Alien Brigade
The Plutoid Alien Zombie force has infiltrated the Army. They look like soldiers but are actually Aliens from outer space. You control a special ta...
3D Asteroids
This is a pre-release prototype of Asteroids. Like the release version, this game title screen has a copyright date of 1984, but the rom file name ind...
32 in 1
PAL only release. Includes UFO, Fun with Numbers, Flag Capture, Golf, Adventure, Freeway rabbit, Football, Fishing, Boxing, Freeway Chicken, Combat, S...
Yellow Submarine
Yellow Submarine was a prototype coded by an unknown Atari programmer to demonstrate directional control and the ability to move off one side of the s...
Xari Arena
An unreleased prototype game for the Atari 5200. Your goal is to destroy all the Xari's that come out of the well in the center of the screen befor...
Sports Goofy
An unreleased prototype for the Atari 5200. You take control of goofy as he competes in two events, the Marathon Dive and the Pogo Pop. The Maratho...
Spitfire
Of all the prototypes that have passed through my hands over the years, Spitfire is definitely one of the strangest. Part Zaxxon and part Star Raider...
Microgammon SB
Microgammon SB originally started out as an Apple IIe game. According to programmer Steve Baker, he had originally developed the game for the Apple w...
Meebzork
An unfinished prototype game that was originally planned as a shooter but the last available version ends up being more an action/adventure game. Ther...
Looney Tunes Hotel
Looney Tunes Hotel was a nearly completed video game that was going to be released for the Atari 5200. Players were to play on a set of hotels, but At...