dhewm3 is the game engine for the DOOM 3 game. Please note, to play the game you'll need
the game data which cannot be distriuted by Debian
Please note that you have to patch your game data to version v1.3.1.
See /usr/share/docs/dhewm3/README.Debian for details and how to package the game
data for local installation.
https://github.com/dhewm/dhewm3, /usr/share/docs/dhewm3/README.Debian JUNE 2014 DHEWM3(6)