This ROM hack of Mega Man (USA) was made by a group known as Duelists. Version 1.0, centered around Bass as the primary character or through alterations to the original game's story that highlight Bass. The game uses the base of the original Mega Man title but alters it by having Bass as a central element, changing both the story and gameplay experience. This hack was made by independent creators, and no commercial company is listed.

Mega Man (USA) [Hack by Duelists v1.0] (~Bass)

Mega Man (USA)