Cross-Platform C++ 2D/3D game engine
Cocos simplifies game creation and distribution with Cocos Creator
Flax Engine, multi-platform 3D game engine
Cross-platform 2D and 3D game engine with modular architecture
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Simple and light-weight 3D game engine
Multi-platform 2D and 3D game engine
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Free game engine for development of desktop, mobile, and web games
Voxel game engine in C++ with OpenGL
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
3D Game engine with editor
3D Procedural Game Engine Using OpenGL
Powerful, mature open-source cross-platform game engine for Python
3D game engine/framework in C, with Luajit and Python bindings now
GemRB is a portable open-source implementation of the Infinity Engine
3D game engine with lua scripting
Voxel game-creation platform with easy modding and game creation
Stride (formerly Xenko), a free and open-source cross-platform C# game
Lightweight, high-performance HTML renderer for game developers
An iOS & tvOS Frontend for Multiple Emulators
Go bindings for raylib, a simple and easy-to-use library
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL