Godot is a powerful cross-platform game engine
A cross-platform PSP emulator
Stream switch games to your PC via USB or network
Xash3D FWGS engine
UCI chess engine
A simple and easy-to-use library to enjoy videogames programming
The game engine for everyone
Desktop/Android/HTML5/iOS Java game development framework
Sandbox video game with a powerful physics engine
RetroArch is a frontend for emulators, game engines and media players.
One framework for creating powerful cross-platform games
Open source voxel game engine with support for survival and crafting
Do virtual gear shifting (and more) in any rider app
Open-source Android/Desktop remake of Civ V
Open source HTML5 game framework that offers WebGL and Canvas
Home theater software and entertainment hub for digital media
The source code to VVVVVV
An open source reimplementation of the Among Us Server
Voxel game-creation platform with easy modding and game creation
Pokedex demonstrates modern Android development with Hilt
A dead simple 2D game engine for Go
Netcode that provides networking capabilities to GameObject workflows
Multi-platform 2D and 3D game engine
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
scene-oriented, flexible 3D engine (C++, Python, C#, Java)