Godot is a powerful cross-platform game engine
An open-source sandbox tower defense game
A cross-platform PSP emulator
A certain block game
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
Sandbox video game with a powerful physics engine
Voxel game-creation platform with easy modding and game creation
RetroArch is a frontend for emulators, game engines and media players.
The game engine for everyone
Desktop/Android/HTML5/iOS Java game development framework
One framework for creating powerful cross-platform games
Open-source Android/Desktop remake of Civ V
Open source voxel game engine with support for survival and crafting
Home theater software and entertainment hub for digital media
Turn-based survival game set in a post-apocalyptic world.
Cocos simplifies game creation and distribution with Cocos Creator
The source code to VVVVVV
Do virtual gear shifting (and more) in any rider app
An open source reimplementation of the Among Us Server
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Netcode that provides networking capabilities to GameObject workflows
Open source HTML5 game framework that offers WebGL and Canvas