Currently in portage there is games-fps/sauerbraten-2008.06.17 Current version of sauerbraten is 2010.07.08 http://sourceforge.net/projects/sauerbraten/files/sauerbraten/2010_07_19/sauerbraten_2010_07_28_justice_edition_linux.tar.bz2/download Reproducible: Always
sauerbraten-2010.07.28.ebuild is in portage.