The universe is a massive place. Not only that, but it is constantly expanding , so it is only getting bigger. That said, it might make you wonder how Forerunners planned to rid the universe of Flood using Halo rings that numbered only in the single digits.
The range on these installations will surprise you. After being fired, each Halo ring has a range of 25, light-years. That means any sentient life-forms within that range from one of the seven rings of the Halo Array is in danger. Upon first encountering the Flood, the Forerunners did not automatically assume they were going to lose the war against their voracious foe. It took them around years to realize that their defeat was inevitable.
After that time was when the Forerunners began planning the construction of the Halo rings as a last-ditch attempt to thwart the Flood's galaxy-consuming intentions. As evidenced in several Halo games, only a single Monitor oversees the operation of a Halo ring. The first Monitor players are introduced to is obviously Guilty Spark. In terminals found in Halo: Combat Evolved Anniversary , gamers discover that Guilty Spark had hesitations about this set-up.
He questioned the foresight of the Forerunners in leaving Monitors without companionship during their long and lonely vigil. For a weapon of such destructive potential as a Halo ring, it feels like a huge risk to have a single location where the entire Array can be activated.
However, that is exactly the function Installation 00 serves to fulfill. Known as the Ark and introduced to players in Halo 3 , this starfish-shaped construction that hangs in space is the one place that can initiate the wipe-out of every sentient being in the galaxy. The Flood, the parasitic antagonists of the first three Halo games, can take over sentient life forms.
That means that if the Halo Array wants to get rid of the Flood's food source, it has to go after sentient beings. The key word there is "sentient. What that means in practice is that the Halo rings' Pulse has the capacity to identify sentience in living beings. This is a good thing for any smaller life forms that do not possess sentience, as the Pulse will just pass them by.
Sentience is made possible by a creature's nervous system, so that is what a Halo ring's Pulse targets. In essence, it overloads neurons and other similar cells in a nervous system to the point of annihilation.
Just thinking about the kind of feat in engineering this is boggles the mind. The Forerunners not only had a firm grasp on planetary-scale constructions, but they must have also had immense knowledge of the intricacies of cellular structures in order to target specific types of cells in a creature's body.
The Halo universe exists in a separate reality than the one we know. In the game's narrative, the Forerunners and the Halo Array played an important role in how humans came to be on Earth. As such, while we don't have records of Forerunner activity in our reality, Halo's Earth does. The Master Builder intended to allow these specimens to be infected by Flood forms contained on the rings, and then subsequently terminated in order to test the Halos' effectiveness. Installation 04 and Installation 05 supported warm, temperate forests [78] that were both deciduous and coniferous, swamps, and cold, snow covered tundra environments.
While the terrain of a Halo ring may appear to be naturally formed at first glance, it is actually artificially constructed. Strato-Sentinels extract raw materials from the source, process them in transit, and deposit building materials at the Installation. These factories also hold in the ring's nitrogen-oxygen atmosphere, which is then leaked out to the surface, eventually pouring through the superstructure, and tugged in place by centripetal force; [84] massive walls lining both sides of the ringworld prevent the atmosphere from leaking out into space.
An intricate layer of metallic panels is laid down several meters below the surface of the terrain, upon which rock, soil, and eventually vegetation is added.
Slopes, hills and mountains can be created by sculpting these panels. Others, such as the frigid conditions of the Quarantine Zone or the lake near the Temple on Installation 05 were artificially created.
The structures seen on the surface of the installations are built as part of the underlying structure, with the terrain then "printed" on top of them, creating the appearance of structures built into the surrounding landscape when the inverse is in fact true. Each Halo has several assets that are uniform to all installations.
Each contains a control room located somewhere upon its inner surface. The control room houses the installation's mainframe, known as the Core , from which all of the Halo's systems can be operated. The Halo's main weapon can be activated inserting the Activation Index into the Core; on the other hand, the Core may also be used to disable the main weapon.
Installations also possess Cartographer facilities, which contain the complete, real-time record and schematic of the installation, [87] including its inner passages and networks, to be used as a navigational reference for traversing the installation. Flood containment and research facilities are also standard, used by the installation's monitor to conduct research on and observe the surviving Flood specimens; these are protected by Sentinels to prevent an outbreak.
Facilities of the Halo Array contain advanced teleportation grids , allowing instantaneous transportation for a Monitor or Reclaimer to any place on the installation. Under normal circumstances, these grids cannot be accessed by the Flood, though the Gravemind was able to use that of Installation 05 by controlling Penitent Tangent. The Halo installations are also equipped with drive engines spaced along their rim. In the case of at least the original twelve rings, a failsafe measure implemented in the event of capture by hostile forces would transition the Halo into slipspace and place it on a collision course with a planet or other celestial body, ensuring the weapon's destruction rather than allowing it to fall in the wrong hands.
The seven installations in the final Halo Array function via form of lethal radiation designed to kill all sentient life in the installation's three-dimensional radius of 25, light-years; when fired in concert with the rest of the Array, this sterilizing effect covers the entire galaxy. When activated, the Halo rings release a burst of cross-phased supermassive neutrinos.
Fine tuning the pulse can also allow for selective extermination of lifeforms with varying degrees of neural complexity. Like virtually all Forerunner technology, the Halos are powered by vacuum energy. When the main weapon is fired, vacuum energy is siphoned from local space-time to near-depletion.
A concentration of energy collects into the hub of the installation, which, when the weapon is fully charged, blasts outward in all directions. The radiation is propelled at superluminal speeds and will eventually propagate at a near-infinite velocity. This was known to generate causal paradoxes when the rings first fired, with two of the Halos reporting pre-echoes of the combined activation before the rings had been fired.
In the event a Halo's activation is canceled, a burst of energy is fired from the control center into the hub, causing the energy collected there to violently implode, then dissipate harmlessly.
The final Halo Array, comprising the six smaller Halos and the reduced Installation 07 were designed to fire in all directions, within a spherical radius of 25, light-years; [18] together, the rings were capable of killing all sentient life within three radii of the Milky Way's center.
When fired from the greater Ark to the Large Magellanic Cloud , the blast was wide enough to cover the entire 14, light-year-wide satellite galaxy. The nervous systems of all beings are targeted by the Halos and destroyed, rendering them useless to the Flood; however, the Halo effect does not disintegrate biomass, leaving the victims' bodies mostly intact.
Therefore, Lifeworkers sprayed target biospheres with a solute that would cause any animal killed by the Array to instantly decay into its component molecules, [99] resulting in flash-desiccation. However, in the Ross-Ziegler Blip revealed a tiny aberration in Earth's fossil records. The only known ways to avoid the effects of the pulse are to seek shelter in a shield world or to escape outside the range of the Array.
Flood aboard High Charity also survived the firing, but Installation 00 's Sentinels were able to contain those that survived with a containment shield around the ruined structure. Halo Installations make use of Composer technology to an unknown degree as part of their firing. Each Halo ring can be activated individually by a Reclaimer , also placing the other installations in standby mode, or they can all be activated simultaneously from Installation In the event of a major Flood outbreak, an installation's monitor will seek out a Reclaimer if available, whom they will enlist to aid them.
It will teleport them to the installation's Library and will assist the individual in retrieving the Index. The monitor then stores the Index within its data arrays for safe transportation, lest the Reclaimer fall prey to the Flood before they can activate the installation. Once at the control room, the Reclaimer is given back the Index and must insert it into the Core in order to begin the activation sequence. At any point during the charging sequence, a Reclaimer is able to abort the firing by removing the Index from the Core.
Each Halo ring has its own defenses, though Sentinels from Installation 00 are always deployed at a newly constructed ring to finalize preparations to launch it. Retriever Sentinels are also stored inside the rings and will deploy automatically to attack anything deemed a threat.
UNSC Pillar of Autumn was initially tagged as a hostile by Guilty Spark using Installation 04's Confidence -class defense system, but was given clearance after scans revealed that humans were aboard.
The installations in the neoteric [10] Halo Array are numbered in the order they were built in, [23] while their alphabetical designations were assigned in the order in which they were fired, with Alpha Halo being the first ring to fire. Installation 04 in Halo: Combat Evolved. Broken Installation 04 in The Mona Lisa. Installation 04 in Halo: Combat Evolved Anniversary. Installation 03 ejecting a section of itself in Halo: Escalation.
Installation 05 in Halo 2: Anniversary. A post-war human station near an unknown Halo installation in A Hero Falls. Installation 03 in Halo: Spartan Strike. Alpha Shard in Halo Mythos. Article Discussion Edit History. For other uses, see Halo disambiguation. Installation 05 in Halo 2. Installation 08 in Halo 3. Installation 03 in Halo 4. Alpha Shard in Halo: Nightfall. A Halo in Halo 5: Guardians. It is possible this disrepancy comes from the inclusion or lack thereof of the outer walls keeping the atmosphere in.
Installation 04 B , C. They, and all additional sentient life in three radii of the galactic center, died, as planned. That is the effective range of this installation. Prototype Halo installation. Maginot Line. For a complete list, check out our Forerunner directory. Categories : Halo Array Forerunner weapons. Meta category: Featured articles. Contribute Halopedia's pages can be edited. Is this page incomplete?
Is there anything wrong? Change it! Edit this page Discuss this page Page history. Recent contributors to this article The following users recently contributed to this page:. The Array at Installation 00 , just before their departure to firing sites across the galaxy. Humans, Covenant, whatever—we're all equally edible! The only way to stop the Flood is to starve them to death.
Chief and the Arbiter fight their way to the central Citadel and kill the Prophet of Truth with the Gravemind 's help, but not before Truth kills Miranda Keyes. The Gravemind then turns on Chief and the Arbiter, siccing an army of Flood on them. The Ark is hard at work building a new Installation 04 to replace the one Chief broke in the original Halo.
To stop the Flood, Chief and the Arbiter attempt to activate the half-built Halo. But first, Chief needs Cortana. He battles through a crashed, overrun High Charity to get his AI back in one of the worst Halo levels of all time. Master Chief goes into cryosleep until his next adventure. Cortana wakes Master Chief up four years after Halo 3.
A subset of Covenant have found the Forward Unto Dawn, and they stage an attack. Just as the fight between John and the Covenant starts to get good, the world underneath the ships, Requiem , opens up and pulls the Covenant fleet and Chief inside.
Cortana and Chief attempt to find a way off the planet to return Cortana to Dr. Halsey so she can cure the rampancy.
But instead, Chief and Cortana accidentally unleash the Didact, the commander of the Forerunner army. To make matters worse, the Covenant ally with the Didact and his army of Promethean soldiers, believing the Forerunner to be a god. A vision from the Librarian informs Chief that the Didact wants to acquire a device called the Composer and use it to finally control humans.
The heroes attempt to defeat the Didact, which involves Chief violating direct orders to abandon Requiem and the fight. The Didact eventually finds the Composer, but the Librarian helps save Chief from its destructive power. This is where things get weird. Cortana uses some special tech to stun the Didact, giving Chief a chance to counterattack.
The Didact falls into a pit and Chief manually detonates the nuke. But Cortana sacrifices herself to protect John, who eventually is captured by the crew of the Infinity. Despite sacrificing herself, Cortana survived the ordeal with the Didact thanks to some very technical tech stuff. Locke chases Chief across the galaxy and the two eventually fight, with Chief winning and escaping. Locke joins up with the Arbiter to defeat the Covenant and locate John.
Blue Team and Master Chief eventually find Cortana in the Gateway a kind of portal to the Domain tantamount to a giant Forerunner library filled with secrets. Cortana seals them away in stasis, but Fireteam Osiris stops Cortana.
Finally, Halo Wars 2 introduces the Banished , a group of Covenant that formed a splinter cell against the religious organization during the war against the humans. The Banished are the primary villains in Halo Infinite. The Halo world is surprisingly complex, especially for how simple its protagonist is.
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