Awesome Open Source Games

Traditional roguelike game with pixel-art graphics and simple interface

Terasology - open source voxel world

Command the forces of The Project in a battle to rebuild the world after mankind has been nearly destroyed by nuclear missiles. A 100% free and open source real-time strategy game for Windows, macOS, Linux, BSD+

Drivers and libraries for the Xbox Kinect device on Windows, Linux, and OS X

Official NetHack Git Repository

A modular, extendable, and easy-to-use physics engine for javascript

Information about signing up for a free Epic Games account, and getting access to UnrealEngine source code.

JavaScript Game Engine

The Atomic Game Engine is a multi-platform 2D and 3D engine with a consistent API in C++, C#, JavaScript, and TypeScript

MIT Licensed Open Source version of Torque 3D from GarageGames

Lightweight 3d physics engine for javascript

Cocos2d for Web Browsers. Built using JavaScript.

This is the master Information repository for MaNGOS

The Cross Platform Game Engine

SuperTux source code

Descent 3 by Outrage Entertainment

No description.

Dungeon Crawl: Stone Soup official repository

[DEPRECATED] Git mirror of the 0 A.D. SVN source code (migrated to https://gitea.wildfiregames.com on August 20th 2024)

The ioquake3 community effort to continue supporting/developing id's Quake III Arena

🎮 The best way to play your itch.io games

A retro multiplayer shooter

2D HTML5 rendering and layout engine for game development

Fast paced HTML5 puzzle game inspired by Tetris!

A fast and lightweight 2D game physics library.

Community effort to maintain and improve Jedi Academy (SP & MP) + Jedi Outcast (SP only) released by Raven Software

The first level of Super Mario Bros made with Python and Pygame.

Free, cross-platform 2D game engine powered by Haxe and OpenFL

Open-source clone of the original X-Com 👽

[ARCHIVED] Modern reimplementation of the Diablo 1 game engine

Freeciv-web is an Open Source strategy game implemented in HTML5 and WebGL, which can be played online against other players, or in single player mode against AI opponents.

A web-based roguelike written in Dart.

The official Allegro 5 git repository. Pull requests welcome!

Advanced rhythm game for Windows, Linux and OS X. Designed for both home and arcade use.

Python MUD/MUX/MUSH/MU* development system

A puzzle game inspired by functional programming

A game framework written with osu! in mind.

Rogue Legacy Source Code

A game of lonely space adventure

The Turn Based Strategy Game/eSport. Master your beasts! 🐺

Source code of HexGL, a futuristic HTML5 racing game

3d city builder game

Brood War API

:bird: :video_game: A MelonJS port of the famous Flappy Bird Game

a node.js plugin to integrate nw.js/electron games with steamworks

A completely free, open-source, 2D game engine built on proven torque technology.

Open source release of Canabalt for iOS

Multiplayer top-down shooter made from scratch in C++. Web version: https://play.hypersomnia.io Made in 🇵🇱

A free and open-source Touhou Project fangame

Unknown Horizons official code repository