brutal-doom : A mod that attempts to make Doom faster placed, harder, gorier and more violent. ( https://www.moddb.com/mods/brutal-doom/ )
dhewm3 : A Doom 3 GPL source modification. ( https://github.com/dhewm/dhewm3 )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a gamerlay
For Paludis use this rsync : rsync://gentoo.zugaina.org/gamerlay-portage
If you have a problem : ycarus(-at-)zugaina.org