Where Are Undertale Saves Located?
Undertale LocalAppData folder with file0, undertale.ini and system info files on PC.
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Undertale saves into LocalAppData under an UNDERTALE folder, with file0 for the Surface slot, file9 for the epilogue-adjacent data, and undertale.ini for settings and fun values. The system_information files remember your past runs across resets.
True Reset wipes the slot but the game still recalls Genocide history. Wiping everything for a clean conscience means deleting the whole folder.
Where Undertale stores this, by platform
%LOCALAPPDATA%\UNDERTALE
Slots are file0 and file9, settings in undertale.ini, run memory in system_information_962 and system_information_963. Copy the folder with the game closed to preserve a run exactly. Delete everything inside for a fully clean slate, including forgotten Genocide flags.
Frequently asked questions
How do I back up Undertale saves?
Copy the full UNDERTALE folder from LocalAppData. Paste it back to restore the exact run, settings and fun value.
Does True Reset erase everything in Undertale?
No. It clears the save slot but system_information files keep run history. Only deleting the folder removes all traces.
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