Awesome Open Source Games

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

Desktop/Android/HTML5/iOS Java game development framework

rhythm is just a *click* away!

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 🎢

One framework for creating powerful cross-platform games.

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

Classic Tomb Raider open-source engine

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

Doom 3 GPL source release

Direct port of the Bullet physics engine to JavaScript using Emscripten

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

Official NetHack Git Repository

MIT Licensed Open Source version of Torque 3D from GarageGames

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)

A fast and lightweight 2D game physics library.

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 framework written with osu! in mind.

Rogue Legacy Source Code

Brood War API

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

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

A free, single-player roguelike dungeon exploration game

Kiwi.js is a blazingly fast mobile & desktop browser based HTML5 game framework. It uses CocoonJS for publishing to the AppStore.

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

a 2D Game Development Framework

Automatically exported from code.google.com/p/micropolis

AssaultCube

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

Star Wars Jedi Knight: Jedi Academy

Wolfenstein 3D for iOS Source Release

Base environment for Red Eclipse and associated source files.

The MMORPG Meridian 59

Importer and scripts for Warcraft II: Tides of Darkness, the expansion Beyond the Dark Portal, and Aleonas Tales

MegaGlest real-time strategy game engine (cross-platform, 3-d)

Manic Digger - a multiplayer block-building voxel game, Minecraft clone

Open Source version of the award-winning physics platformer

XLE -- the "hackable" 3D game rendering engine

Romanov's Vengeance is an OpenRA mod based on Red Alert 2.

This is a game that was created for FTJ 2012 ("F This Jam")

Aquaria open source, forked from icculus.org due to inactivity. Has many enhancements compared to the original version.

2D Game

OpenLieroX - Liero clone / Worms realtime / 2D shooter

Caesar III (Open source remake)

Miner Wars 2081 Official source codes

Open Source J-RPG (Based on the Hero of Allacrost engine)