This ROM hack, titled "Megaman Showdown IV - Hard" (Boss Mode), modifies the original Mega Man 4 (USA) game. Insectduel's hack focuses on increasing the difficulty, specifically targeting boss battles. While the core gameplay—exploring stages, defeating Robot Masters to obtain weapons—remains, the boss encounters are significantly harder. The original Mega Man 4, released by Capcom for the NES, was celebrated for its well-designed levels and challenging but fair boss fights.  This hack changes that balance, creating a much more intense experience for players seeking a greater challenge. The 'Boss Mode' specification further emphasizes the focus on challenging boss battles.

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

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