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Game Genie BIOS (Genesis)

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Title Screen

Game Genie

Developer: MicroSystems Development
Publisher: Galoob
Platform: Genesis
Released in US: 1992


CopyrightIcon.png This game has hidden developer credits.
GraphicsIcon.png This game has unused graphics.


The first follow-up to the NES version of the popular cheat device, this one introduced such additional features as support for up to five codes and the built-in effects switch.

Unlike their rivals, Sega actually gave this a license. "Genesis Does What Nintendon't", indeed.

Unused Characters

There are several characters out of bounds that can be selected by forcing RAM address pointer $8059 beyond the final selectable character while in the first row of letters.

Artwork Value Description
Game genie gen 21 i.png
$21 The letter "I".
Blank.png
$22 A blank graphic.
Game genie gen 23 u.png
$23 The letter "U".
Game genie gen 24 coins.png
$24 A pile of coins.
Game genie gen 25 lamp.png
$25 A genie lamp.
Game genie gen 26 snake.png
$26 A snake.
Game genie gen 27 basket.png
$27 A basket.

Developer Credits

Stored at address 32E.

Game Genie program developed by Robert Leyland for MicroSystems Development of San Jose, CA.
Produced by Galoob Toys Inc. of South San Francisco, CA. Original concept by Codemasters Ltd.
of London, England. 19 Feb 1992