How to Change Your Name in Undertale on Windows
You really have to edit the save files directly! It’s in the AppData\Local\UNDERTALE folder. Be careful and back up your files!
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To change your name in Undertale on Windows, you need to edit the 'file0' and 'file9' in your game's save data folder. Just open them with a text editor and modify the name. Don't forget to back up your saves first!
Simply change the name in the 'file0' and 'file9' within the game’s save directory. Use a text editor and you're good to go. Make sure to back up first!
Here's the scoop: Open your save data folder in C:\Users\[Your Name]\AppData\Local\UNDERTALE. Locate 'file0' and 'file9', then edit those bad boys with a text editor to change your name. Done!
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