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

Official NetHack Git Repository

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

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)