The most complete tool for modding, decompiling and unpacking Undertale (and other GameMaker games!)
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Updated
Oct 28, 2025 - C#
The most complete tool for modding, decompiling and unpacking Undertale (and other GameMaker games!)
Modular game engine built with MonoGame, with GMS2-like workflow and advanced level editor
A GML supplement library for GMS 2.3+
A RenderDoc settings file generator for GameMaker: Studio 2 projects.
A metroidvania engine made in Game Maker Studio 2
List of resources to learn game development related skills
GitHub-ReadMe-Bagdes displaying "Made With game Maker" with the Game Maker Icon, based on shields.io badges, in markdown
An efficient bullet hell library made for Gamemaker Studio 2.3.0.
A proof of concept mod loader for Gamer Maker Studio games that uses UndertaleModLib to patch mods independently so multiple mods can be used at once.
Static site for viewing Undertale/Deltarune game scripts made so we have a site to reference when citing code on Undertale/Deltarune Wiki (original by xkeeper).
An object pooling implementation in GML for Game Maker Studio 2.3+
My custom and pretty readable version of a RegEx like string manipulator made in GM for GM 2.3+
A substitute IDE for GameMaker Studio 2 projects that works on linux
Manages multiple animations for a single sprite strip by flagging start and end points of the animations for GameMaker Studio 2.3.3+
Game Maker Language with types (2.3 beta)
an easy HTTP server implementation for GameMaker projects
💡 A game where you're a blur of light trying to escape an encroaching darkness made for the 2012 GameMaker Steam Workshop.
A collection of free GameMaker assets/projects - Moved to: https://codeberg.org/pikku-a/gamemaker-assets
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