• Register
Post feature RSS Freedoom FAQ

Since Freedoom's inception, several people have made attempts to commercially exploit it. For the most part, doing this is perfectly legal, but every now and then this subject comes up..

Posted by on

Since Freedoom's inception, several people have made attempts to commercially exploit it. For the most part, doing this is perfectly legal, but every now and then this subject comes up and I think it's worth writing an FAQ about it. Hopefully this thread can be linked to in future whenever this subject comes up.

Is it legal to sell Freedoom or modified versions of Freedoom?

Yes. Freedoom is licensed as Free software, and the ability to sell it and distribute modified versions is a requirement for it to be considered free.

There is a single restriction: the Freedoom license (the modified BSD license) requires that a copy of the license be distributed with all copies. This guarantees attribution to the Freedoom team.

I found a rebranded version of Freedoom on the app store for my favorite mobile phone. Isn't this bad?

In a way it's actually good, as it's making Freedoom available to more people. However, some people are understandably uncomfortable when the uploader is charging a fee, especially if they haven't done much work to provide the port.

If you really dislike this, the best thing to do is to compete: make your own Freedoom package and make it available for free. This makes Freedoom available to even more people. Alternatively you could charge a small fee as well and donate to the money you make to charity (like the Free Software Foundation, which hosts Freedoom's website).

The person selling Freedoom hasn't included any credit to the project. What should we do?
Technically if they don't include a copy of the Freedoom license then they're in violation of it. Sometimes people don't realise they have to do this, so the best thing to do is send a politely-worded email to them.

Couldn't we change the license to stop this?

The Freedoom project was started to create an IWAD file that is free software. If commercial use was prohibited, it would no longer meet the definitions of free software or open source. This would be a worse situation, because Freedoom would then be removed from distributions of various free operating systems - Debian and Ubuntu are examples.

Charging a fee for copies of Freedoom isn't really within the spirit of the project, but apart from potentially bruising some egos it doesn't cause any real harm, and the alternative is worse. It's better to stick with a free license because it better fits into the larger ecosystem of Free Software in which Freedoom exists. The Doom source code itself, for example, is released under the GNU GPL, which allows the same thing.

Submitting your work

If you want to submit something, great! Here's what you do:

  2. Check to make sure that the resource has not already been replaced. Existing resources should only be replaced if lots of people seem to dislike them or there is some other problem with them: dont bother remaking something if theres no problem with whats already there.
  3. Check to see if the resource has been assigned to someone else. You can do this by checking the assignment status in the files here. (click e.g. "flats_list" to see the list of assigned flats).
  4. Complete the resource, then...
  5. Upload it to Free.doomers.org within a .zip containing a text file with your name/email so we know who it has come from :) Please put your name in the zip filename, eg fraggle_candlesprites.zip

PLEASE PLEASE PLEASE don't submit material covered by a license that does not comply with our own - basically, it has to be free to be modified and used by other people without restriction(including selling it). Most web graphics for example are provided free only for non commercial use, so are no good. There is more information on this in the README file. As a general rule, if you did not make 100% of it yourself, get it cleared.

Submissions fixing broken maps, etc. are very welcome.

If you have any questions please start a new thread in the forum (or use an existing, non-stuck one). The older thread with submission instructions contained pages and pages of stuff that was hard to track whether it was up-to-date or not.


Freedoom is currently beta-quality material. Please report bugs you encounter. Be sure to mention the source port you are using and how to reproduce the problem.

Post a comment
Sign in or join with:

Only registered members can share their thoughts. So come on! Join the community today (totally free - or sign in with your social account on the right) and join in the conversation.