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

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

Flexible level editor

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

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

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

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.