Solar2D Game Engine main repository (ex Corona SDK)
Injectable LUA scripting system, SDK generator, live property editor
Cross-Platform C++ 2D/3D game engine
Flax Engine, multi-platform 3D game engine
Simple and light-weight 3D game engine
Diablo build for modern operating systems
GemRB is a portable open-source implementation of the Infinity Engine
Multi Theft Auto is a game engine
The game engine for everyone
Open source clone of the Age of Empires II engine
fheroes2 is a recreation of Heroes of Might and Magic II game engine
Dust3D is a cross-platform open-source 3D modeling software
An open source re-implementation of Chris Sawyer's Locomotion
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
RenderDoc is a stand-alone graphics debugging tool
Powerful, mature open-source cross-platform game engine for Python
Doom-based AI research platform for reinforcement learning
3D Procedural Game Engine Using OpenGL
A multi core friendly rigid body physics and collision detection lib
Write your game with TypeScript in UE or Unity
Open-source engine for Heroes of Might and Magic III
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Animation Compression Library
An open source C++ game engine