Halo Nation

Narcozine Gas

9,960pages on
this wiki
Add New Page
Talk1 Share

Narcozine Gas is a chemical device used as a weapon by the UNSC. When inhaled, the gas quickly causes paralysis, and extended exposure causes pulmonary edema (swelling of fluid in the lungs), which can quickly become fatal due to suffocation and drowning.[1]

The UNSC didn't actually use the agent in battle. It was instead installed as a security measure in ONI bases, such as CASTLE Base, located on Reach, in order to neutralize potential threats to security. AIs inside these bases were given broad discretionary powers, with the power to use this gas on any humans who violate protocol and access classified information.[2] The AI Araquiel threatened to use this gas against Dr. Catherine Halsey at CASTLE Base on Reach. In return, Halsey activated the AI's fail-safe function, effectively erasing Araquiel.


  1. Halo: First Strike, page 127
  2. Halo: First Strike, pages 127-128

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.