What is the legal status of Chocolate Doom?
Chocolate Doom is distributed under the GNU General Public License, version 2. It is derived directly from the original Doom source code published by id Software; the source code repository (https://chocolate-doom.svn.sourceforge.net/svnroot/chocolate-doom/) contains the complete history of all of the changes that have been made, back to the original version. The source code to Heretic and Hexen was also made available under the GPL by Raven Software in 2008. Since then, work has been underway to integrate the Raven code into Chocolate Doom on the raven-branch.