Sega Genesis cheat codes

Codes for the Sega Genesis, filed against the exact build of each game rather than its title. Codes for this machine are filed by whichever device produced them.

Which device the Sega Genesis used

Codes for the Sega Genesis come from the cheat hardware sold for it, and the device a code was written for decides how it must be entered. Every code here records that format, because a code without one is a string of hexadecimal nobody can place.

Region and revision matter more here than the game’s name

A Sega Genesis game released in Europe, North America and Japan is three separate builds with memory in three different places, and a later revision can move it again. A code that is correct for one is usually wrong for the others, and being wrong means writing an arbitrary value wherever that address happens to point. Every code is filed against the game, region and revision together.