Cross-Platform C++ 2D/3D game engine
Cocos simplifies game creation and distribution with Cocos Creator
Voxel game engine in C++ with OpenGL
Cross-platform 2D and 3D game engine with modular architecture
Game engine supporting many 3D/2D formats and graphic effects
Flax Engine, multi-platform 3D game engine
An OpenGL RTS game engine written in C
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Zig game engine & graphics toolkit
Multi-platform 2D and 3D game engine
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
Xash3D FWGS engine
3D Procedural Game Engine Using OpenGL
A modular Common Lisp game engine
3D Engine c++
GemRB is a portable open-source implementation of the Infinity Engine
3D Game engine with editor
3D game engine/framework in C, with Luajit and Python bindings now
Free game engine for development of desktop, mobile, and web games
Powerful, mature open-source cross-platform game engine for Python
A free 3D game engine to create games and realtimes scenes for Windows
Amateur 3D Game Engine