Play Game Genie (program) Online

Game Genie was a program released for the Sega Genesis, known as the Mega Drive in some regions, in 1990. It was developed and published by Codemasters. This wasn't a typical game; it was a utility that plugged into the console, letting you alter the code of your existing cartridges. It arrived during a time when players were looking for new ways to interact with their growing libraries of challenging titles.

You don't control a character; you manipulate the game itself. The main objective is to input codes that change a game's behavior, like granting infinite lives, making your character invincible, or skipping to later levels. The core mechanics involve looking up codes in the provided booklet, carefully entering long strings of letters and numbers on a special screen, and then testing the results in the game. The pacing is entirely your own, as you experiment to see which codes work and how they break the intended difficulty. It feels like having a secret backdoor into your favorite games, letting you rewrite their rules on the fly.