The most complete tool for modding, decompiling and unpacking Undertale (and other GameMaker games!)
Cost / License
- Free
- Open Source (GPL-3.0)
Platforms
- Mac
- Windows
- Ubuntu
- Linux

The only alternative to Deltarune Save Editor so far is UndertaleModTool, which is free and open source. It runs on Mac, Windows and Linux.
The most complete tool for modding, decompiling and unpacking Undertale (and other GameMaker games!)
