[1] It was in the first wave of Atari VCS games to follow the original nine launch titles.

It was one of three cartridges to accompany the introduction of the Atari keyboard controller, an add-on launched in response to claims of false advertising that the VCS is a "computer" (the other two were Hunt & Score and Brain Games).

[5] In each game the player must take turns to guess a numerical code and enter it using the keyboard controller.

[1] Contemporary reviewers were relatively positive about the game but all mentioned its similarity to Mordecai Meirowitz's Mastermind.

[6] Personal Computing Magazine described it as "[b]ased on the Mastermind concept".