5200 Menu (1983)

An extra-rare prototype cartridge. Only one is known to exist. 5200 Menu is a rare prototype that seems to be a kiosk of sorts. The game features Asteroids, which was never released for the system, Quagmire, which nothing is known about as it was canceled, and Failsafe, which was the working-title name for Countermeasure.

• Release Date: December 31, 1983
• Developer: Atari