Mangos ZERO is a server for World of Warcraft
A cross-platform PSP emulator
Voxel game-creation platform with easy modding and game creation
A certain block game
Desktop/Android/HTML5/iOS Java game development framework
A simple and easy-to-use library to enjoy videogames programming
Xash3D FWGS engine
Stream switch games to your PC via USB or network
UCI chess engine
An open source reimplementation of the Among Us Server
Netcode that provides networking capabilities to GameObject workflows
One framework for creating powerful cross-platform games
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
The game engine for everyone
Powerful, mature open-source cross-platform game engine for Python
Home theater software and entertainment hub for digital media
Open-source engine for Heroes of Might and Magic III
Cocos simplifies game creation and distribution with Cocos Creator
Solar2D Game Engine main repository (ex Corona SDK)
A pure Go game engine
New Godot bindings for Swift
Multi-platform 2D and 3D game engine
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
A completely free, open-source, 2D game engine
Open source library for creative expression on the web, desktop, etc.