Re: [Trisquel-users] Doom/Doom II on Trisquel

[tegskywalker]

According to https://www.gnu.org/philosophy/nonfree-games.en.html as long as  
your game engine and related software is free/open/libre then the artwork can  
be commercial or whatever you want.

"Since the art in the game is not software, it does not need to be free.  
There is in fact free game software developed by companies, as well as free  
games developed noncommercially by volunteers. Crowdfunding development will  
only get easier."