Rockman Mega World, known as Mega Man: The Wily Wars, is a remake compilation of Mega Man, Mega Man 2 and Mega Man 3, released for the Sega Mega Drive/Genesis. The game never saw a cartridge release in North America (although a release was planned[5]) and was only available for download through Sega's "Sega Channel" service in the mid-to-late 1990s. This game is featured as a built-in game in the Sega Genesis: Ultimate Portable Game Player by AtGames, but that version cannot access Wily Tower, as it cannot save.

Mega Man: The Wily Wars was re-released on the Sega Genesis/Mega Drive Mini on September 19, 2019.

Retro-Bit Gaming announced a licensed physical reproduction cartridge of Mega Man: The Wily Wars to be released the future. It was formally revealed on May 19, 2021 to be pre-ordered between May 21 through June 21 for $69.99 USD MSRP.

On June 30, 2022, this game was added to Nintendo Switch Online as part of the Sega Genesis Expansion Pack.