Mega Man 6: The Greatest Battle in History!! is an action game released by Capcom for the NES in 1993, the sixth entry in the Mega Man series. It retains classic series gameplay: players control Mega Man to challenge eight Robot Masters, defeat the mastermind, and save the world.
Set during the first World Robot Expo, the story follows the mysterious Mr. X, who reprograms eight of the strongest robots to conquer the world. Mega Man sets out on another adventure to stop Mr. X’s plot.
Gameplay brings new system changes. Players collect four hidden letter circuit boards ("B", "E", "A", "T") in specific stages to unlock the support robot bird Beat. The new Energy Balancer item lets players refill weapon energy without switching weapons. The game also replaces Spring Rush and Jet Rush with Jet Mega Man and Power Mega Man forms that fuse with Rush, boosting variety and replayability.
Mega Man 6 was ported to the PlayStation in 1999, adding a Navi Mode, redrawn cover art, and other improvements to enhance the experience.