This ROM hack, "Megaman Showdown IV" (Boss Mode), by Insectduel, takes the original Mega Man 4 (USA) NES game and modifies it to create a more challenging experience. The primary alteration is likely to the boss fights, making them more difficult than in the original game. However, the basic structure of the game, involving exploring levels, defeating Robot Masters, and collecting their weapons, remains intact. Capcom's original Mega Man 4 was praised for its balance between challenge and accessibility; this hack aims to push the balance towards a far more challenging experience.

Mega Man 4 (USA) [Hack by Insectduel v1.0] (~Megaman Showdown IV) (Boss Mode)

Mega Man 4 (USA) [Hack by Insectduel v1.0] (~Megaman Showdown IV - Hard) (Boss Mode)