The HTML5 Creation Engine: Create beautiful digital content with the fastest, most flexible 2D WebGL renderer.

📱 Collaborative List of Open-Source iOS Apps

Desktop/Android/HTML5/iOS Java game development framework

🎮 A list of popular/awesome video games, add-ons, maps, etc. hosted on GitHub. Any genre. Any platform. Any engine.

The automation tower defense RTS

CSS is powerful, you can do a lot of things without JS.

💿 Free software that works great, and also happens to be open-source Python.

♞ lichess.org: the forever free, adless and open source chess server ♞

rhythm is just a *click* away!

A retro game engine for Python

Open Source real-time strategy game engine for early Westwood games such as Command & Conquer: Red Alert written in C# using SDL and OpenGL. Runs on Windows, Linux, *BSD and Mac OS X.

An open source re-implementation of RollerCoaster Tycoon 2 🎢

A modern Wine wrapper for macOS built with SwiftUI

Free (as in freedom) open source clone of the Age of Empires II engine 🚀

The source code for 2048

🎮 Open-source, cross-platform 2D/3D/multiplayer game engine designed for everyone.

Flexible level editor

Ebitengine - A dead simple 2D game engine for Go

An open source re-implementation of Diablo 2

Cataclysm - Dark Days Ahead. A turn-based survival game set in a post-apocalyptic world.