Hi, rRootage is a very very cool Shootem up game using Bullet Markup Language and OpenGL. so this is depending on a library for Bullet Markup Language, such as libbulletml in bug#45038. Thank you.
Created attachment 32865 [details] rrootage-0.23.ebuild
Created attachment 32866 [details, diff] rrootage-0.23-gentoo.patch (a patch for make it actually work in Linux)
The homepage should actually be http://www.asahi-net.or.jp/~cs8k-cyu/windows/rr_e.html Also, there seems to be a SF project ... I'm not sure if this is official or not: http://rrootage.sourceforge.net/
Sorry, I didn't know English page existed. Also rRootage SF project seems consented by home. here is an ebuild for rRootage SF project version.
Created attachment 36105 [details] rrootage-0.23a.ebuild (SF project version)
games-action/rrootage added to portage. Thanks for the bug report and ebuild.