In Mega Man X6, three weeks have passed. Mega Man's long-time partner, Zero, protected the Earth from colliding with a colony at the cost of his own life. Even worse, the incident has turned the Earth into a wasteland, devoid of life. As mankind is unable to go outside into the wasteland, reploids are put to work rebuilding the planet while the humans exist underground, waiting. All seems to be going as planned when Mega Man X gets a warning message from Alia telling him that a gigantic reploid is on the rampage. As the game begins, Mega Man X heads to the battlefield - It's up to you to determine the outcome.
Mega Man X6 introduces the following new features:
The Nightmare System - A brand new game system whereas players' actions will make changes to other stages. Depending on choices made in previous levels, hidden paths can open, new enemies will appear, various traps can open up and other secrets are revealed.
Random Stage System - The map of the designated level changes every time you play. The enemies and boss characters are completely random and will change each time the level is played. Fans of the series will recognize the return of five boss characters from previous Mega Man games.
Reploid System - Players obtain various power-up parts by rescuing reploids in each of the stages. Depending on which reploid is rescued, the power-up parts will vary. There is a large amount of reploids to be rescued creating a massive challenge and excellent replay value.