Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
A complete 3-D game development suite written in Java
Godot is a powerful cross-platform game engine
An easy to use 2D HTML5 game engine written in TypeScript
Open source voxel game engine with support for survival and crafting
Injectable LUA scripting system, SDK generator, live property editor
Multi Theft Auto is a game engine
Magic Another Game Engine
Real Time Strategy game engine supporting early Westwood classics
The Ren'Py Visual Novel Engine
Xash3D FWGS engine
Open-source engine for Heroes of Might and Magic III
The game engine for everyone
Solar2D Game Engine main repository (ex Corona SDK)
The ioquake3 community effort to continue supporting/developing id's
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
A game engine powered by python and panda3d
Open game and rendering engine packed into a JavaScript framework
Voxel game-creation platform with easy modding and game creation
Multi-platform 2D and 3D game engine
Fast and lightweight JavaScript game engine built on WebGL and glTF
Free game engine for development of desktop, mobile, and web games
fheroes2 is a recreation of Heroes of Might and Magic II game engine
dhewm 3 main repository
A 2D rigid body physics engine for the web