openarena : Open-source replacement for Quake 3 Arena ( http://openarena.ws/ )
uhexen2 : Hexen 2 port - Hammer of Thyrion ( http://uhexen2.sourceforge.net/ )
xonotic : Fork of Nexuiz, Deathmatch FPS based on DarkPlaces, an advanced Quake 1 engine ( http://www.xonotic.org/ )
xonotic-data : Xonotic data files ( http://www.xonotic.org/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a gentoo-playground
For Paludis use this rsync : rsync://gentoo.zugaina.org/gentoo-playground-portage
If you have a problem : ycarus(-at-)zugaina.org