Solar2D Game Engine main repository (ex Corona SDK)
Open Source Fan-Based EverQuest Emulator Server project
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
Multi Theft Auto is a game engine
fheroes2 is a recreation of Heroes of Might and Magic II game engine
Diablo build for modern operating systems
Dust3D is a cross-platform open-source 3D modeling software
ZeroMQ core engine in C++, implements ZMTP/3.1
The game engine for everyone
Open source clone of the Age of Empires II engine
Powerful, mature open-source cross-platform game engine for Python
Open-source engine for Heroes of Might and Magic III
RenderDoc is a stand-alone graphics debugging tool
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
An open source C++ game engine
3D Procedural Game Engine Using OpenGL
Community effort to maintain and improve Jedi Academy (SP & MP)
A multi core friendly rigid body physics and collision detection lib
lua dev plugin for unreal engine 4 or 5
Write your game with TypeScript in UE or Unity
An open source re-implementation of Chris Sawyer's Locomotion
Animation Compression Library