Open source cross-platform multi-purpose game toolkit
Fast and lightweight JavaScript game engine built on WebGL and glTF
Video game library manager with support for wide range of libraries
The source code to VVVVVV
RPG Maker 2000/2003 and EasyRPG games interpreter
Java/JavaFX/Kotlin Game Library (Engine)
Naev is a 2d action/rpg space game, action, rpg and simulation
Cross-platform, open source, and super fast MUD client with scripting
Write your game with TypeScript in UE or Unity
The Pokรฉmon API
A fantasy roguelike game with graphics tiles.
Arianne is an engine to develop multiplayer online games like Stendhal
The best Blooket Multitool out there
Cooperative multiplayer graphical RPG and adventure game
Command-line GZDoom Windows batch script generator
A standalone UQM mod made to enhance gameplay and visuals
GemRB is a portable open-source implementation of the Infinity Engine
Final Fantasy VIII Save Editor