Playing as one of four characters (Mega Man, Proto Man, Bass, and Duo), the player chooses between three sets of boss battles with various Robot Masters from the series. The battles are fought linearly in any order, and after each boss is defeated, a special weapon is added to the player's arsenal.
Playing as one of four characters (Mega Man, Proto Man, Bass, or Duo), the player selects among three sets of boss battles with different Robot Masters from the series. The fights are conducted sequentially in any order, and after each battle is won, a special weapon is added to the player's collection.