Godot is a powerful cross-platform game engine
A cross-platform PSP emulator
Open source voxel game engine with support for survival and crafting
Desktop/Android/HTML5/iOS Java game development framework
Open source HTML5 game framework that offers WebGL and Canvas
Open-source Android/Desktop remake of Civ V
The source code to VVVVVV
Stream switch games to your PC via USB or network
Do virtual gear shifting (and more) in any rider app
UCI chess engine
One framework for creating powerful cross-platform games
Source of Mana is a unique 2D MMORPG
Pokedex demonstrates modern Android development with Hilt
Xash3D FWGS engine
Voxel game-creation platform with easy modding and game creation
Netcode that provides networking capabilities to GameObject workflows
RetroArch is a frontend for emulators, game engines and media players.
Open source cross-platform multi-purpose game toolkit
Sandbox video game with a powerful physics engine
An open source reimplementation of the Among Us Server
A simple and easy-to-use library to enjoy videogames programming
The game engine for everyone
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Satisfying monster shooter
Solar2D Game Engine main repository (ex Corona SDK)