Mega Man 4 (USA) (Rev A) [Hack by Insectduel v1.0] (~Megaman Showdown IV - Hard) (Boss Mode) is a ROM hack of Mega Man 4 (USA) Revision A, created by a hacker named Insectduel. The original Mega Man 4 gameplay of precise platforming and strategic weapon use is modified.  The "Megaman Showdown IV" moniker suggests a significant alteration to the game's content and perhaps difficulty.  The "Hard" and "Boss Mode" additions indicate a focus on increased challenge and a mode specifically concentrated on boss battles. Insectduel's modifications offer a drastically altered experience from the original.

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

Mega Man 4 (Europe)