make_desktop_entry ${PN} Tremulous ${PN}.xpm should read. make_desktop_entry ${PN} Tremulous ${PN}.xpm "Game;ActionGame"
*** Bug 155849 has been marked as a duplicate of this bug. ***
The fix would presumably be to change line 819 of eutils.eclass to: action|fps) type=ActionGame;;
*** Bug 155851 has been marked as a duplicate of this bug. ***
fixed