A Game of Concentration

A Game of Concentration is a video game programmed by Jim Heuther of Atari, Inc. and released in 1978 for the Atari VCS. It is a digital version of the classic memory game played with cards. A Game of Concentration is one of a handful of games that use Atari's keypad controllers.
The game was released by Sears for its Tele-Games Video Arcade console under the name Memory Match.

Gameplay

The game is played using a matrix of numbered panels, either 4 x 4 or 5 x 6. Using the keypad, players enter the number of the panels they wish to reveal. If the images behind the two panels match, the panels are removed and the player scores 1 or 2 points, depending on what difficulty the switch is set to, along with an extra turn.
The game has a total of eight variations, four each for each matrix size and four have wild cards. Each matrix can be played by either a single player or by two players taking turns; in single-player games, the player attempts to clear the matrix with as few incorrect matches as possible. Also, players can enable wild cards that will match any image on the board.