Hi, I revived the good old XQF project that was a popular game server browser some years ago.
I have rewriten some deprecated code (many old things remaining) to allow it to compile and to be packaged by modern GNU/Linux distros. I have added many games, and Unvanquished is one of them. The 1.0.6 version was published October 26, 2014.
As you can see in this picture, I have added some Tremulous derivatives, not only Unvanquished, since some people in this forum have expressed this need.
You can read the official announcement here: http://www.linuxgames.com/xqf/
and a detailed changelog here : News
The source code has been moved to GitHub : https://github.com/XQF/xqf/ , the issues list too.
For historic reason, it’s a GNU/Linux software only. XQF 1.0.6 is not already distributed by Debian and Ubuntu but they already have compiled it, so you can get it here for Debian (see the bottom of the page) or here for Ubuntu (see the “Builds” list on the right) for many platforms.
This release does not aim to be perfect, but to revive a project that was dormant since 2008 (last official announce in 2006 !), therefore, I invite you to test and report bugs you find, and if you know how to correct it, do not hesitate to fork the repo and suggest fixes.