Omega Halo

Omega Halo was one of the original main array of twelve 30,000-kilometer-wide Halos.

Construction and commissioning
Unlike the other six rings in the final Halo Array, Omega Halo was manufactured at the greater Ark instead of Installation 00 or the "lesser Ark". As a result, it was originally three times the size of a normal Halo ring (30,000 kilometers in diameter). Like the other Halos, Omega Halo served a secondary purpose as a Lifeworker preserve for biological specimens from across the galaxy as part of the Conservation Measure. Omega Halo was primarily dedicated to humans, being home to various species and subspecies of the human genus, alongside numerous fauna and flora. The humans living on the installation identified themselves as Tudejsa. These humans were allowed to build their own societies and were mostly left undisturbed by the Forerunners. Some of the humans even managed to construct rudimentary cities.

Battle of the Capital
During the Battle of the Capital, Omega Halo was the only one of the seven rings under Forerunner control that successfully made it through a nearby slipspace portal and return to the greater Ark, but was severely damaged by the stress of the transition, with the other six breaking up in-slipspace. Because the damage the ring took after the battle, Omega Halo was not part of the Halo Array created by the Librarian.

List of appearances

 * Halo: Cryptum (Not mentioned by name)
 * Halo 4 (Terminals)
 * Halo: Silentium