One thing I don’t like about Nexuiz is that most servers do not use the maps that come with the game, so every time you play, you have to wait for it to download the map, first. Tremulous, however . . . :yes:
And if you don’t care so much about graphics, and more about gameplay, there’s www.abandonia.com. if such a site is permitted to be mentioned here ;). All the oldies and goodies, some of which are 3D (such as Alone in the Dark).