CommaVid

CommaVid was a game developer and publisher for the Atari 2600 that released six games between 1981 and 1983, plus a programming tool for the console. The company was founded by Dr. Irwin Gaines, Dr. John Bronstein, and Dr. Joseph Biel under the name Computer Magic Video, which was shortened to Com Ma Vid, or CommaVid. It was based in Aurora, Illinois.

In addition to developing its own titles, CommaVid ported the arcade game Venture to the 2600 for Coleco.

Games
The following games were released by CommaVid:
 * Cakewalk &mdash; similar to Tapper in gameplay
 * Cosmic Swarm
 * Mines of Minos
 * Room of Doom
 * Stronghold

Unreleased prototypes

 * Frog Demo
 * Mission Omega
 * Rush Hour
 * Underworld

MagicCard
MagiCard is a programming tool on a cartridge that originally came with a 100-page manual and was only available via mail order. Video Life, an Atari 2600 implementation of Conway's Game of Life, was only offered to purchasers of MagiCard. According to Gaines, 50 to 100 MagiCard cartridges were produced and less than 20 of Video Life.