This is slow but the only official method.
If you installed the game to a custom folder instead of the default directory, the save file will fail to connect. Press Win + R , type regedit , and press Enter.
Proceeding with downloading and installing save files comes with responsibilities.
If you unlock all the cards, but they disappear the next time you boot up the PC, your game directory is likely set to "Read-Only."
Paste it directly into your game's main installation folder, choosing when prompted. Step 4: Run the Registry Script Yu-gi-oh Power Of Chaos All Cards Save Game
Navigate to your game installation folder (e.g., C:\Program Files (x86)\Yu-Gi-Oh! Power of Chaos Joey the Passion ).
Navigate to your game installation folder (usually C:\Program Files (x86)\KONAMI\Yu-Gi-Oh! Power of Chaos... ). Look for a folder named system or Common .
An bypasses this entirely, giving you immediate access to the full card pool (typically 300–400+ cards per game).
Look for lines containing file paths, such as "InstallDir"="C:\\Program Files...*" or "CommonDir" . This is slow but the only official method
A confirmation message will appear stating the keys were successfully added. Alternative Method: Using the Common Directory
Enjoy building your perfect Exodia, Blue-Eyes, or Red-Eyes deck without spending 100+ hours grinding Joey’s weak monsters.
Download a trusted all-cards save file and place the new system.dat into that folder. If you are on Windows 10 or 11, you may also need to check the VirtualStore path if the game isn't reflecting the changes: C:\Users\[YourUser]\AppData\Local\VirtualStore\Program Files (x86)\KONAMI\Yu-Gi-Oh! Power of Chaos Common . 3. Update the Windows Registry
: If you installed the game in a non-default location, you must manually update the Proceeding with downloading and installing save files comes
Always open the games in chronological order ( Yugi -> Kaiba -> Joey ) during your initial setup to properly link the shared databases.
: Instantly build iconic power decks featuring game-changing cards like Exodia the Forbidden One , Blue-Eyes White Dragon , Change of Heart , and Raigeki .
Move the entire game folder out of Program Files and into a custom directory like C:\Games\ . Maximizing Your Complete Card Pool
file into that Common folder. This file holds your card progress. Update the Registry