The symmetrical map was designed for one of Halo 4's new multiplayer modes, which has still yet to be revealed, and supports playing both on foot and in a variety of vehicles.
Halo 4 is set four years after the events of its predecessor and marks the return of iconic hero Master Chief, representing the beginning of a brand new saga.
The game's multiplayer will be split into two parts, Spartan Ops, which is the episodic co-operative element, and WarGames, the competitive side of the online experience.
343 Industries has said that the game is nearly finished, with the campaign playable from start to finish but still in need of more polish. Several weeks' worth of Spartan Ops content is in a similar state of completion, as are the ten multiplayer maps including Longbow.
Halo 4 will release exclusively on Xbox 360 on November 6 worldwide.