Code Omega Three was a UNSC emergency code. This code, to be used during combat operations, chilled any soldier to the core.

Omega Three was the final panic code, an order to break and run no matter what the cost. This code was used only in extreme situations, when a combat situation suddenly turned extremely grim for the UNSC forces and they would be massacred if they did not immediately retreat.[1]

It was used in Operation: TORPEDO in 2545 when seven Covenant cruisers arrived on Pegasi Delta to halt the SPARTAN-III's attack on the Covenant refinery there. Except for Tom-B292 and Lucy-B091, who managed to jump into the water before they were hit, all of the SPARTAN-III's in Beta Company were killed by the plasma bombardment from the Covenant cruisers and any other survivors were finished by the massive explosion of the refinery.[2]


  1. Ghosts of Onyx page 22
  2. Tom saw the Covenant cruisers over the field. Lances of laser fire rained down from the ships' lateral weapon arrays and blasted his fellow Spartans. Firepower meant for capital ship combat… how could anyone survive that? A new sun appeared. The supercritical core flared and light filled the world. The cruisers rippled, distorted, their alloy skins boiling away in the heat. They disintegrated, bits blasted outward.
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