Supports online play via Hamachi or similar services.
Sometimes, launching the game reveals a blank library instead of the unlocked cards. Follow these steps to resolve the issue: Check Administrator Permissions
that you can build once all cards are unlocked.
Did you download the or a portable (zip) version ? What Windows version are you running (10 or 11)?
Right-click the downloaded .zip or .rar archive and extract it. Locate the file named All Cards.reg or Unlock.reg . Double-click the file. unlock all card yu-gi-oh power of chaos legend reborn
Tools like the All Card Unlocker (updated for 2025) are designed for all Power of Chaos versions and mods. Registry Edit (Advanced):
If you download Legend Reborn and find your card library empty or unable to save, it is because your operating system is blocking the game from writing to these two elements. Step-by-Step Guide to Unlock All Cards
A prompt will ask if you want to add this information to the registry. Click Yes. Restart the game. Your library should now be at 100%. Method 3: The Manual Registry Fix
Protect your current game state in case you want to revert back later: Supports online play via Hamachi or similar services
C:\Program Files (x86)\KONAMI\Yu-Gi-Oh! Power of Chaos Common ) and overwrite the existing one. Method 2: Manual Registry Fix (For Windows 10/11)
If an unlocker isn't present, the game stores card progress in the Windows Registry under HKEY_LOCAL_MACHINE\SOFTWARE\KONAMI\Yu-Gi-Oh! Power Of Chaos\system . Changing the CommonDir path to point correctly to your save folder often resolves issues where cards aren't saving or appearing.
If you want to skip the endless duels and jump straight to deck-building, here is how you can unlock every card in the game. The Fast Track: Using an All Cards Unlocker
is a popular fan-made community mod that combines the content of the three Power of Chaos games, updates the card pool, and fixes common modern PC issues. Many players seek to unlock all cards instantly to build nostalgic, competitive, or experimental decks without the tedious grinding. Did you download the or a portable (zip) version
Rename your original system.dat to system.dat.bak (as a backup). Copy the new, unlocked system.dat file into this folder. Launch the game. 4. Fix Registry Issues (If Cards Don't Unlock)
Verify that the unlocker file matches your exact game version. If the crashes persist, restore your backed-up system.dat file to return the game to normal. "Access Denied" Registry Errors
A Windows warning prompt will appear asking if you want to add this information to the registry. Click .