Most unlockers are distributed as small archives containing a .reg file and a system.dat file. The standard process involves: existing save data to avoid permanent loss. Extracting files into the game’s /Common/ directory. Executing the registry script to overwrite progress data.

Once the registry knows where to look for the "completed" save file, your library will be full. ⚠️ A Note on Modern Systems

: On modern systems (Windows 10/11), the game must often be run in Administrator mode

However, the unlock system is slow, and many cards (including some iconic ones) are not obtainable through normal gameplay without editing save files. This is where the tool/script comes in.

Navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\KONAMI\Yu-Gi-Oh! Power of Chaos\system