Cross-Platform C++ 2D/3D game engine
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Powerful, mature open-source cross-platform game engine for Python
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Game engine supporting many 3D/2D formats and graphic effects
Vivid is a modern C++ 3D engine using OpenGL4+
Go 3D Game Engine
A 2D game engine and level editor
Cross-platform 2D and 3D game engine
Blueshift is a cross-platform 3D game engine implemented in C++
Portable game engine with main focus on point-and-click adventures
A C++ 3D game engine.
Egret is a brand new open mobile game and application engine
XNA based game engine completely written in c#
3D Game engine
2D - 3D game engine