After changing your Gamertag, Age of Empires III: Definitive Edition may not automatically show previous saved data. Instead, it can be found manually using the steps below:
- Open Age III: DE and choose Load.
- Select Open Saved Games and a new window will open. This is the folder for the new gamertag.
- Find the save files for the previous gamertag.
- Usually this can be done by navigating to the Age of Empires 3 DE folder and finding the folder for the previous gamertag.
- Copy the files into the Savegame folder for the new gamertag.
- Close and reopen the game to check the changes.