Awesome Open Source Games

Godot Engine – Multi-platform 2D and 3D game engine

Cocos2d-x is a suite of open-source, cross-platform, game-development tools utilized by millions of developers across the globe. Its core has evolved to serve as the foundation for Cocos Creator 1.x & 2.x.

An open source re-implementation of RollerCoaster Tycoon 2 🎢

Luanti (formerly Minetest) is an open source voxel game-creation platform with easy modding and game creation

Flexible level editor

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

Simple and Fast Multimedia Library

OpenTTD is an open source simulation game based upon Transport Tycoon Deluxe

Space exploration, trading, and combat game.

An open source, turn-based strategy game with a high fantasy theme.

OpenMW is an open-source open-world RPG game engine that supports playing Morrowind. Main repo and issue tracker can be found here: https://gitlab.com/OpenMW/openmw/

The code base of SuperTuxKart

Written in C++ and using SDL, The Powder Toy is a desktop version of the classic 'falling sand' physics sandbox, it simulates air pressure and velocity as well as heat.

Open-source, cross-platform, C++ game engine for creating 2D/3D games.

Game engine

Doom 3 GPL source release

Direct port of the Bullet physics engine to JavaScript using Emscripten

A powerful free cross-platform RTS game engine. - Report issues at https://springrts.com/mantis/

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+

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

SuperTux source code

Descent 3 by Outrage Entertainment

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)

A retro multiplayer shooter

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

Open-source clone of the original X-Com 👽

[ARCHIVED] Modern reimplementation of the Diablo 1 game engine

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

A game of lonely space adventure

Brood War API

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

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

BananaBread is a C++ 3D game engine that runs on the web using JavaScript+WebGL+HTML

An open-source Tomb Raider 1-5 engine remake

Source code of open-source Colobot: Gold Edition project developed by Epsitec and TerranovaTeam

Compatible client of Ace of Spades 0.75

GemRB is a portable open-source implementation of Bioware’s Infinity Engine.

Main development repository for Rigs of Rods soft-body physics simulator

libRocket - The HTML/CSS User Interface library

Unvanquished is a free and open source FPS/RTS hybrid game powered by the Daemon game engine. Historically based on Tremulous as a continuation with decades of work over it.

Cross-platform port of Arx Fatalis, a first-person role-playing game

Source code of KeeperRL

⚔️ A cross-platform, open source, and super fast MUD client with scripting in Lua

Oxygine is C++ engine and framework for 2D games on iOS, Android, Windows, Linux and Mac

DDraceNetwork, a free cooperative platformer game

Star Wars Jedi Knight: Jedi Academy

This repository was moved to GitLab: https://gitlab.com/solarus-games/solarus

NOTE: development in stuntrally3 repo. 3D racing game based on VDrift and OGRE with own Track Editor. The main repository with Stunt Rally 2.x sources and data.