Copyright (C) 1993 id Software, Inc.
I release all modifications to the original IWAD as public domain; where this is not possible, I release them under the Creative Commons CC0 license.
It is my hope that Bethesda will look kindly upon this project as something that both serves a practical purpose (providing a useful base for "It Plays Doom!" projects) and continues to promote their game. I am not redistributing anything they have not already made available for free to the public, nor am I making any money off this project.