This map has a discussion topic which can be visited here

dash_octagon is a labyrinth-like map that involves a mixture of gameplay. This map is GREAT for aim-map servers, as well as knife-only servers and different mods.

dash_octagon has a very spooky space-station like feeling to it with thick fog and volume lighting, tight hallways that intertwice into a octagonal labyrinth. Perfect for high numbers of players.