0ad : A free, real-time strategy game ( http://play0ad.com/ )
0ad-data : Data files for 0ad ( http://wildfiregames.com/0ad/ )
freeorion : A free turn-based space empire and galactic conquest game ( http://www.freeorion.org )
ufo-ai : UFO: Alien Invasion - X-COM inspired strategy game ( http://ufoai.sourceforge.net/ )
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