Sentinel
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Sentinel is a Forerunner term that refers to a class of autonomous machines designed for the construction, maintenance and protection of their structures and facilities.[1] Various Sentinel variants exist, each tailored to a specific task.
Types of Sentinels
Aggressors
- Main articles: Sentinel Aggressor, Sentinel Major
The Aggressor is the most common form of Sentinel, designed for the protection of Forerunner constructs and the small-scale suppression of Flood forms.[1] There are many forms of Aggressor, though most follow the same basic layout. In the event of a severe threat, the advanced version of the Aggressor, known as the Sentinel Major, would be dispatched to assist the more common Aggressors.
Assembler
Constructor
- Main article: Constructor
The Constructors are specialized Sentinels, designed solely for the construction and servicing of Forerunner structures.[1] It was these Sentinels that built and maintained the Sentinel Wall on Installation 05.
Enforcer
- Main article: Enforcer
The Enforcers are equipped with a variety of offensive and defensive weaponry, including heavy needlers, missiles, Sentinel beams, and dual energy shields covering both their top and bottom halves.[1] They are designed to handle major Flood outbreaks but are also capable of defending their installation from other external threats.
Protector
Retriever
- Main article: Strato-Sentinel
The Retrievers, otherwise known as the Strato-Sentinels, are massive terraforming machines, used to gather raw materials for large-scale Forerunner astroengineering projects such as the Halo Array.[1]
Watcher
Other types
Council Sentinel
A special variant of Sentinel was used aboard the Forerunner capital for security purposes. They possessed black armor, matching the black-and-red armor of Ecumene Council security personnel.
Onyx Sentinel
- Main article: Onyx Sentinel
Onyx Sentinels both guard and make up the shield world of Onyx. With a much more powerful individual energy beam, as well as the ability to combine themselves in order to increase their overall beam power, Onyx Sentinels are far more formidable opponents.
Sentinel Watcher
- Main article: Sentinel Watcher
Considerably larger than normal Sentinels, Watchers fill the same role of combating external threats.
Protector Sentinel
- Main article: Protector Sentinel
Roughly similar in appearance to regular Aggressors, Protectors are modular units capable of being modified into one of three variants - Offensive, which is a weaker version of the standard Aggressor; Shield, which projects an energy shield around its host unit; and Healing, which provides medical assistance to its host after combat.
Guardian Sentinel
- Main article: Guardian Sentinel
Little is known about this variant's specific purpose. The Guardian Sentinel has a single red "eye", which fires a significantly more powerful beam than the standard Aggressor.
Gatherer
- Main article: Gatherer
Gatherers seem to be exclusively deployed on Line Installations, and serve as collectors of biological specimens for the resident Monitor. They have offensive capabilities similar to Aggressors.
Unidentified Sentinel Variant
- Main article: Unidentified Sentinel variant
The largest Sentinel variant seen to date, this Sentinel is able to level entire cities with its weaponry.
Sources
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