Protocol Dictates Action

Protocol Dictates Action is an Achievement in Halo: Reach and Halo: The Master Chief Collection.

Halo: Reach
In Halo: Reach the achievement is unlocked by completing the Campaign mission ONI Sword Base on Normal, Heroic or Legendary.

Halo: The Master Chief Collection
In Halo: The Master Chief Collection the achievement is unlocked by completing ONI Sword Base on any difficulty. The Xbox achievement artwork is a Halo: Reach concept art of Halsey's laboratory and the Forerunner vessel under Sword Base, as seen in The Package.

Trivia

 * The achievement's name is a direct quote from 343 Guilty Spark, when attacking John-117 in Installation 08's Control Room.