The most complete tool for modding, decompiling and unpacking Undertale (and other GameMaker games!)
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Updated
Dec 24, 2025 - C#
The most complete tool for modding, decompiling and unpacking Undertale (and other GameMaker games!)
A work-in-progress modding tool geared toward UNDERTALE/DELTARUNE
A tool to convert DELTARUNE Chapter 1&2 save files between PC and console editions of the game.
Scripts to patch Deltarune PC to work on the Nintendo Switch
Mod that adds difficulty options to Deltarune. Make the game easy, hard, or nightmare! ( or no-hit! )
A music randomizer for Undertale and Deltarune.
Welcome to Wild Card, a top-down rogue-lite shooter inspired by games like Vampire Survivors and themed around the vibrant world of Deltarune!
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