Mega Man Mega Man consists of six side-scrolling platformer levels freely chosen by the player. In each level, the player-character, Mega Man, fights through various enemies and obstacles before facing a "Robot Master" boss at the level's end. Upon defeating the boss, the player assimilates the Robot Master's signature attack, or "Master Weapon", into Mega Man's arsenal for the rest of the game. Unlike the standard blaster, the Robot Master powers have limited ammunition replenished by collecting ammunition cells dropped by defeated enemies at random. Enemies also drop energy cells that replenish Mega Man's health gauge. While the player is free to proceed through the game in any order, each Robot Master is especially vulnerable to a specific weapon, which encourages the player to complete certain stages before others. The player can also revisit cleared levels.
Besides the weapons taken from the Robot Masters, the player is able to pick up a platform generator item known as the "Magnet Beam" in Elec Man's stage. Mega Man also features a scoring system where players score points for defeating enemies, and earn extra points for collecting power-ups from fallen enemies and for clearing each stage, this is only game in whole Megaman series by other Megaman games not to induced. When all six Robot Master stages are completed, the seventh and last stage appears in the middle of the stage select menu. This stage, known as the "Wily Fortress", is a chain of four regular stages linked together, each containing at least one new boss. During these final stages, the six Robot Masters must also be fought again in a predetermined order before the final confrontation against Dr. Wily.