Action Replay

Action Replay and cheat devices

Action Replay was a commercial cheat disc and memory-card combo that let players enter codes to modify games at runtime. On unmodified consoles it also doubled as one of the few ways to run unsigned code, because its boot disc could launch from a retail console.

How it worked

The Action Replay disc booted its own menu, where you selected a game and a list of codes. Codes patched memory addresses while the game ran, granting things like infinite lives, unlocked levels, or modified stats. A bundled memory card stored your code lists.

Relevance to homebrew

• Early homebrew exploited Action Replay and similar discs as an entry point on stock hardware.
• Modern setups rarely need it: Swiss and PicoBoot are cleaner and more flexible.
• Swiss itself can apply cheat codes to games it loads, covering most of what Action Replay offered.

Should you bother today?

If you already run Swiss, its built-in cheat engine handles code injection from text files, so a separate cheat disc is largely redundant. Collectors still keep Action Replay for nostalgia or as a historical entry point, but for everyday cheating the homebrew route is simpler and does not tie you to a specific disc.