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
Desktop/Android/HTML5/iOS Java game development framework
One framework for creating powerful cross-platform games
Open Source MMORPG Framework
Fast and lightweight JavaScript game engine built on WebGL and glTF
Open source HTML5 game framework that offers WebGL and Canvas
ThinkPHP Framework
lua dev plugin for unreal engine 4 or 5
Open source library for N64 development
Open source library for creative expression on the web, desktop, etc.
Self-hosted CMS platform based on the Laravel PHP Framework
A game framework written with osu! in mind.
You can make it - Open Source MMORPG Platform
Gideros Release version
CTFs as you need them
Arianne is an engine to develop multiplayer online games like Stendhal
Game engine supporting many 3D/2D formats and graphic effects
INSTEAD - Simple Text Adventure Interpreter.
Orx: Portable Game Engine
Old-school 2D game engine
PyCAPGE - Python Classic Adventure Point and Click Game Engine
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented