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| {{Status|Canon}} | | {{era|FOR|TF|H1|FS|ILB|H2|H3|HGN}}{{Ratings}} |
| {{Center|'''''Installation 04''' redirects here. For other uses, see [[Installation 04 (disambiguation)]]''.}} | | {{Haloring |
| {{Megastructure infobox | | |name=Installation 04 / Alpha Halo |
| |image=[[File:H2A-AlphaHaloDiscovery.jpg|300px]] | | |image=[[Image:Alpha_Halo.jpg|300px|The destruction of Installation 04.]] |
| |description=
| | |Location=[[Threshold]] System |
| |location=[[Soell|Soell system]], in orbit around [[Threshold]],<ref name="VIS">'''[[Halo: The Essential Visual Guide]]''', ''page 6''</ref> [[Orion Arm]],<ref name="warfleet">''[[Halo: Warfleet]]'', p. 12</ref> [[Milky Way]]
| | |terrain=Earth-like |
| |anchor=Threshold/[[Basis]]{{Ref/Reuse|VIS}} | | |Monitor=[[343 Guilty Spark (Monitor)|343 Guilty Spark]] |
| |type=[[Halo Array|Halo Installation]]
| | |Status=Destroyed |
| |function=*Galactic sterilization<ref name="halo array">[https://www.halowaypoint.com/en-us/universe/tech/halo-array '''Halo Waypoint''': ''Halo Array'']</ref> | | |Date of Construction=98,665 BCE |
| *[[Flood]] containment and research{{Ref/Reuse|halo array}}
| | |Date of Destruction=September,[[2552]] |
| |caretaker=[[Monitor]] [[343 Guilty Spark]] | | |Range=25,000 light years |
| |constructed=[[97,445 BCE]]{{Ref/Reuse|halo array}} | | |Firing Record=1.2 trillion simulated, one actual |
| |destroyed=[[2552#September|September 22, 2552]] | | |Diameter=10,000 kilometers (6,210 miles) |
| |diameter={{Convert|10000|km|mi|sp=us|sigfig=4}}{{Ref/Reuse|VIS}} | |
| |surface width={{Convert|318|km|mi|sp=us|sigfig=3}}{{Ref/Reuse|VIS}} | |
| |gravity=0.992 G (approx){{Ref/Reuse|VIS}}
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| |surface temperature=-23°C to 40°C (-9°F to 104°F) (controlled){{Ref/Reuse|VIS}} | |
| |atmosphere=1 ([[Wikipedia:Nitrogen|N<sub>2</sub>]], [[Oxygen|O<sub>2</sub>]]){{Ref/Reuse|VIS}}
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| }} | | }} |
| {{Quote|Whoever controls Halo controls the fate of the universe.|[[Captain (Navy)|Captain]] [[Jacob Keyes]]}}
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| '''Installation 04''', also known as '''Alpha Halo''', or simply '''Halo''',<ref>'''[[Halo: Combat Evolved]]''', campaign level, ''[[Truth and Reconciliation (level)|Truth and Reconciliation]]'' - Captain Keyes: "''They call it, Halo''"</ref> was one of [[seven]] ring-shaped superweapons that comprised the [[Forerunner]]s' [[Halo Array]]. It was located in the [[Soell system]] in the [[Orion Arm]] and was the closest Halo ring to the [[human sphere]].{{Ref/Reuse|warfleet}}
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| The [[Covenant]] reverentially described Installation 04 as either the '''First Holy Ring''' or the '''First Sacred Ring'''. After its destruction at the end of the [[Battle of Installation 04]], [[Installation 00|the Ark]] started to construct [[Installation 08|a replacement for Installation 04]]. After the replacement was destroyed, the Ark constructed [[Installation 09|yet another replacement]]. | | '''Installation 04''', famously known among fans as '''Alpha Halo''', was one of a series of gigantic ring worlds (the [[Halo]]s from which the series gets the name) left behind by the enigmatic, technologically-advanced, and apparently extinct [[Forerunner]]s. |
| | The [[Covenant]] reverentially described Installation 04 as either the '''First Holy Ring''', or the '''First Sacred Ring'''. It is the main setting of Halo: Combat Evolved, the first game in the Trilogy. After its destruction at the end of the [[Battle of Installation 04]], The Ark started to construct [[Installation 04 (II)|a replacement Installation 04]]. |
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| ==Overview== | | ==Background== |
| [[File:HCE-AlphaHalo-RingDetail.jpg|thumb|250px|left|Installation 04.]]
| | The purpose of Installation 04, along with its brethren, was to preclude and thwart the parasitic lifeforms known as the [[Flood]] from consuming all sentient life in the galaxy. In the event of a [[Flood]] outbreak, one of the seven installations could be triggered to annihilate all sentient life within 25,000 light years. Once one ring is set off all remaining rings would activate. All seven rings could be fired at once if need be. |
| The purpose of Installation 04, along with its brethren, was to preclude and thwart the parasite forms known as the [[Flood]] from consuming all sentient life in the galaxy by destroying all sentient life to prevent eventual consumption. In the event of a Flood outbreak, one of the seven installations could be triggered (in turn triggering the remaining Halos) to annihilate all sentient life within a radius of 25,000 light years. In the event of an unexpected shutdown, all remaining rings would go into a "standby state", in which they could be fired at once from the Ark if need be. | |
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| Installation 04, until its destruction by John-117, was controlled by the [[Forerunner]] artificial intelligence construct ([[Monitor]]), [[343 Guilty Spark]]. | | Installation 04, until its destruction by the [[Master Chief]], was controlled by the [[Forerunner]] artificial intelligence construct ([[Monitor]]), [[343 Guilty Spark (Monitor)|343 Guilty Spark]], who became rampant after the destruction of the ring, attempting to kill Master Chief, the Arbiter, and Avery Johnson. |
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| The climate of Installation 04 was very similar to [[Earth]]'s climate. There have been hurricanes over the oceans on the ring.<ref>'''[[Halo: The Flood]]''', ''page 14''</ref> The weather was, however, extremely unpredictable - rain and snowfall could occur at random, leading [[Cortana]] to wonder if the weather was intentionally irregular, or if it followed a pattern such as snow being deliberately made at the control room to slow the Flood.<ref>'''Halo: The Flood''', ''page 107''</ref><ref>'''Halo: Combat Evolved''', campaign level ''[[Assault on the Control Room]]''</ref> The ring boasted a diverse ecosystem, which included colonies of [[Thanolekgolo]].<ref>'''Halo: Nightfall''', ''Chapter 3''</ref> | | == Climate == |
| | | The climate of Installation 04 is very similar to [[Earth]]'s climate. There have been hurricanes over the oceans on the ring.<ref>[[Halo: The Flood]] page 14</ref> The weather is, however, extremely unpredictable - rain and snowfall can occur at random, leading [[Cortana|some]] to wonder if the weather is intentionally irregular, or it follows a pattern such as snow being deliberately made at the control room to slow the Flood.<ref>''[[Halo: The Flood]]'', page 107</ref><ref>[[Assault on the Control Room (Level)|Assault on the Control Room]]</ref> |
| Installation 04 orbited the massive gas giant [[Threshold]], and was suspended in the [[Lagrange point]] between Threshold and its largest [[natural satellite]], [[Basis]]. The installation had a 24-degree axial tilt from Threshold's orbital plane. Due to this, any given point on the surface of the ring received sunlight from the star [[Soell]] for half of the time it was on the sunny side of Threshold, and none when was on the dark side. This created a somewhat unusual day-night cycle for the ring, in which it was dark three-fourths of the time and had no sunrise or sunset similar to those of a planet.<ref>'''[[Halo: Combat Evolved: Sybex Official Strategies & Secrets]]''', ''page 64''</ref>
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| With a diameter of 10,000 km and a surface width of 318 km, the ring has a surface area of 9,990,000 km<sup>2</sup>.
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| ==History== | | ==History== |
| ===Construction and early history===
| | [[Image:AlphaHaloview1.jpg|right|200px|thumb|Halo with Threshold in the background]] |
| [[File:HaloConstructionCEA.jpg|thumb|250px|Sentinels finalizing Installation 04's construction process.]] | | [[Image:Ddd03.jpg|thumb|right|Part of the wreckage of Installation 04|200px]] |
| The [[Forerunner]]s had Installation 04 constructed by the [[Foundry (location)|Foundry]] of [[Installation 00]]<ref name="p371">'''[[Halo: Primordium]]''', ''page 371''</ref> approximately around the same time as the rest of the [[Halo Array]], circa [[97,445 BCE]] during the [[Forerunner-Flood war]].{{Ref/Reuse|halo array}}<ref>[https://www.halowaypoint.com/en-us/news/canon-fodder-array-with-words '''Halo Waypoint''': ''Canon Fodder - Array With Words'']</ref> The array was designed by the Forerunner [[Builder]]s to combat the parasitic [[Flood]] by eradicating them and all [[Sentience|sentient]] life in the [[Milky Way]]. After the rings were built, Installation 04 and its fellow Halos were distributed from Installation 00 to positions across the galaxy through [[slipstream space]] [[Slipspace portal|portals]].{{Ref/Reuse|halo array}}<ref>'''[[Halo Legends]]''', ''[[Origins]]''</ref>
| | ===Ancient History=== |
| | | Installation 04 was built by the [[Forerunners]] over 100,000 years before the game Halo:CE (It was 101,217 years old in [[2552]] CE, but this is measured in "local time"). |
| When the [[IsoDidact]] activated the Array at the [[Forerunner-Flood war]]'s conclusion, ending the centuries-long conflict, Installation 04 was the first to fire,<ref>'''Halo: Silentium''', ''String 38''</ref> followed shortly after by the other six Halo rings. Installation 04 lay dormant for a hundred thousand years, with [[343 Guilty Spark]] and his [[Sentinel]]s ready to keep the [[Flood]] confined in the [[Flood containment facility|Flood containment facilities]] and keeping the infrastructure of the Halo in perfect working order.
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| ===Intermediate period===
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| After eons of uneventful existence on Installation 04, 343 Guilty Spark eventually found himself bored. For his own amusement, Spark began an experiment in which he evacuated entire sections of the Installation into space; according to Spark, these were experiments to measure the geologic effects of exposure to the vacuum of space and the eventual biological recovery of the evacuated sections, in order to gain insight into emergency response scenarios.<ref>'''Halo: Combat Evolved Anniversary''' - ''[[Terminal (Halo: Combat Evolved Anniversary)#Terminal 4|Terminal 4]]''</ref>
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| Around [[40,000 BCE]], an [[unidentified alien vessel]] crash landed in [[Sector 1215]]. Sometime prior to the crash the ship started broadcasting a distress signal.<ref name="terminal5">'''Halo: Combat Evolved Anniversary''' - ''[[Terminal (Halo: Combat Evolved Anniversary)#Terminal 5|Terminal 5]]''</ref><ref name="time">'''Halo: Combat Evolved Anniversary''' - ''[[Terminal (Halo: Combat Evolved Anniversary)#Terminal 6|Terminal 6]]'' (343 Guilty Spark: ''"I have now endured 60,000 years without word from outside the Array."'')</ref> After attempting to translate it, [[343 Guilty Spark]] blocked the signal, as no communication revealing the location of any of the Halos was allowed.{{Ref/Reuse|terminal5}} After no lifeforms exited for several days, Spark had a large sarcophagus constructed around the vessel.{{Ref/Reuse|time}}
| | The Installation was activated sometime thereafter and all [[Forerunner]] and most of the [[Flood]] were killed. Installation 04 lay dormant for a millenia, with 343 Guilty Spark and his [[Sentinels]] ready to keep the [[Flood]] confined in the [[Flood Containment Facilities]] and keeping the infrastructure of the [[Halo]] in perfect working order. |
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| Between the activation of the Array and the arrival of the UNSC and the Covenant, a number of space-faring species stumbled across the installation. Although they reportedly explored the facility and recorded their findings, all of these species eventually left without breaking containment.<ref>'''[[Conversations from the Universe]]''', 343 Guilty Spark's Log</ref>
| | ===Destruction=== |
| | {{quote|Halo... It's finished..."<br />"No, I think we're just getting started.| [[Cortana]] talking to the [[Master Chief]] after the destruction of Installation 04.}} |
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| ===Discovery and destruction===
| | The [[Covenant]] discovered the location of Installation 04, after the [[Covenant]] [[Fleet of Particular Justice]] followed the single [[UNSC]] cruiser, the {{UNSCShip|Pillar of Autumn}}, which was fleeing from the [[Battle of Reach]] through slipspace. It is assumed that the [[Covenant]] knew about the Ring as the [[Prophets]] all have a holographic representation of them on their headdresses and [[Cortana]] saying previously that she used the coordinates received by the beam in [[The Fall of Reach]]. Due to the Covenant's faster [[Slipspace]] capabilities they arrived before the ''[[UNSC Pillar of Autumn|Pillar of Autumn]]''. |
| {{Main|Battle of Installation 04}} | |
| {{quote|Halo... It's finished."<br/>"No, I think we're just getting started.|Cortana and John-117 after the destruction of Installation 04.}}
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| [[File:Autumn Arrival.png|thumb|250px|The {{UNSCShip|Pillar of Autumn}} arrives at Installation 04.]] | | The ''[[UNSC Pillar of Autumn|Pillar of Autumn]]'' arrived around September 19, 2552 and was promptly shot down by the warding [[Covenant]] space forces. At around the same time, the Covenant ground forces on Installation 04 accidentally unleashed the [[Flood]] from captivity. The ensuing four-day battle that took place all over the ring was called the [[Battle of Installation 04]]. [[Humans]], [[Flood]], and [[Covenant]] fought massive battles against one another as the [[Forerunner]] [[Construct]]s tried to control the outbreak by activating the [[Halo]]. In the end a single human, [[SPARTAN-117]], detonated the ''Autumn''<nowiki>'</nowiki>s fusion reactors which destroyed the [[Halo]]. |
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| The Covenant discovered the location of Installation 04 after the Covenant [[Fleet of Particular Justice]] followed the {{UNSCShip|Pillar of Autumn}}, which was fleeing from the [[Fall of Reach]] through [[slipspace]]. The Halos are deeply ingrained into the Covenant's [[Covenant religion|religious dogma]], but prior to this discovery they had never actually found one. Due to the Covenant's faster slipspace capabilities, they arrived before the ''Pillar of Autumn''.
| | Only a handful of [[humans]] and [[Covenant]] survived the battle. 343 Guilty Spark floated through space until he met a group of [[Covenant]] on [[Threshold]]. Inspired by his words, they began a [[Heretic]] rebellion against the greater [[Covenant]]. Installation 04's destruction is seen as the first step in the chain of events that led to the [[Covenant Civil War]]. |
| | Installation 04 was the first Halo installation to be destroyed. |
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| The ''Pillar of Autumn'' arrived around September 19, 2552 and was promptly shot down by the warding Covenant ships. Shortly thereafter, the Covenant ground forces on Installation 04 accidentally unleashed the Flood from captivity. [[Human]]s, [[Flood]], and the Covenant fought massive battles against one another as the Forerunner constructs tried to control the outbreak by activating Halo. The ring's monitor, [[343 Guilty Spark]], tried to convince the [[John-117|Master Chief]] to activate Halo. Not knowing the truth of what it did, he attempted to light the ring but was stopped by his AI friend and companion Cortana who was in [[the Core]]. She informed the Master Chief of Halo's true purpose and stashed the [[Activation Index]] in her memory banks. The Monitor betrayed the two and tried to kill the Master Chief and retrieve Cortana, but the two escaped and started plotting against him.
| | There is now a large field of debris where Installation 04 was, though a few large chunks of the ring remain. Some smaller pieces of the Installation 04 have landed on [[Basis]] and others have burnt up in Threshold's atmosphere on entry. |
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| [[File:H2A-AlphaHaloDestruction.jpg|thumb|left|250px|The destruction of Halo.]]
| | The destruction of Installation 04 also triggered the activation of a portal leading to a Micro Dyson Sphere on Onyx. |
| In the conclusion of the battle, John-117 detonated the ''Pillar of Autumn''{{'}}s [[Fusion drive|fusion reactors]] in order to destroy the ring. The explosion critically damaged the superstructure below it; the resulting shockwave and damage to the ring's systems destabilized the ring, shattering it into pieces.<ref>'''Halo: Combat Evolved''', campaign level ''[[The Maw]]''</ref>{{Ref/Note|The particulars of Installation 04's destruction differ throughout its various depictions. In ''Halo: Combat Evolved'', ''Combat Evolved Anniversary'' and most [[terminal]] depictions, a portion of the ring next to the ''Autumn''{{'}}s explosion is sent flying to the other side where it bisects the ring, further splintering the superstructure. The most noticeable change is in the flashback portion of the level ''[[The Heretic]]'' in ''Halo 2: Anniversary'', where the fragment is no longer propelled to the other side and the ring simply shatters, with the explosions spreading in both directions of the epicenter in a chain reaction. The blue lights on the outer surface are also seen going out in this version. The [[Terminal (Halo 2: Anniversary)|''Halo 2: Anniversary'' terminals]] give two versions of the ring's destruction, the first (in Terminal 4) being identical to ''Halo: Combat Evolved Anniversary''{{'}}s [[Terminal (Halo: Combat Evolved Anniversary)|Terminal 11]], which is closer to the original ''Halo: Combat Evolved'' mechanics, although the ring's shattering is more violent. The second version, shown in Terminal 12, is closer in line with the depiction in ''Halo 2: Anniversary'' version of the flashback in ''The Heretic'' and lacks the shard being blasted to the opposite side.}}
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| Only a handful of humans and Covenant survived the battle. 343 Guilty Spark floated through space to a [[Threshold gas mine|gas mining platform]] over Threshold, where he stumbled upon a Covenant expeditionary force. Inspired by his words, they began a [[Sesa 'Refumee's heretic faction|heretical]] rebellion against the greater Covenant. Installation 04's destruction is seen as the first step in the chain of events that led to the [[Great Schism]]. The Heretics were quelled by [[Arbiter]] [[Thel 'Vadam]] who silenced their leader, but the seeds of a rebellion were planted. The Monitor was then captured by the loyal Covenant and later defected to the humans' side until he was destroyed on the replacement Alpha Halo by SPARTAN-117 with the help of Sergeant Johnson.
| | ===Replacement=== |
| | ''Main Article: [[Installation 04 (II)]]'' |
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| Installation 04 was the first Halo installation encountered by humanity, as well as first to be destroyed. Its attempted firing triggered the activation of a portal leading to [[Sarcophagus|Shield World 006]] within [[Onyx]],{{Ref/Novel|GoO|Page=175|Quote=Halsey: That timing coincides with the activation of an alien weapon world - before John thankfully destroyed it. It is no coincidence that the Sentinels appeared then. It must be part of a larger Forerunner plan.}} and also caused [[Installation 00|the Ark]] to start constructing a [[Installation 08|replacement ring]].
| | Shortly after the destruction of the [[Halo]], the [[Ark]] began to automatically construct a new [[Halo]] to replace Installation 04. This exact copy of the first [[Halo]] ring was nearing completion only a few months after the first ring was destroyed, but was subsequently also destroyed when it was fired before it was ready, by the [[Master Chief]] and [[Cortana]]. |
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| ===Debris field=== | | ==Astronomy== |
| [[File:H2A - Alpha Halo remains.jpg|thumb|250px|The burning wreckage of Installation 04, surrounded by vessels of the Covenant armada in the aftermath of the battle.]]
| | ''See full article:'' [[The Halos#Astronomy|The Halos]] |
| Installation 04's destruction left behind a large field of debris, with a few large chunks of the ring remaining.<ref>'''[[Halo 2]]''', campaign level ''[[The Heretic]]''</ref> Some smaller pieces of Installation 04 have landed on Basis, while others have burned up in Threshold's atmosphere upon entry.<ref>'''[[Halo 2]]''', multiplayer map ''[[Burial Mounds]]''</ref> [[Alpha Shard|One damaged fragment]] notably made a slipspace jump as a safety measure, and ended up in a distant system.{{Ref/Reuse|wp shard}}
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| ====The ''Mona Lisa''====
| | The "Ringworld" of Halo is much smaller than [[Wikipedia:Larry Niven|Larry Niven's]] [[Wikipedia:Ringworld|Ringworld]], by a magnitude of 3,000. While the diameter of Niven's ring world is close to the diameter of Earth's orbital of 300,000,000 km, the 10,000 km diameter of Halo is much closer to the diameter of Earth itself, which is 12,756 km. The ring world has a star similar to our sun in its center, and Halo is orbiting a planet, but does not encircle it. |
| {{Main|Skirmish on Mona Lisa}}
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| [[File:TML - broken Halo.png|thumb|250px|A segment of the broken ring.]] | |
| Following the return of the survivors from the battle, the Office of Naval Intelligence learned of the Flood lifeform. Section III sought to establish a research laboratory in order to control the Flood parasite and possibly weaponize it against the Covenant. A science team headed by Major [[John Smith]] was authorized to take command of the [[prison ship|prison vessel]] ''[[Mona Lisa]]''. After bringing a group of Covenant prisoners aboard, they jumped to the wreckage of Alpha Halo in the Soell system. Some Flood specimens had survived the ringworld's destruction and were recovered to be experimented on both human and Covenant prisoners. However, the Flood soon broke quarantine and infected the ship. ONI later dispatched a [[prowler]], the {{UNSCShip|Red Horse}}, to assess the status of the ''Mona Lisa'' under the pretenses of investigating Halo's debris field. On October 25, 2552, the prowler was forced to destroy the overrun vessel with a [[Shiva-class nuclear missile]].<ref>'''Halo: Evolution - Essential Tales of the Halo Universe''', ''The Mona Lisa''</ref>
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| ===First replacement===
| | Circumstantial evidence from [[Bungie]] indicates that Alpha Halo may be located in the [[Soell|Iota Horologii]] System, only 50 Light years from Earth.{{verify source}} |
| {{Main|Installation 08}}
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| Shortly after the destruction of the Halo, [[Installation 00]] began to automatically construct a new Halo to replace Installation 04. This exact copy of the first Halo ring was nearing completion only a few months after the first ring was destroyed, but was also subsequently [[Raid on Installation 08|destroyed]] when it was fired before it was ready by John-117 and Cortana. 343 Guilty Spark attempted to prevent this, but was finally destroyed by the Master Chief with the help of Sergeant Johnson in the new ring's [[Control Room]].<ref>'''[[Halo 3]]''', campaign level, ''[[Halo (Halo 3 level)|Halo]]''</ref>
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| ===Post-war=== | | ==Speculation== |
| The UNSC's [[Treaty of 2552|peace treaty]] with the [[Swords of Sanghelios]] forbids either party from landing on the remains of Installation 04.{{Ref/Reuse|nf1}} There is a 500-[[Wikipedia:Light-second|light-second]] exclusion zone surrounding the former site of the ring. In [[2556]], [[Spartan-IV]] [[Fireteam Apollo]] was [[Operation: SHELL GAME|deployed to the exclusion zone]] in direct violation of the treaty; there they recovered some items of value, including a "black box" from the Covenant cruiser ''[[Undiminished Entelechy]]''.<ref name="lc">'''[[Halo Legendary Crate]]''', ''[[Halo Legendary Crate/Data Drops|Data Drop 3]]''</ref>
| | [[Image:HaloPlanets.jpg|500px|left|thumb|A size comparison between [[Alpha Halo]], [[Threshold]], and planets in the Solar System]] |
| | It is unclear why the gas giant [[Threshold]] was specifically chosen to be the planet which Installation 04 orbited, but it is supposed that the large number of [[Forerunner]] machines already operational in Threshold (explicitly the network of Gas Mines), may have played a role in their decision. It could also be because it was the only planet in the system that had enough gravity to hold [[Halo]] in place. |
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| At some point after the war, a Spartan-IV reconnaissance team was deployed to [[Basis]]. Wearing [[VECTOR-class Mjolnir]] armor, a variant designed for artifact retrieval, their mission was to assess the debris of Alpha Halo scattered on the moon's surface.<ref>'''Halo 5: Guardians''', ''[[VECTOR-class Mjolnir]] armor description''</ref>
| | Another common theory is that it was placed there mathematically in order to cover the whole of the galaxy with the spread of the [[Halo]]s main weapon. It is probable that the Forerunner had chosen Threshold as the staging point for constructing Installation 04 in a fail-safe to attempt to isolate any major [[Flood]] outbreak. It may have been as simple as its proximity to the Gas Mine stations on Threshold, which the Forerunner may have used for power. |
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| ====Lost fragment==== | | === Survivors of Installation 04 === |
| {{Main|Alpha Shard}}
| | After the destruction of Installation 04, [[Spartan 117]] and [[Cortana]], who were responsible for the ring's destruction, fled the installation in a [[Longsword]]. Shortly afterward, they reunited with five other survivors on a [[Pelican]]. The survivors of the [[Battle of Installation 04]] were as follows: |
| When the ''Pillar of Autumn''{{'}}s reactors went critical, Installation 04 attempted to activate a safety measure and make a slipspace jump. However, this self-preservation protocol was only partly successful, and only a small portion of the ring managed to enter slipspace before the ''Autumn''{{'}}s reactors overloaded and destroyed the ring. The surviving fragment of the Halo reentered normal space in the vicinity of [[Thotael system|a red giant star]] some distance away from the [[Orrichon system]] and was caught in the giant star's orbit.<ref name="wp shard">[https://www.halowaypoint.com/en-us/universe/locations/halo-ring-fragment '''Halo Waypoint - Universe''': ''Alpha Shard'']</ref> This fragment was home to a unique element apparently created by the heat of the ring's explosion and not found elsewhere in the universe. The element was later refined and used in a [[bioweapon]] unleashed in a [[terrorist]] attack on [[Sedra City]].<ref name="nf1">'''Halo: Nightfall''' - ''Chapter One''</ref> [[Mission to Alpha Shard|A joint classified mission]] was launched to Alpha Shard by an [[Locke's team|ONI team]] and members of the [[Sedran Colonial Guard]]. Though most of the team was killed during the mission, [[Colonel]] [[Randall Aiken]] sacrificed himself to destroy the deposits with a [[HAVOK tactical nuclear weapon]].<ref>'''Halo: Nightfall''' - ''Chapter Five''</ref>
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| ===Second replacement=== | | ==== On a [[Longsword]] ==== |
| {{Main|Installation 09}}
| | * [[Master Chief Petty Officer]] [[John 117]] |
| During the {{UNSCShip|Spirit of Fire}}'s [[Second Ark Conflict|battle]] with the [[Banished]] at the Ark in [[2559#March|March 2559]], Captain [[James Cutter]], Professor [[Ellen Anders]], and logistics AI [[Isabel]] formed a plan to deploy the second replacement for Alpha Halo, Installation 09, to the Soell system in an attempt to send a [[distress beacon|distress signal]] to [[Human colonies|human space]].{{Ref/Level|HW2|[[Hold the Line]]}} On the way to the original site of Installation 04 however, a Forerunner [[Guardian|Guardian construct]] controlled by Cortana's [[Created]] intercepted the ring.{{Ref/Level|HW2|[[Last Stand (Halo Wars 2 level)|Last Stand]]}}
| | * [[UNSC]] [[AI]] [[Cortana]] |
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| ==Non-canon and dubious canon appearances== | | ==== On a [[Pelican]] ==== |
| ===Silver Timeline=== | | * [[Sergeant Major]] [[Avery J. Johnson]] |
| {{Status|Silver}}
| | * [[Corporal Locklear]] |
| [[Makee]] discovered the location of the Halo ring from her and [[John-117/Silver|John-117]]'s visions, which proves to be Installation 04 in the center of the [[Soell system]]. By tracking Makee's ship, the UNSC was able to locate the ring as well.{{Ref/Film|Id=Thermopylae|TV|Episode=[[Thermopylae (TV Series)|Thermopylae]]}} | | * [[Lieutenant]] [[Elias Haverson]] |
| | * [[Warrant Officer]] [[Sheila Polaski]] |
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| When John arrived in ''[[Condor 325]]'', he found the Covenant [[First Fleet of Solemn Accord]] chasing Makee and [[Arbiter]] [[Var 'Gatanai]] towards the Halo ring while the [[SPARTAN-III program/Silver|SPARTAN-IIIs]] prepare to launch a possible suicide mission that would destroy both the UNSC and Covenant fleets as well as the star system and the Halo ring.{{Ref/Reuse|Thermopylae}}
| | ===Other=== |
| | *[[343 Guilty Spark (Monitor)|343 Guilty Spark]] |
| | ==== Unknown ==== |
| | The following two [[UNSC Marine Corps|Marines]] have been seen after having a part in the Battle of Installation 04, but it is unknown how they made it off [[Halo]] before the explosion. Note that there may have been other survivors. |
| | *[[Sergeant]] [[Pete Stacker]] |
| | *[[Private]] [[Chips Dubbo]] |
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| ==Trivia==
| | It should also be noted that [[Spartan-II]] [[Linda-058]] survived the destruction of [[Halo]], even though she was in cryosleep the entire time. |
| [[File:Inst04detail.png|thumb|250px|Detail of the outer surface of the ring in ''Anniversary''.]] | |
| ===Redesigns===
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| While the design of the Halos has stayed largely consistent across all post-''[[Halo: Combat Evolved]]'' media, Installation 04 underwent a significant visual overhaul in ''[[Halo: Combat Evolved Anniversary]]''. The entire superstructure of the ring has been redesigned. To wit, the surface features are completely different and much more pronounced, including additions such as rows of prominent prongs lining the ring's edges and large-scale patterns of bluish light. This redesign has not been carried over to post-''Anniversary'' media: the prongs are absent from [[Installation 03]] in ''[[Halo 4]]'', and [[:File:FUD-HaloRing.jpg|a visual allusion]] to the Halos in ''[[Halo 4: Forward Unto Dawn]]'' follows the original design. However, the "prong" design does make a subtle appearance on the outer shells of the arcade machines for ''[[Halo: Fireteam Raven]]''.
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| Installation 04 also underwent a number of visual changes in ''[[Halo 2: Anniversary]]'', including the addition of blue lighting in the circular patterns on the ring's outer surface. Curiously, [[Installation 05]] in the same game uses a distinct model, which bears different surface patterning more closely modeled after that in [[Bungie]]'s games but is noticeably wider than either the Installation 04 model in ''Halo 2 Anniversary'' or the Halos in prior media. Furthermore, [[Blur Studio]] used Installation 05's model, rather than that of the original Installation 04, from ''Halo 2 Anniversary'' for [[Installation 09]] in ''[[Halo Wars 2]]''.<ref>'''Halo 2 Anniversary''', [[:File:H2A - DeltaHalo.jpg|''Delta Halo model'']]</ref><ref>'''Halo Wars 2''', [[:File:HW2 I04C.png|''Installation 09 model'']]</ref>
| | === The Survivors of the [[Human-Covenant War]] === |
| | However, not all these Marines survived the remaining war. Corporal Locklear was killed by a [[Slipspace]] crystal. It is theorized that this may have been suicide over his grief at the loss of Shelia Polaski, killed by plasma in a [[Slipspace]] bubble along with two Spartans. [[Lieutenant Haverson]] along with [[Admiral Whitcomb]] took a wounded [[Covenant]] flagship, ''Ascendant Justice'', and waged a one-ship attack on the [[Covenant Fleet]] gathered around ''[[Unyielding Hierophant]]'' in order to distract them long enough to be caught in the explosion of the station, and when the ''Unyielding Hierophant'' was destroyed it destroyed about 500 other ships. [[Sergeant Johnson]] was killed during the [[Battle of Installation 00|Battle of the Ark]], and [[Master Chief]] and [[Cortana]] were MIA after that same battle. |
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| ===Miscellaneous===
| | [[Pete Stacker]] and Chips Dubbo participated in the 21 Gun salute at the end of the war. |
| *Sergeant Johnson humorously describes Installation 04 as "God's own anti-son-of-a-bitch-machine" and a "giant hula-hoop".
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| **The former is surprisingly accurate as to the ring's actual function, since the Forerunners were worshiped as gods by the Covenant, the Flood could quite accurately be referred to as a "son of a bitch", and the ring's purpose is to fight the Flood.
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| *Except for [[Boarding Action]] and [[Chiron TL-34]], all ''Halo: Combat Evolved'' multiplayer maps are set on Installation 04.
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| *It is possible to see falling debris from Installation 04 on the Halo 2 multiplayer map [[Burial Mounds]].
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| ==Gallery==
| | {{clear}} |
| ===Concept art===
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| <gallery>
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| File:MarcusLehto_PreCE_Halo_sketch.jpg|An early sketch for Installation 04's layout and mechanics by [[Marcus Lehto]].
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| File:H2_RingDestruction_Concept.jpg|''Halo 2'' concept art of the destroyed Installation 04.
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| File:HCEA_Installation04Menu_Concept_1.jpg|Concept art of Installation 04 in ''[[Halo: Combat Evolved Anniversary]]''.
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| </gallery>
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| ===Regular gallery=== | | == Trivia == |
| | *You can see the destroyed Alpha Halo in one of the cutscenes of Halo 2. |
| | *Halo would require a massive amount of gravity to hold it into place; this is why it is orbiting Threshold. |
| | *Alpha Halo is where humanity first comes into contact with the [[Flood]]. |
| | *Installation 04, along with its successor, are the two most featured [[Halo]]s in the trilogy. |
| | *Alpha Halo's architecture is similar to that of the Ark, if not nigh-identical. |
| | *Alpha Halo is the only known destroyed [[Forerunner]] installation. (However the [[Ark]] may not be completely destroyed) |
| | *Alpha Halo is the first installation to contain The Flood until the Covenant released it by mistake. |
| | *Johnson describes it as "God's own anti-son-of-a-bitch-machine" and a "giant hula-hoop". |
| | *This is the only halo installation shown in all three games |
| | *The numbering of the rings concerning the IWHBYD ring sequence is the opposite to the the rings' actual installation numbers and should not be confused. |
| | ==Images== |
| <gallery> | | <gallery> |
| File:Installation04S.png|The symbol representing Installation 04.
| | Image:1211311449 Installation 04.jpg|The symbol representing Installation 04. |
| File:HCE Ringworld Concept.jpg|Concept art of Installation 04.
| | Image:5c68d2ee5948405b19de4d1bfce9969b214c9aec.jpg|One of Alpha Halo's three phase pulse generators. |
| File:HCE-AlphaHalo-OrbitingThreshold.jpg|Installation 04 orbiting Threshold, as seen in ''[[Halo: Combat Evolved]]''.
| | Image:Broken Ring.jpg|A piece of the broken ring. |
| File:HCE-AlphaHalo-SurfaceDetail.jpg|A close-up view of Installation 04's exterior surface.
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| File:OneRing.jpg|Installation 04's surface.
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| File:HCE-HaloRingLoadingScreen.jpg|Installation 04 as the loading screen for the PC and Mac version of ''Halo: Combat Evolved''.
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| File:HCE - Halo.jpg|The surface of Halo.
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| File:HCE Halo Sky.png|The sky of Halo.
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| File:HCE Halo Island.jpg|An island in Halo.
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| File:AlphaHaloview2.jpg|''Pillar of Autumn''{{'}}s engines detonate, destroying Installation 04.
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| File:HCE-AlphaHalo-Destruction-screen.jpg|Installation 04 breaking apart.
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| File:Broken Ring.jpg|A section of the broken ring.
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| File:FoR - Halo.png|The ring in ''[[Halo: Fall of Reach]]''.
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| File:HCE Halo Surface.png|The surface as depicted in ''Halo: Combat Evolved''.
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| File:HCEA Halo Surface.jpg|The surface as depicted in ''Halo: Combat Evolved Anniversary''.
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| File:HCE Halo Exterior Surface.png|The exterior surface as depicted in ''Halo: Combat Evolved''.
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| File:Halo ring.jpg|Installation 04, as depicted in ''Halo: Combat Evolved Anniversary''.
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| File:GuiltySparkAnniversary.png|[[343 Guilty Spark]], [[Monitor]] of Installation 04.
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| File:AssaultonControlRoom.png|The Forerunner "temple" housing Halo's control room.
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| File:PhasePulseAnniversary.png|One of Installation 04's three [[phase pulse generator]]s.
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| File:Inst04 vista.jpg|A rocky shoreline on Installation 04.
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| File:Installation 04 Terminal.jpg|Installation 04, as seen in a [[Terminal (Halo: Combat Evolved Anniversary)|Terminal]].
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| File:HCEA-Terminal-AtmoEjection.jpg|343 Guilty Spark exposing a section of Installation 04 to hard vacuum.
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| File:Installation04destroyed.png|The destruction of Installation 04.
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| File:HaloDestructionCEA.png|Installation 04 being destroyed in ''Halo: Combat Evolved Anniversary''.
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| File:H5G-Alpha Halo.png|Installation 04's surface as seen in the ''[[Halo 5: Guardians]]'' [[Forge]] map [[Parallax]].
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| File:LC 003 Cov1.png|Covenant readout of Installation 04.
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| File:LC 003 Cov2.png|Another Covenant readout.
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| </gallery> | | </gallery> |
| {{Linkbox|gallery=yes}}
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| {{Clear}}
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|
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| ==List of appearances==
| |
| *''[[Halo: The Fall of Reach]]'' {{1st}}
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| *''[[Halo: Combat Evolved]]''
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| *''[[Halo: The Flood]]''
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| *''[[Halo: First Strike]]''
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| *''[[Halo 2]]'' {{C|Flashback}}
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| **''[[Conversations from the Universe]]''
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| *''[[Halo Graphic Novel]]''
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| **''[[The Last Voyage of the Infinite Succor]]''
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| **''[[Breaking Quarantine]]''
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| *''[[Halo: Ghosts of Onyx]]'' {{Mo}}
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| *''[[Halo 3]]'' {{Mo}}
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| *''[[Halo Legends]]''
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| **''[[Origins]]''
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| *''[[Halo: Evolutions - Essential Tales of the Halo Universe]]''
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| **''[[The Mona Lisa]]''
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| *''[[Halo: Reach]]
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| *''[[Halo: Fall of Reach]]''
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| **''[[Halo: Fall of Reach - Invasion|Invasion]]''
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| *''[[Halo: Combat Evolved Anniversary]]''
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| **''[[Terminal (Halo: Combat Evolved Anniversary)|Terminals]]''
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| *''[[Halo 4]]'' {{Mo}}
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| *''[[Halo: Silentium]]''
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| *''[[Halo: Escalation]]''
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| *''[[Halo: Broken Circle]]'' {{Mo}}
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| *''[[Halo: Nightfall]]''
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| *''[[Halo 2: Anniversary]]'' {{C|Flashback}}
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| **''[[Terminal (Halo 2: Anniversary)|Terminals]]''
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| *''[[Halo: Hunters in the Dark]]'' {{Mo}}
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| *''[[Halo 5: Guardians]]''
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| *''[[Halo Mythos]]''
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| *''[[Halo: Tales from Slipspace]]''
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| **''[[Dominion Splinter]]'' {{C|Flashback}}
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| *''[[Halo Wars 2]]'' {{Mo}}
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| *''[[Halo: Envoy]]'' {{Mo}}
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| *''[[Halo: Fireteam Raven]]''
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| *''[[Halo: Official Spartan Field Manual]]''
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| *''[[Halo: Renegades]]'' {{Mo}}
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| *''[[Halo: Shadows of Reach]]'' {{Mo}}
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| *''[[Halo: Point of Light]]'' {{Mo}}
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| *''[[Halo: Divine Wind]]'' {{Mo}}
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| *''[[Halo Infinite]]'' {{Mo}}
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| *''[[Halo Infinite: Memory Agent]]'' {{Mo}}
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| *''[[Halo: Outcasts]]'' {{Mo}}
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| *''[[Halo: Battle for the Blood-Moon]]'' {{Mo}}
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| *''[[Halo: The Television Series Season Two]]''
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| **''[[Thermopylae (TV Series)|Thermopylae]]''
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| **''[[Halo (TV Series)|Halo]]''
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|
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| ==Notes==
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| {{Ref/Notes}}
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| ==Sources== | | ==Sources== |
| {{Ref/Sources}}
| | <references/> |
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| {{Forerunner|array|category=no}} | | {{Forerunner2}} |
| | {{Halos}} |
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| [[Category:Installation 04 locations| ]] | | [[Category:The Forerunner]] |
| [[Category:Halo Array]] | | [[Category:Halos]] |
| | [[Category:Technology]] |
| | [[Category:Installation 04]] |
