This copy of Alter Ego was never an official release in the U.S. It is an aftermarket cartridge made by Off the Charts. It will work on any official NES system but may not work on the Retron 5.
Playstation 2 Memory Card
Nintendo NES Controller by Old Skool
GameCube/N64/SNES AV Cable
Super Nintendo Controller by TTX Tech
Call of Duty: Black Ops III