Godot is a powerful cross-platform game engine
An open-source sandbox tower defense game
Stream switch games to your PC via USB or network
A cross-platform PSP emulator
A simple and easy-to-use library to enjoy videogames programming
Open source cross-platform multi-purpose game toolkit
Xash3D FWGS engine
UCI chess engine
A certain block game
Sandbox video game with a powerful physics engine
Desktop/Android/HTML5/iOS Java game development framework
RetroArch is a frontend for emulators, game engines and media players.
The game engine for everyone
Home theater software and entertainment hub for digital media
Open source voxel game engine with support for survival and crafting
Open-source Android/Desktop remake of Civ V
One framework for creating powerful cross-platform games
Do virtual gear shifting (and more) in any rider app
Voxel game-creation platform with easy modding and game creation
Open source HTML5 game framework that offers WebGL and Canvas
The source code to VVVVVV
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
An open source reimplementation of the Among Us Server
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Netcode that provides networking capabilities to GameObject workflows