Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Fast and lightweight JavaScript game engine built on WebGL and glTF
The Tiny JavaScript Game Engine That Can!
2D JavaScript Physics Engine
Godot is a powerful cross-platform game engine
LayaAir is an open-source 2D/3D engine
A 2D rigid body physics engine for the web
An easy to use 2D HTML5 game engine written in TypeScript
A high-performance, industry-standard 2D physics engine built on Box2D
A fresh & lightweight javascript game engine
The game engine for everyone
Open game and rendering engine packed into a JavaScript framework
Cocos simplifies game creation and distribution with Cocos Creator
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Ct.js is a desktop game engine that makes learning programming fun
Open source library for creative expression on the web, desktop, etc.
Multi Theft Auto is a game engine
A complete 3-D game development suite written in Java
The Ren'Py Visual Novel Engine
Free, open source game engine online
Open source voxel game engine with support for survival and crafting
Voxel game-creation platform with easy modding and game creation
Xash3D FWGS engine
Injectable LUA scripting system, SDK generator, live property editor
Real Time Strategy game engine supporting early Westwood classics