Multi Theft Auto is a game engine
fheroes2 is a recreation of Heroes of Might and Magic II game engine
Open-source engine for Heroes of Might and Magic III
Voxel game-creation platform with easy modding and game creation
Open source clone of the Age of Empires II engine
Descent 3 by Outrage Entertainment
dhewm 3 main repository
Cocos simplifies game creation and distribution with Cocos Creator
3D Procedural Game Engine Using OpenGL
The game engine for everyone
Recreation of the classic Grand Theft Auto III game executable
3D Game engine with editor
RPG Maker 2000/2003 and EasyRPG games interpreter
Solar2D Game Engine main repository (ex Corona SDK)
Cross-Platform C++ 2D/3D game engine
Powerful, mature open-source cross-platform game engine for Python
Free game engine for development of desktop, mobile, and web games
A multi core friendly rigid body physics and collision detection lib
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Multi-platform 2D and 3D game engine
Voxel game engine in C++ with OpenGL
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
A game engine with an emphasis on real-time cutting-edge solutions
Cross-platform 2D and 3D game engine with modular architecture
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games