Godot is a powerful cross-platform game engine
An open-source sandbox tower defense game
Open source HTML5 game framework that offers WebGL and Canvas
A certain block game
RetroArch is a frontend for emulators, game engines and media players.
A simple and easy-to-use library to enjoy videogames programming
Xash3D FWGS engine
The game engine for everyone
Desktop/Android/HTML5/iOS Java game development framework
UCI chess engine
One framework for creating powerful cross-platform games
An open source reimplementation of the Among Us Server
Netcode that provides networking capabilities to GameObject workflows
Home theater software and entertainment hub for digital media
The source code to VVVVVV
Cocos simplifies game creation and distribution with Cocos Creator
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
A dead simple 2D game engine for Go
Do virtual gear shifting (and more) in any rider app
New Godot bindings for Swift
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Multi-platform 2D and 3D game engine
Open source library for creative expression on the web, desktop, etc.
Free, cross-platform 2D game engine powered by Haxe and OpenFL
Action-adventure game originally released in 2013