: On Windows 10/11, you must run both the installer and the game ( joey_pc.exe ) as Administrator for the unlocks to stick.
Navigate to the following path: HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\KONAMI\Yu-Gi-Oh! Power of Chaos\system
Here are some tips and tricks to help players unlock all cards in Yu-Gi-Oh! Power of Chaos: Joey the Passion:
Which are you running (e.g., Windows 10, Windows 11, or Steam Deck/Linux via Proton)?
The Yu-Gi-Oh! Power of Chaos community, while older, is still active and filled with valuable information.