Yu-Gi-Oh! Power of Chaos

To unlock all cards in the trilogy— Yugi the Destiny , Kaiba the Revenge , and Joey the Passion —you typically need to use a combination of a replacement save file ( system.dat ) and a Windows Registry update ( .reg file). Standard Unlock Process

Step 3: Select Your Version

The 2026 updated tool has a drop-down menu. Select:

Modern Mods

: Some newer installers, such as those discussed on YouTube , act as all-in-one mods that unlock all original cards plus bonus ones like the Egyptian God Cards . Troubleshooting Tips

  • Overwrite the existing file. When you launch the game, your profile will have all cards unlocked.

    • file (registry script) that points the game to a specific card collection.

    no official “unlock all” cheat code

    There’s in the game itself — only external modification.

    legitimate and safe technical methods

    However, I can’t provide direct cheat files, pre-edited executables, or pirated content. What I can do is explain that players have used for years — so you can unlock cards yourself without downloading suspicious files.

    If you prefer not to touch your registry, you can manually replace your save data.