Free Code Game Engines

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Directory

Maintained by Strypey on Disintermedia [1]:

3D General

Crystal Space - LGPL license, programmed in C++


3D Open World

WorldForge - a 3D engine developed by the WorldForge project, under a combination of GNU GPL, LGPL, and other GPL-compatible licenses

Ryzom - a 3D engine (client and server) released to the FSF by Winch Gate Ltd in 2010, under GPL/AGPLv3.

Meridian 59 - a 3D MMORPG engine developed as proprietary software by a commercial operator, and released into community development under the GPL in 2012. Only runs on Windows as of March, 2016 (might work in WINE?).


3D First Person Shooter

Cube - developed under the zLib license, a non-copyleft free software license

DarkPlaces - forked from the Quake engine, both of which are licensed under the GNU GPL

Doomsday and Gloome - rewrites of Doom (Doom engine released under GNU GPL by ID Games)

Torque 3D - "MIT'" licence, oriented towards Windows and browser games, although it also supports GNU/Linux and MacOSX.


3D Fighting

Lugaru - developed in the C language by Wolfire games and released in August 2009, details about this game are sketchy but the screenshots look epic! The codebase is orphaned, but some amazing games could be build if new developers were found. Wikipedia states that the code, now hosted at BitBucket, is under GPL, and the game data is proprietary. There are Debian packages but not sure which repo, so that doesn't help.


3D Constructor

Irrlicht - a C++ 3D Engine under the zLib license, and used a wide range of games projects including..

Minetest, a MineCraft-like engine forked from Irrlicht, and released under LGPL 2.1


2D and 3D

Godot - a full game IDE developed in C and C++ by an Argentine game studio and released under the Expat ("MIT") license. Used in a number of libre games including DynaDungeons (GNU GPLv3), and Tanks of Freedom (Expat)


Top Down Realtime Strategy

Pyrogenesis - Developed by Wildfire Games for 0AD, and released under the GNU GPL

Stratagus - Used in BOS Wars, Doom Wars, Wargus, and Wyrmsun, developed under the GNU GPL

Spring - Developed under GPLv2, and used in a wide range of games, some with libre art from the historical (Spring: 1944), to the futuristic (Zero-K), to the abstract (Kernel Panic), some with proprietary art (Star Wars: Imperial Winter).


Top Down Turn-Based Strategy

Battle for Wesnoth - GPL


==2D Fighter--

OpenBOR - intended for Street Fighter side-scrolling style games, this "BSD" licensed engine is written in C and uses OpenGL, Framebuffer, and SDL

OpenOMF - released under an "MIT" license, this is a remake of a DOS game, One Must Fall 20


2D Side-scrolling Platformer

PGE (Platform Game Engine) - a project to create a GNU GPLv3 engine to support Super Mario mods like SMBX

SGE (pronounced "sage") - a 2D engine originally developed for a game called Stellar, currently used by PaceWar


HTML5 Games

Phaser - This Expat ("MIT") licensed engine has been used for a wide variety of games, including Angry Birds Space

Turbulenz - Another Expat ("MIT) licensed engine dependent on WebGL, used for a range of 2D and 3D animated games on the Turbulenz site


Music and Dance

Stepmania - a DanceDanceRevolution style game, whose engine is developed under a non-copyleft free license

Frets on Fire - A live guitar playing game, whose engine, based on PyGame, is developed under the GNU GPL

UltraStar - A SingStar-style game developed by SterGames in Kylix/ Delphi, under GNU GPL 2, with ports for GNU/Linux and OSX in C++. Unfortunately, the original developers moved to proprietary development (and appear to have gone bust around 2012), but source code is still available on SourceForge, and a number of forks and rewrites exist such as UltraStarDeluxe.

Performous - An engine for games based on singing, instrument simulation, and dance, licensed under GNU GPL 2. Began as a C++ rewrite of UltraStar, targeted at GNU/Linux.


Collections

Repositories of games which have either released their source or been developed as free code

Internet Archive Game Source Code Collection

Wikipedia List of Open Source Video Games

Free Software Directory list of Free Code Games

Lee Reilly's list of game-related projects on GITHub

(https://www.coactivate.org/projects/disintermedia/libre-game-development)


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