Open-source engine for Heroes of Might and Magic III
Voxel game-creation platform with easy modding and game creation
The game engine for everyone
Multi-platform 2D and 3D game engine
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Solar2D Game Engine main repository (ex Corona SDK)
Recreation of the classic Grand Theft Auto III game executable
Cocos simplifies game creation and distribution with Cocos Creator
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Multi Theft Auto is a game engine
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
A multi core friendly rigid body physics and collision detection lib
dhewm 3 main repository
3D Procedural Game Engine Using OpenGL
RPG Maker 2000/2003 and EasyRPG games interpreter
Orx: Portable Game Engine
Injectable LUA scripting system, SDK generator, live property editor
GemRB is a portable open-source implementation of the Infinity Engine
RTSish Game Engine
Animation Compression Library
A free 3D game engine to create games and realtimes scenes for Windows
Urho3D Game engine
Fork of AbuseSDL to carry on development
3D C++ Game Engine - yet another open source game engine