Everyone knows that classic game systems had a plethora of peripherals and add-ons... So let's try to make some lists! Any system before PS2 is accepted, and odd, rare peripherals are welcomed and actually preferred. I just found out about the Game Doctor today for the SNES, and I thought, what other peripherals may exist?
Game Doctor
www.youtube.com/watch?v=SXulI2jqhYs