Citadel

"In the heart of this Forerunner structure, far above the troubled surface of the Ark, another battle rages."

- Bungie

Citadel is an upcoming Halo 3 map that will be shipped on September 22nd, 2009 with Halo 3: ODST, as a part of the Mythic Map Pack. The Shotgun Spree achievement is attainable on this map. The map is a section of the structure first seen in the Halo 3 Multiplayer map Epitaph, which is a Forerunner "cathedral" that towers over the Ark.

Achievements
This map has a Skull for the Multiplayer Achievements. When found, it unlocks the achievement Citadel Skull, which is depicted by the skull and a Forerunner glyph on the forehead. Another achievement for Citadel is Pull, given to the player for getting a shotgun spree on the map, worth an overall 25 Gamerscore.

Trivia

 * It has been confirmed this map takes place in the same tower-like Forerunner structure as Epitaph.
 * The map was first designed to be much bigger and originally had an elevator for each team, though these features have been removed for undisclosed reasons, most likely to reduce possible lag or eliminate possible glitches associated with such features.