Retriever Sentinel: Difference between revisions

The '''Retriever Sentinel''',<ref name="EVG"/> also known as a '''Strato-Sentinel''',<ref name="hitd103"/> is a type of [[Sentinel]] drone employed by the [[Forerunner]]s. Retrievers are designed to perform [[terraforming]] projects and capable of mining [[moon]]s, [[asteroid]]s, or other planetary bodies.<ref name="EVG"/><ref name="AH3">'''[[The Art of Halo 3]]''', ''page 32''</ref> Considered to be one of the more powerful variants of the Sentinel, Retrievers are massive, ship-sized drones that were utilized to construct installations of the [[Halo Array]] from [[Installation 00]], as well as to provide maintenance to the Ark itself.<ref name="hw2">''[[Halo Wars 2]]''</ref><ref name="pl retriever">'''Halo Wars 2''', ''[[Phoenix Log]]: Retriever Sentinel''</ref>

By [[2555#March|March of 2555]], 000 Tragic Solitude used [[Bobby Kodiak|a captured human]] to initiate the activation of the Halo Array. As expected by the [[ancilla]], the United Nations Space Command and [[Swords of Sanghelios]] reopened the Portal at Voi on Earth to reach the Ark. With the portal now open, Tragic Solitude sent a Retriever through the portal to gather Earth's resources to repair Installation 00, which sustained heavy damages in the aforementioned battle.<ref name="hitd203"/> As the Retriever began to strip mine the country of Kenya, the [[cruiser]] {{UNSCShip|Endeavor}} immediately responded by attacking the Sentinel. With the aid of several UNSC attack crafts, ''Endeavor'' was able to destroy the Retriever.<ref name="hitd107"/> As the UNSC and Sangheili team prepared to venture into the [[slipspace portal]] aboard ''[[Mayhem]]'', another Retriever suddenly exited—this time, heavily armed. However, the Sentinel was easily outmatched by ''Mayhem'' and was destroyed.<ref name="hitd118"/> When ''Mayhem'' entered the [[intergalactic space]] around the Ark, dozens of Retrievers attacked the [[SDV-class heavy corvette|corvette]] and managed to down the ship.<ref name="hitd122"/>

Doctor [[Luther Mann]] theorized that the dormant Retrievers could be reactivated and utilized to repair the Ark, opening slipspace portals to strip-mine uninhabited planets for the resources and minerals required to repair the Ark.<ref name="hitd361"/> In [[2557]], a human research team traveled to Installation 00 aboard ''[[Eden Rising]]'' to establish a permanent base on the Ark, [[Henry Lamb Research Outpost]]. Desiring to repair the installation, the researchers activated the dormant Retrievers,<ref name="pl henry lamb">'''Halo Wars 2''', ''Phoenix Log: Henry Lamb Research Post''</ref> under the guide and direction of the [[smart AI]] [[Isabel]]. To gain resources, the Retrievers were deployed to strip-mine lifeless planets. Before long, the Retrievers were able to enact repairs unsupervised,<ref name="old wounds"/> leading to Isabel and the researchers setting to the task of cataloging and analyzing the installation.<ref>'''Halo Wars 2''', ''Phoenix Log: Isabel''</ref> The Retrievers acted quickly and within months had largely restored the Ark to its former state,<ref name="pl retriever"/> as well as constructing another [[Installation 09|replacement Halo installation]] at the Foundry.<ref>'''Halo Wars 2''', campaign level, ''[[From the Deep]]''</ref>

However, in [[2558#October|October 2558]], the portal to the Ark had shut down again with the [[Banished]] arriving at the installation in the following month. The human researchers were killed by the Banished, while the Retrievers sought to defend their installation from the hostile invaders who were attempted to appropriate the installation for their own purposes.<ref name="pl retriever"/> In [[2559#March|March 2559]], {{UNSCShip|Spirit of Fire}} arrived over the Ark, where the ship's crew soon came into [[Second Ark Conflict|conflict]] with the Banished. During the resulting battle, UNSC forces managed to access the replacement Halo installation, having it depart the Ark's Foundry. In response, heightened automated security protocols were initiated and Retrievers were deployed to repel the invaders. While Banished and UNSC forces battled on the surface of the new Halo, a Retriever attacked forces from both sides. After UNSC forces managed to damage the Sentinel, the Retriever retreated for repairs. With UNSC forces taking accessing three nearby control towers, Professor [[Ellen Anders]] of ''Spirit of Fire'' soon found a way to manipulate the Ark's command codes and bypass directive locks, allowing her to take control of the Retriever. The UNSC utilized the Retriever to disable a nearby [[energy barrier]], giving them access to the Halo's [[control room]].<ref>'''Halo Wars 2''', campaign level, ''[[The Halo]]''</ref>

Retriever Sentinels also play a role in guarding Forerunner starfighters. Several protected the entrance of a [[Despair-class fighter|Forerunner starfighter]] hangar, attacking UNSC and Banished forces indiscriminately. Major Vaughan and the UNSC managed to destroy it, allowing them to destroy the starfighter before Banished could launch it to destroy the {{UNSCShip|Spirit of Fire}}.

Atriox later issued order to [[Pavium]] and [[Voridus]] to salvage material around High Charity crash site for their ongoing campaign against the humans, warning them not to go beyond the [[containment shield]]. Two Retriever Sentinels were dispatched to stop the Banished from reaching the crash site, but Voridus managed to shut down the Sentinel Defense Network, rendering all Sentinel operations inoperable. Ignoring Atriox's orders, Voridus breached the containment shield, releasing the Flood, which spread uncontrollably due to the Sentinels being disabled by the defense network. Once Voridus reactivated the defense network and Pavium cleared the launch sites clogged by biomass, Retriever Sentinels arrived to assist the Banished and lure the [[Proto-Gravemind]] out from its nest, effectively destroying it.