Godot is a powerful cross-platform game engine
Fast and lightweight JavaScript game engine built on WebGL and glTF
Solar2D Game Engine main repository (ex Corona SDK)
Real Time Strategy game engine supporting early Westwood classics
A complete 3-D game development suite written in Java
The HTML5 Creation Engine
A game framework written with osu! in mind.
Stride (formerly Xenko), a free and open-source cross-platform C# game
A game engine powered by python and panda3d
Cross-platform 2D and 3D game engine with modular architecture
A modular Common Lisp game engine
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
The game engine for everyone
Free, cross-platform 2D game engine powered by Haxe and OpenFL
Recreation of the classic Grand Theft Auto III game executable
Powerful, mature open-source cross-platform game engine for Python
3D game engine/framework in C, with Luajit and Python bindings now
Free game engine for development of desktop, mobile, and web games
A refreshingly simple data-driven game engine built in Rust
Ct.js is a desktop game engine that makes learning programming fun
Multi-platform 2D and 3D game engine
Open source library for creative expression on the web, desktop, etc.
A 2D rigid body physics engine for the web
A retro game engine for Python
LayaAir is an open-source 2D/3D engine