No README file or compilation instructions
I downloaded the source archive, xonotic-0.8.0-source.zip. When I extracted the archive, I found there was no README file. I could find no build instructions on the website. I looked in the Makefile, set the PREFIX environment variable, ran make and nothing happened. I spoke to some of the denizens of the IRC channel #xonotic on freenode. They suggested that I file a bug here.