The most complete tool for modding, decompiling and unpacking Undertale (and other GameMaker games!)
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Updated
Apr 23, 2026 - C#
The most complete tool for modding, decompiling and unpacking Undertale (and other GameMaker games!)
A highly flexible, voxel-powered game engine with an embedded editor. Create games using Lua, the native C/C++ API, and assets authored in voxel editors like MagicaVoxel or Avoyd.
Modular game engine built with MonoGame, with GMS2-like workflow and advanced level editor
A free, open source 2D online RPG engine in C#/.NET
Mega Man GameMaker Studio 1.4.1760 Engine
A shoot-em-up made in 48 hours for the 20th gm(48) game jam.
Also known as DBGHELP.DLL; Scheduler resolution fix for GM:Studio and GM8.1 (not to be confused with Debugger Helper)
A quality of life extension for Game Maker 8.2
TileGameLib is a toolkit containing a pair of software libraries (one for C++, another for C#) for quick and easy development of tile-based, pseudo-8-bit games.
A library with demo projects to learn Game Maker Studio and Game Maker Language (GML)
A modern fork of various IWBTG engines designed for GM8.2
A RenderDoc settings file generator for GameMaker: Studio 2 projects.
You can draw your map using by this Map Editor project.
A metroidvania engine made in Game Maker Studio 2
A scope non-breaking foreach loop for arrays, lists, maps, structs, grids, strings and number ranges
A modern GBA game creation engine inspired by GB Studio. Build 32-bit GBA games with scene management, controller support, and easy audio import—designed for beginners and developers alike.
The collaborative 3D HTML5 game maker
An efficient bullet hell library made for Gamemaker Studio 2.3.0.
GitHub-ReadMe-Bagdes displaying "Made With game Maker" with the Game Maker Icon, based on shields.io badges, in markdown
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