Octagon
Octagon is a prototype arena featured via the Rocket Labs playlist in Rocket League. It was added to the game on September 8th, 2016. This arena has the shape of an equilateral octagon, much like its namesake.
This arena was reskinned to create the Starbase ARC arena. As a result, as of December 7th, 2016, this arena can only be played in exhibition or private matches.