Godot is a powerful cross-platform game engine
A simple and easy-to-use library to enjoy videogames programming
Enables Roblox developers to use professional software tools
Real Time Strategy game engine supporting early Westwood classics
Open Source MMORPG Framework
Fast and lightweight JavaScript game engine built on WebGL and glTF
Desktop/Android/HTML5/iOS Java game development framework
One framework for creating powerful cross-platform games
Open source HTML5 game framework that offers WebGL and Canvas
ThinkPHP Framework
A game framework written with osu! in mind.
Open source library for N64 development
You can make it - Open Source MMORPG Platform
Self-hosted CMS platform based on the Laravel PHP Framework
CTFs as you need them
Gideros Release version
Open source library for creative expression on the web, desktop, etc.
Arianne is an engine to develop multiplayer online games like Stendhal
Game engine supporting many 3D/2D formats and graphic effects
Orx: Data-Driven Game Engine
utility collection for 2D game development in Java; sound-player
Old-school 2D game engine
lua dev plugin for unreal engine 4 or 5
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented
An isometric arcade-style game of skill, puzzles and exploration