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 most complete tool for modding, decompiling and unpacking Undertale (and other GameMaker games!)

This program allow you to open the game resource files in an explorer-like interface then extract the content at will. More than 80 games are supported directly. It is plugin based making easier to add new archive file formats.



Most powerful file archiver compatible with your Windows device! Works even with password-protected, as well as multivolume archives, provides you the highest safety, and care about your privacy.



