Cross-platform 2D and 3D game engine with modular architecture
Flax Engine, multi-platform 3D game engine
Injectable LUA scripting system, SDK generator, live property editor
The Ren'Py Visual Novel Engine
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Cocos simplifies game creation and distribution with Cocos Creator
Cross-Platform C++ 2D/3D game engine
An OpenGL RTS game engine written in C
s&box is a modern game engine, built on Valve's Source 2
Simple and light-weight 3D game engine
3D engine with modern graphics
Multi-platform 2D and 3D game engine
Stride (formerly Xenko), a free and open-source cross-platform C# game
3D Game engine with editor
Powerful, mature open-source cross-platform game engine for Python
Multi Theft Auto is a game engine
3D Engine with Blender Integration
Free game engine for development of desktop, mobile, and web games
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
A modular Common Lisp game engine
Cross-platform 2D game engine focused on ultimate productivity
A re-implementation of Freelancer
The most powerful PowerShell module for fine-tuning Windows
Cross-platform, open source, and super fast MUD client with scripting
3D game engine/framework in C, with Luajit and Python bindings now