Come Chat with us live! Learn how HERE!
http://tremcentral.com/base/map-subterranean_0-1.pk3
Get an updated client with wwwdownload..
http://trem.tjw.org/backport/linux/If you installed tremulous from synaptic or apt-get you won't be able to update the client unless you uninstall it and reinstall from tremulous.net/files.