the games value comes from the rarity by being one of the last Game Gear games released.