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https://github.com/id-Software/Quake

Quake GPL Source Release
https://github.com/id-Software/Quake

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Quake GPL Source Release

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README 

        

This is the complete source code for winquake, glquake, quakeworld, and 

glquakeworld.



The projects have been tested with visual C++ 6.0, but masm is also required 

to build the assembly language files.  It is possible to change a #define and 

build with only C code, but the software rendering versions lose almost half 

its speed.  The OpenGL versions will not be effected very much.  The 

gas2masm tool was created to allow us to use the same source for the dos, 

linux, and windows versions, but I don't really recommend anyone mess 

with the asm code.



The original dos version of Quake should also be buildable from these 

sources, but we didn't bother trying.



The code is all licensed under the terms of the GPL (gnu public license).  

You should read the entire license, but the gist of it is that you can do 

anything you want with the code, including sell your new version.  The catch 

is that if you distribute new binary versions, you are required to make the 

entire source code available for free to everyone.



Our previous code releases have been under licenses that preclude 

commercial exploitation, but have no clause forcing sharing of source code.  

There have been some unfortunate losses to the community as a result of 

mod teams keeping their sources closed (and sometimes losing them).  If 

you are going to publicly release modified versions of this code, you must 

also make source code available.  I would encourage teams to even go a step 

farther and investigate using public CVS servers for development where 

possible.



The primary intent of this release is for entertainment and educational 

purposes, but the GPL does allow commercial exploitation if you obey the 

full license.  If you want to do something commercial and you just can't bear 

to have your source changes released, we could still negotiate a separate 

license agreement (for $$$), but I would encourage you to just live with the 

GPL.



All of the Quake data files remain copyrighted and licensed under the 

original terms, so you cannot redistribute data from the original game, but if 

you do a true total conversion, you can create a standalone game based on 

this code.



I will see about having the license changed on the shareware episode of 

quake to allow it to be duplicated more freely (for linux distributions, for 

example), but I can't give a timeframe for it.  You can still download one of 

the original quake demos and use that data with the code, but there are 

restrictions on the redistribution of the demo data.



If you never actually bought a complete version of Quake, you might want 

to rummage around in a local software bargain bin for one of the originals, 

or perhaps find a copy of the "Quake: the offering" boxed set with both 

mission packs.



Thanks to Dave "Zoid" Kirsh and Robert Duffy for doing the grunt work of 

building this release.



John Carmack

Id Software