Deep Blue Arena is a small arena style death map that was converted from Quake 2.
It is a conversion of a Quake2 map by Maric who kindly allowed me to convert it to Kingpin. Deep Blue Arena is set in an underwater base and uses mostly custom textures.
It has 14 player spawns and has ample weapons and other items for a map of this size.
Just unzip all files to your Kingpin folder and they will be placed in the correct locations.