You must not have the game running. The registry only writes when the game launches.
In the original game, your card collection was saved in a specific system registry key (HKEY_CURRENT_USER\Software\Konami\Yugioh_DY\Card). The unlocker simply rewrites these binary values from "0" (Not owned) to "1" (Owned). yugioh power of chaos yugi the destiny all cards unlocker
Ensure Yu-Gi-Oh! Power of Chaos: Yugi the Destiny is properly installed. Note that it does not run well on Windows 10/11 without a dgVoodoo2 patch, but the unlocker works regardless of the graphics. You must not have the game running
However, from a player's perspective, you bought the CD-ROM in 2003. You own the license. Unlocking the cards you technically already paid for is generally considered Fair Use for personal nostalgia. Yu-Gi-Oh! Power of Chaos: Yugi the Destiny is a fantastic time capsule. The music (specifically the "Great Duel" theme) is iconic. The 3D models of Summoned Skull and Dark Magician Girl are pixel-perfect. The unlocker simply rewrites these binary values from