Cross-Platform C++ 2D/3D game engine
Simple and light-weight 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
aka ogre v2 - scene-oriented, flexible 3D C++ engine
Game engine supporting many 3D/2D formats and graphic effects
Flax Engine, multi-platform 3D game engine
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
An OpenGL RTS game engine written in C
A real-time 3D engine for DOS-talgics (see GLOBE_3D for new stuff !)
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
Xash3D FWGS engine
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
3D Procedural Game Engine Using OpenGL
A modular Common Lisp game engine
GemRB is a portable open-source implementation of the Infinity Engine
3D Engine c++
A re-implementation of Freelancer
3D Game engine with editor