An open-source sandbox tower defense game
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Desktop/Android/HTML5/iOS Java game development framework
Sandbox video game with a powerful physics engine
Godot is a powerful cross-platform game engine
UCI chess engine
A simple and easy-to-use library to enjoy videogames programming
A cross-platform PSP emulator
Open source cross-platform multi-purpose game toolkit
One framework for creating powerful cross-platform games
Open source HTML5 game framework that offers WebGL and Canvas
An iOS & tvOS Frontend for Multiple Emulators
RetroArch is a frontend for emulators, game engines and media players.
Fast and lightweight JavaScript game engine built on WebGL and glTF
The source code to VVVVVV
Open source voxel game engine with support for survival and crafting
Home theater software and entertainment hub for digital media
The game engine for everyone
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New Godot bindings for Swift
Netcode that provides networking capabilities to GameObject workflows
Urho3D Game engine
Free, open source game engine online
A cross-platform, open-source, pure C game engine for mobile game
An open source reimplementation of the Among Us Server