Note: This does not work for all versions (especially Joey the Passion, which uses a different save structure).
To use these tools, players typically follow these steps, as detailed on community forums like Reddit :
: Ensure the game is set to "Run as Administrator" via its properties to allow it to read and write save data correctly. Locate the Common Folder : All three games share a folder usually titled Yu-Gi-Oh! Power of Chaos Common . This is where the main save file, system.dat , is stored. The Unlock Method Unlocking all cards usually involves three main steps: Backup Your Data : Before modifying anything, copy your existing system.dat (deck) files to a safe location. Replace the Save File
: If the game fails to save your new deck or unlocked cards, ensure you have set the game's .exe to Run as Administrator and established Compatibility Mode for Windows 7 or XP.
Unlocks all cards (typically 155 in Yugi , 300+ in Kaiba , and 350+ in Joey ) without needing to win duels to earn individual packs.
