* Caverns Of Mars (exclusive)
* Quadrun (originally sold only by mail order through the Atari fan club)
* Saboteur (unreleased prototype)
* Space War
* Yars' Return (exclusive)
* Yars' Revenge
* Maze Craze
* Off The Wall
* Outlaw
* Pitfall! (originally released by Activision)
* Radar Lock
* River Raid (originally released by Activision)
* Save Mary (unreleased prototype)
* Video Checkers
* Video Chess
* 3D Tic-Tac-Toe
* Aquaventure (unreleased prototype)
* Atari Climber (homebrew), released in 2004 as Climber 5
* Combat
* Combat 2 (unreleased prototype)
* Dodge 'Em
* Fatal Run (only released in Europe)
* Frog Pond (unreleased prototype)
* Hangman
* Human Cannonball
* Arcade Asteroids (hack) of the original Atari 2600 Asteroids with the sprites changed to outlines to more accurately portray the arcade version
* Arcade Pong (exclusive to the Flashback 2), a version of Pong which can use paddle controllers if attached
* Asteroids Deluxe (exclusive)
* Battlezone
* Centipede
* Lunar Lander (exclusive)
* Millipede
* Missile Command
* Space Duel (exclusive)
* Adventure
* Adventure II, a sequel to Adventure that is built on its original assembly-based game code
* Haunted House
* Return To Haunted House, a sequel to Haunted House that is built on the original Adventure's assembly-based game code combined with graphics from the original Haunted House)
* Secret Quest
* Wizard (unreleased prototype)