A modification of Xonotic which included extended weapons, maps, vehicles, buildable buildings, mounted weapons, spell casting, monsters, player characters, textures, and game mode (such as colorwar (think liquidwar))
To pick up items press F.
To enter vehicles/mountedguns press F.
To reload press R.
To walk press W A S D (direction)
To jump press SpaceBar
Main QuakeC repo (This is where the game code is edited):
http://chaosesqueanthology.git.sourceforge.net/git/gitweb.cgi?p=chaosesqueanthology/xonotic-data.pk3dir;a=summary
Source for the media:
http://chaosesqueanthology.git.sourceforge.net/git/gitweb.cgi?p=chaosesqueanthology/mediasource;a=summary
Other data, maps, etc are in the .iso
DVD Case and DVD Labels:
http://chaosesqueanthology.git.sourceforge.net/git/gitweb.cgi?p=chaosesqueanthology/mediasource;a=tree;f=dvdpaper;h=eafa62bab61a517d30407db878a764e9eacc3b88;hb=HEAD