Godot is a powerful cross-platform game engine
UCI chess engine
A certain block game
Xash3D FWGS engine
An open-source sandbox tower defense game
One framework for creating powerful cross-platform games
A simple and easy-to-use library to enjoy videogames programming
The game engine for everyone
Desktop/Android/HTML5/iOS Java game development framework
Cocos simplifies game creation and distribution with Cocos Creator
Open source HTML5 game framework that offers WebGL and Canvas
Free, cross-platform 2D game engine powered by Haxe and OpenFL
RetroArch is a frontend for emulators, game engines and media players.
An open source reimplementation of the Among Us Server
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Multi-platform 2D and 3D game engine
Open source library for creative expression on the web, desktop, etc.
Home theater software and entertainment hub for digital media
Do virtual gear shifting (and more) in any rider app
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Netcode that provides networking capabilities to GameObject workflows
The source code to VVVVVV
A dead simple 2D game engine for Go
Cross-platform game engine in Rust
New Godot bindings for Swift