 Defeating each stage's "Robot Master" boss copies its unique weapon, which the player can select at will throughout the remainder of the game.Although the game was developed for modern consoles, "Mega Man 9" features familiar 8-bit visuals and audio similar to the Nintendo Entertainment System (NES) as a "retro" throwback to the earliest entries in the franchise.According to its producers Keiji Inafune and Hironobu Takeshita, the development team intentionally made the graphics, sound, and gameplay of "Mega Man 9" as simple as possible to adhere to the likeness of the fan and critical favorite "Mega Man 2", released in 1988.