0ad : A free, real-time strategy game ( http://wildfiregames.com/0ad/ )
boson : real-time strategy game, with the feeling of CommandandConquer(tm) ( http://boson.sourceforge.net/ )
warzone2100 : [GIT] 3D real-time strategy game ( http://wz2100.net/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a rainyday
For Paludis use this rsync : rsync://gentoo.zugaina.org/rainyday-portage
If you have a problem : ycarus(-at-)zugaina.org