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