Atari 2600 Video Life
Video Life is a rare video game for the Atari 2600 only available via a special mail order offer to owners of Commavid's Magicard (a programming tool), which itself is considered to be one of the rarest Atari 2600 cartridges ever released. According to the internet, original CommaVid co-owner Irwin Gaines, has been quoted as saying only "20 cartridges or less" of Video Life were ever made. However, an out of date registry on AtariAge has 20 copies identified. The game itself is a version of the classic computer-based life simulator (Conway’s Game of Life) in which you create an organism and watch it grow.