In portage, there's version 0.7.4. But according to http://www.linux-games.com/castle-combat/, 0.8.0 is the most current. Download URL needs to be changed to http://prdownloads.sourceforge.net/castle-combat/castle-combat-0.8.0.tar.gz?download
The old ebuild doesn't work anymore.
Look for previous bugs more. *** This bug has been marked as a duplicate of 111305 ***