Play [Program] Action Replay (Europe) Online

Action Replay for the Sega Genesis was a cartridge released by Datel that let you modify game data on the fly. It was a popular tool in the 16-bit era, especially for players who wanted to tweak or break their favorite games without complex hardware modifications.

You don't control a character; instead, you enter codes to alter values in a game's memory, like giving yourself infinite lives, maxing out stats, or unlocking hidden content. The main objective is experimentation, finding what each code does and often causing unexpected, chaotic results. The pacing is entirely self-directed, and the difficulty lies in entering codes correctly and managing the sometimes unstable effects. It feels like having a backstage pass to every game on the system.