These Unggoy serve as field officers to their comrades, and wear distinctive white-lilac or silver armour. They are numerous on Lumoria and are equipped with Plasma Rifles, although, one individual can be found on Installation 04, armed with a Void's Tear. When encountered in battle, these Grunts make use of Active Camouflage, perfectly adapting them for stealth operations and ambushes. They are part of the Covenant Special Operations division of the Covenant Special Warfare Group. These Unggoy are experienced and specially-chosen, usually commanded by the special operations Sangheili, and are given distinctive jet-black armour. Therefore, if the player manages to melee their methane tank off, they will die after a short amount of time. Their combat armor/harness has an integrated methane re-breather system, as Unggoy are unable to survive for long periods of time without methane due to asphyxiation much like humans without oxygen. Unggoy are the only Covenant species to breathe Methane rather than Oxygen. The Covenant used the high-breeding rate of the Unggoy to their advantage in the Human-Covenant War, where squads of Unggoy very frequently overpowered UNSC personnel through force of numbers. However, what Unggoy may lack in individual skill, they make up for with sheer numbers, high tenacity, also if they are focused, can be quite accurate with their weapons not to mention they breed at a remarkable rate. When witnessing their commanders eliminated during a battle, they often go into a panic and scatter in random directions. Unggoy are typically poor warriors in terms of skill, poor shots when not focused, slow, but strong for their size, and are generally on the whole, quite tactically inept. The Unggoy often share a bitter rivalry with the Kig-Yar, as both races constitute the lower cast levels of the Covenant. Due to their mistreatment, the Unggoy led several mass rebellions, until the Sangheili found them to be worthy to take up arms.

The Unggoy are a lowly slave race of the Covenant whose pathetic temperament often led them to face hazardous or worthless jobs that other Covenant races dare not to participate. 2 Rank Structure, Weaponry and Equipment.

Halo 1 grunt