How to Save Games in "Yu-Gi-Oh! Power of Chaos: Yugi the Destiny"by Steven Diggs, Jr. ; Updated September 22, 2017
"Yu-Gi-Oh! Power of Chaos: Yugi the Destiny" is a PC game that allows players to play the "Yu-Gi-Oh!" card game against Yugi, Joey and Kaiba from the "Yu-Gi-Oh!" anime. The game does not allow you to save, but a workaround has been created so you can do so. You will have to perform this workaround every time that you want to play the game in order to use your card deck.
Click "Start," then "Run."
Type in "regedit." Press "Enter."
Type in "HKEY_LOCAL_MACHINE," then "SOFTWARE." Type "KONAMI," then "Yu-Gi-Oh! Power of Chaos," then "system."
Choose "Registry," then "Export Registry File." Type in a file name and location to save the file. The file will be saved with a ".reg" file extension.
Open the game's folder through "My Computer." Back up the "system.dat" and "deck.ydc" files.
Use the saved files. Take your backed-up "system.dat" and "deck.ydc" files and place them back into the game's folder. Double-click the ".reg" file you created. This will reinsert your cards back into the game.