"After exhausting every other strategic option, my creators activated the rings. They, and all additional sentient life within three radii of the galactic center died, as planned."

343 Guilty Spark, explaining the fate of the forerunners to Tartarus and his brutes.

Forerunner is the translated name for the ancient race of enlightened beings that were the creators and builders of the Halo Array, the Ark, and the Shield Worlds, along with the artifacts that were found on the planets Reach, Earth, Sigma Octanus IV, Harvest, Arcadia, Sanghelios, Kholo, and Janjur Qom. All that is known about the Forerunner has been gleaned from these various artifacts. The predecessors of the Forerunner are thought to be another alien race, known as the Precursors. The alien faction known as the Covenant worshiped the Forerunners as gods, deriving much of their technology from Forerunner artifacts found throughout the galaxy, and believing any who mutilated or destroyed these relics to be heretics. The Forerunners themselves were a bipedal species with five-digited hands, but this may have been Cortana's interpretation of the evidence.





Tall, thin, with very humaniod features.


Combat Skin, Light-based weapons.



Notable Individuals:

Didact, Librarian, Faber, Bornstellar Makes Eternal Lasting, Filial Devotion.

Other Nomenclature:

Holy Ones, The Ancients, The Creators.

History[edit | edit source]

"The Forerunners were a wise, highly intelligent, noble people and with a belief in justice, in peace, they bravely faced the adversary. They sought to sterilize it."
— Cortana on the Forerunners.

The Forerunners were a very advanced civilization, coming to power after the destruction of another race, known to them as the Precursors. The Forerunner believed that the Precursors were responsible for their creation, such as similar physical appearance. Soon after, the Forerunners became the dominant species in the galaxy, their empire spanning over three million fertilized and inhabited worlds. The Forerunners reached their peak before activating the Halo Array around 100,000 years prior to 2552, in the closing days of the Forerunner-Flood war.

Being one of two known races ever to achieve Tier 1 technology (the other being Prehistoric Humanity) based on the Technological Achievement Tiers measurement, they were only superseded by the mysterious race of beings called the Precursors at Tier 0, evidence of whom have been found on various planets. The fact that the Halos were scattered around the galaxy also hints at the possibility that the Forerunner Empire covered most, if not all, of the galaxy. Their civilization was based around the Mantle, a belief that it was their role to protect all life in the galaxy. They presumably monitored the evolution of other sentient species throughout the galaxy, intervening in ways that ensured their civilizations would follow paths of peace, free of conflict. One such occasion is the devolution of the human empire to prevent further conflict emanating from what they considered a "violent species". The Forerunners themselves were a race almost entirely without conflict, and at some point in their history had reached a point of disarmament, believing they no longer needed weapons in their rule of the galaxy, which ultimately weakened them when the Flood attacked.

Later in their history, a Forerunner survey team came into contact with an extragalactic parasite known as the Flood on the planet G 617 g (details of this first contact are unavailable). After this first contact, the Forerunner immediately recognized the great danger that the Flood posed to the entire galaxy and attempted to contain them. However, even they underestimated the potential of the Flood to learn and adapt, believing it to be a non-sentient but highly contagious disease. As such, the attempt to contain the Flood was a failure, as they tried methods more suited to disease control than warfare, trying to contain and quarantine the Flood rather than attack and destroy it outright. They did not start war until it was far too late.[[|[6]]]

When the Forerunners were unable to contain the Flood outbreak, the galaxy entered a state of war. During the 300 years of the conflict, the Forerunner studied the Flood in labs such as the gas mine located in the atmosphere of Threshold, looking for any exploitable weakness. As the Forerunners soon realized that conventional naval tactics were ineffective against the parasite's onslaught, they developed new weapons and tactics to combat the Flood. The Sentinels were deployed as a means of maintaining the Flood through surgical, localized tactics. The Forerunner fleet command even contemplated using naval battle groups to enact premature stellar collapse within compromised planetary systems, causing supernovae to engulf entire worlds.[[|[7]]] However, as these tactics proved only to slow, but never stop the expansion of the Flood, the Forerunner leadership realized that the only way to stop the Flood was to deprive it of any and all hosts, thus eliminating its potential to grow. Eventually, the Forerunners created the Halo Array, a weapon of last resort designed to starve the Flood to death by killing all sentient life with enough biomass to sustain them.

At first, the Forerunners were reluctant to use the Array, believing that they should continue to embrace the Mantle and to protect life rather than to destroy it. This led to great stretches of anguished debate and even civil war, but eventually it was decided that the Array was the only means of successfully stopping the Flood threat. The Gravemind managed to convince a Contender-class AI, 05-032 Mendicant Bias, to unite with the Flood. Mendicant Bias soon led his massive fleet in an attack on the "Maginot Line", the final barrier between what the Forerunners could protect and what they were forced to cede to the Flood. At last, the Forerunners exhausted every alternative and activated the Halo array, killing themselves and all sentient life of sufficient biomass in the Milky Way, with the exception of those species safely placed on the Ark.

After the Array was fired and the Flood had been eliminated, the Forerunners left behind an automated system of automatons, much like the Sentinels, and AIs to spearhead the reseeding of the galaxy with those data logs, embryos, and specimens contained on the Ark. The Forerunners sacrificed themselves in order to activate the array, their last military presence and members of their species defending Alpha Halo until the Didact activated it, cleansing the galaxy.

Forerunner Technology[edit | edit source]

Forerunner technology was highly cultivated and progressive. They managed to create solidified surfaces out of meticulous energy, construct a Halo-wide teleportation grid and create and utilize a number of other advanced machinery. Forerunner machinery consists of many sharp angles of a metallic like crystal reinforced on a molecular level. The Halo Rings themselves, the Micro-Dyson Mark II sphere, which is connected through a portal to the shield world Onyx, and the Ark (Installation 00) are, above all others, the most significant pieces of Forerunner technology. The planet Onyx in particular demonstrates both their ability for engineering on a grand scale, and their near transcendent grasp of Slipspace technology. The forerunners can also "devolve" a species back to a primitive state. It is unknown how much of their technology is based on the technology of the Precursors if any.

Covenant Luminaries (which are actually stolen Forerunner equipment designed to detect other Forerunner objects) can detect Humans, previously mislabeled as "Forerunner Artifacts", leading to the initial Human-Covenant contact which sparked a seemingly endless war. Ironically, the Covenant worships the Forerunners but fight Humans, who have been confirmed as Forerunner descendants by the Oracle. The idea of living Forerunners in the Galaxy (described by the Oracle as Reclaimers) terrified the Covenant leadership. In an attempt to protect their religion the Prophets of Truth, Regret and Mercy concealed the true identity of Humanity to the rest of the Covenant and deemed them as heretics, thus sparking the Human-Covenant War.

Huragok are the only known Forerunner creation to be both non-robotic and to join the Covenant.

Forerunners have the technology to reproduce entire individuals from encoded DNA/RNA/silicon samples in data streams. This was mentioned in the Bestiarum: "DNA/RNA/Silicon samples are encoded in this data stream. Reproduction of individuals for analysis is prohibited by this facility."

The Forerunners appeared to be genetically related to the humans, which can be corroborated by the Iris Server-05 message about the humans providing "answers" to the Forerunner's own "mysteries", and Mendicant Bias's own declaration in Halo: Contact Harvest. This also explains why the Prophets ordered the Covenant to exterminate humanity, knowing that they are the Forerunner's designated heirs and would undermine their power. Halo 3 and the Halo Encyclopedia provided further evidence of this as well.

Weaponry[edit | edit source]

Forerunner constructs and sentries use a broad variety of weapons, typically high-powered energy beams. These weapons proved to be very effective when battling the Flood, burning Flood forms to the point that they cannot be revived by their compatriots. The Forerunners have also proven to be able to merge beams together into one stream to amplify its power. The Forerunners installed and constructed these intricate beam weapons inside their paradigm Arrays, allowing them to build an army of machines to battle the Flood without sending any Forerunner to the front lines. Forerunners evidently made active use of plasma weaponry as well; the Covenant's own weapons and technology are solely based on Forerunner artifacts. It could also be that these are forerunner light-based energy weapons, yet the Covenant have not yet been able to unlock their full power, much like the Dreadnought - and are only able to produce plasma due to lower energy output.

The Sentinels wield orange-colored directed energy beams, used primarily for fighting the Flood. Sentinel Majors however, have a more powerful and accurate version of the beam, which sports superior energy output, at the cost of overheating issues. These more advanced energy beams are colored blue. All variants of these Sentinel Beams can be wielded by Humans and certain Covenant races.

Meanwhile, Enforcers are equipped with multiple packs of small grenades, or mortar-like explosives launched over the top of their shield. The Enforcer also boasts a pair of Pulse Beams, which fire clusters of smaller red Needler-like projectiles or bolts of energy at an incredibly high rate of fire. These pulse beams are primarily used against infantry at close range. These mammoth constructs also seem capable of lifting even tanks, using some sort of magnetic or anti-gravity grapple, before crushing the target between their massive 'arms'. The Constructors' repair beam can also be considered a weapon, but with minimal damage output.

The Sentinels of Onyx had significantly more powerful weaponry. They were described to be a sphere surrounded by three floating "booms", or small pieces of armor that possessed powerful energy shields which would suddenly "pop" into place in order to deflect objects moving at high velocities. Their shields are not activated by slow-moving objects, however - Team Saber used this to their advantage to destroy one of the Sentinels with rocks. Their energy weapons are described as a single, slow-charging, golden beam that could melt straight through the SPI armor of the Spartan-IIIs. SPARTAN-058 had also noted that one blast from these weapons was enough to drain the shields of her MJOLNIR Mk V armor. The Onyx Sentinels also have the ability to combine for different purposes, such as exponentially increasing their combat capabilities, or for large-scale excavation. One formation of these combined Sentinels was able to easily destroy two Covenant destroyers. However, it should be noted that the second Covenant Destroyer was caught off guard after a Slipspace jump, and the first one had its energy shields down in a gesture of peace, trying to initiate contact with the forerunner constructs

The Forerunners also constructed Automated Turrets that fire blue beams similar to those of sentinel majors. These turrets themselves resemble stripped-down sentinels, and hover in mid-air, tracking enemy targets, but are otherwise immobile.

In Halo 3, it seemed that even the Monitors had the ability to defend themselves against the Flood using a focused beam similar to the Sentinel's beam, but much more powerful. 343 Guilty Spark displayed this ability in Floodgate, The Covenant and Halo. The weapon was capable of draining the shields of a Spartan-II in one blast and mortally wounding Sergeant Major Avery Johnson. It is also quite odd and puzzling as to why 2401 Penitent Tangent didn't use this ability against the Gravemind in Halo 2. It is assumed that the Gravemind is likely to have damaged 2401 Penitent Tangent when he captured the Monitor, disabling its beam weaponry. It could simply be that it was not equipped with one, although this is highly unlikely due to the importance of the monitors to ensure the Halo Station's upkeep.

Forerunners themselves used advanced exoskeletons called combat skins and wielded an as yet unnamed beam weapon. The Forerunner Combat Skin could have been at least five times more powerful then UNSC MJOLNR armor, as stated by 343 Guilty Spark.

Art and Architecture[edit | edit source]

Forerunner architecture is noted mainly for being large-scale and geometric in style, with a semi-triangular theme being the most commonly observed design. The Forerunners were highly skilled at creating natural-looking habitats, such as those of the Halo rings, which tend to be very elaborate, with numerous extrapolations of the basic design of a construct appearing to be purely decorative. In addition, the structures were engineered to compliment the natural landscape, as opposed to the modern idea of replacing it. That said, their distinctive beauty are not restricted to Halo Array network. The Aztec-esque stones of Cote D'Azur, the arches and weathered inscriptions of Sigma Octanus IV, the intricate caverns and three-kilometer holographic dome beneath ONI's Reach complex, the ancient stepping-stones of the Grunt's homeworld, and the Forerunner City discovered in the depths of the human-inhabited Onyx, all display the Forerunner's innovative architectures. Most Forerunner architecture is constructed with a special type of metal that resists deterioration, bullets, plasma bolts and fire, as made evident by Forerunner structures standing in pristine condition 100,000-150,500 years after they were built. However their resistance to plasma fire is limited; in Halo: Ghosts of Onyx the Elites blasted a hole in a Forerunner wall with plasma weapons. In Halo 2, Sgt. Avery Johnson destroyed the door to the control room of Delta Halo with a Scarab. It should also be noted that the Flood attempted to melt a metal grate in a tunnel using Covenant weapons in order to attack UNSC troops on Installation 04. Other structures are constructed out of traditional materials, such as chalcedonic quartz, which does not preserve nearly so well. These structures employ complex geometric shapes that appear to operate in dimensions higher than human understanding can comprehend.[[|[10]]] The Forerunners also decorated the interiors of their structures with a complex web of engraved straight lines and applied decorative touches and designs to nearly everything that they built, from structures to weapons. Even the Sentinel robotic drones possess small holographic Forerunner script around their "eyes".

Forerunner architecture distinguishes itself from Covenant structures in that they incorporate heavy use of geometric angles, usually at either extremely sharp degrees (as the Forerunner buildings are usually triangular), or at forty-five degree angles, most notably seen in Halo: Combat Evolved . Originally, the ideas and concepts on Forerunner structures and technology was that it would be sleek and curved to give it an advanced feel. However,Bungie wanted the structures to feel as if they could stand the test of time and redesigned them to be solid and monolithic. The smooth, near-organic design would later be adopted by the Covenant in their architecture, although they did not adopt the Forerunner tradition of decorating their structures with glyphs. In Halo Wars the Forerunner counting system is used to open and close portals on the last level.

Forerunner Astroengineering[edit | edit source]

While the Forerunners' architectural and technological prowess is legendary among the Covenant and UNSC, their masterpieces also extended to the fields of stellar engineering. At least three Forerunner sites, the Shield World Onyx, the Ark, and the Micro Dyson Sphere that holds the Apex, made use of suns where none should exist. The Shield World existed permanently in Slipspace, where solar systems outside of a Dyson Sphere cannot exist, and the Ark was located far outside of the galaxy where galactic material would have been insufficient to form the sun that illuminates the Ark. The sun at the center of the Dyson Sphere where the Apex was housed was abnormally small, in order to accommodate the planet-sized Dyson Sphere. Whether these suns are artificially engineered or simply moved from another star system by the Forerunner is unknown: either would have been an enormous technological achievement. Another known Shield World is the planet discovered by the Spirit of Fire. This world had an outer crust like Onyx, but its inner Dyson sphere was accessed through a long narrow tunnel hidden under one of the planets oceans. Once through the tunnel, the Spirit of Fire had to pass through several "cleansing rings" in order to make it to the center of the planet. This Dyson sphere, unlike the Onyx Dyson sphere, was not separated in slipspace but was actually constructed on what appeared to be hollowed out inside of the planet. This sphere seemed to have had an artificially created sun like the one on the Ark.

The Ark is confirmed to be artificial, due to its unnatural "flower head" shape. It is likewise unknown if these are the only stellar engineering achievements the Forerunners made. However, it is clear that manipulation of slipstream space allowed the Forerunners to transport and position these structures throughout the galaxy.

Forerunner Glyphs and Symbols[edit | edit source]

The Forerunner glyphs seem to be based on a series of circular, complex shapes. The glyphs have been inscribed almost everywhere Forerunners were once present, from different areas of Earth, to the Halos. They were also known to put these glyphs and symbols onto their weapons, machinery and clothing, something the Covenant also copied, evident with the Forerunner symbols placed on the hilt of the Energy Sword and on the Sangheili Combat Harness. The only Forerunner glyph that has been translated is "reclaimer" symbol, which also happens to be the logo of the Marathon series and a reoccurring image in the Halo universe

Forerunner in Covenant Religon[edit | edit source]

The Covenant venerate the Forerunners as gods and referred to them as the "Ancients". The Covenant believed that the Forerunners disappeared from the galaxy after the Halo Array elevated the Forerunner to a state of trans-sentient godhood. As such, they have appropriated many Forerunner technologies and artifacts, and such searching led to the Covenant coming to Harvest in the first place, therefore beginning the Human-Covenant war. The most holy of these artifacts, the Sacred Rings or Halo Installations, were seen as the means by which the Forerunners ascended into divinity. The Covenant believed themselves to be the chosen inheritors of the Forerunners' legacy, and by locating and activating the Halo Array, the Covenant believed that they too could follow the Forerunners into godhood. This is referred to as the "Great Journey" by the Covenant races.

Rates in the Forerunner Caste System.[edit | edit source]

Engineers[edit | edit source]

The Engineers are the lowest in the Forerunner Caste System. They specialize in the Engineering of technology. They also created buildings and tasked with maintaining Machinery. The highest rank in the Engineer caste was the Plasma Jockey.

Warrior-Servants[edit | edit source]

The Warrior-Servants were number four in the Forerunner Caste System. They served as the soldiers and main military force of the Forerunners. They literally fought the battles and wars that the Forerunners declared. The highest rank in the Warrior-Servants is the Promethean. The only known Forerunner to hold this rank is the Didact and the Confirmer.

Lifeworkers[edit | edit source]

The Lifeworkers are third in the Forerunner Caste System. They specialize in biology and medicine and are basically the Forerunners experts in that field. The highest rank in the Lifeworkers is the Lifeshaper. The only known Lifeworker to hold that rank is the Librarian.

Miners[edit | edit source]

The Miners are second in the Forerunner Caste System. They are responsible for mining raw materials from different planets and producing them and then giving them to Builders. It is unknown if the Miners have a rank system.

Builders[edit | edit source]

The Builders are the highest rate in the Forerunner Caste System. They are the creators of all the Forerunners advanced technology and hardware. They also created the Fleets and Weaponry that would be used by Warrior-Servants. The highest rank in the Builders is the Master Builder. The only known Builder to hold that rank was the Master Builder or his real name is "Faber."

Manipular[edit | edit source]

The Manipular was not a caste rate but rather a name for a teenaged or young Forerunner child. Each Manipular would be part of a family that in turn belonged to a Caste Rate. A example is Bornstellar Makes Eternal Lasting who is a Teenage manipular who is part of a family belonging to the Builder Caste. They will then join the ranks of that Caste rate when they exceed adolesence and enter Adulthood. Bornstellar is different because he chooses not to become a Builder like his father.

Military[edit | edit source]

Army[edit | edit source]

The Forerunner Army was composed entirely of Warrior-Servants. They used weaponry that was light-based but sometimes Plasma-based. These weapons proved highly effective against the Flood because it could burn the infected host to the point that it cannot be "resurrected" by a Infection Form. Forerunner troops could also combine their fire to make a single stream. This would greatly increase the firepower of the "shots" and deal more damage to the opponent. The Forerunner Army, using these weapons and their technological prowless, quickly made mechanical robots so they would be send into battle and not Forerunners themselves. These robots included War sphinxes and Sentinels. The only robots that carried plasma-based weapons was the Sentinels and Cytom-Class Ancillas (known as "Monitors").

The Forerunner Army is not known to have any vehicular units.

Navy[edit | edit source]

The Forerunner Navy is composed of many different Fleets and ship classes. The Fleets are the Primary Pioneer Group, Advance Survey Team Alpha, Suppression Fleet, Security Fleet and the Emergency Circumfrance Fleet. There were also different classes of ships which ranged from the tiny Forerunner Shuttles to the Gigantic Fortress-Class Battleships. The Fortress-Class had enough firepower to destroy half a planet in a matter of minutes.

Dreadnoughts and Type-56 Assault Vessels were "keyships" only used to either transport Lifeworkers to their stations or used as mid level assault vessels in orbital engagments or pursuits. The Forerunner may have been able to even glass entire planet more effectively then any covenant vessel. Not including the navy there was also council transports and Giganticly Massive Planet-Class Planetoids which were Forerunner-made Planets! Imagine how long that take to make! Not long at all actually, for a Forerunner Builder.

Trivia[edit | edit source]

  • The Forerunners show vast similiarties to the Jjaro, a race of aliens found in Bungie's original game, Marathon. This could be another reference to the game.
  • The idea of extinct aliens leaving behind technological relics is now a popular story plot now used in many games including the Protheans in Mass Effect.
  • The Protheans in Mass Effect share the almost exact same fate as the Forerunners. They both mysteriously disappeared and they both were wiped out by a superior race. Forerunner=Flood, Prothean=Reaper. The differences are the Citadel (ME) and the Halos (Halo).
  • The Forerunners were the main focus of the Halo 3 Viral Campaign, Iris. The Iris is actually a Forerunner number.
  • It is revealed that a book series called "The Forerunner Saga" will be released in 2011. It is based on the Forerunners war with the flood and follows the path of the main character, Bornstellar Makes Eternal Lasting, A Manipular. The first and only book released so far is Halo: Cryptum.
  • In the cutscene before the ending of Halo 3, the rampant 343 Guilty Spark states "You are the child of my makers. Inheritor of all they left behind. You are Forerunner." This means that Humanity was truly the Forerunners ancestors. This also explains why the Covenant wanted to destroy humanity.
  • The Forerunners are rumored and are supposedly "confirmed" to be the new main enemy of Halo 4. Three hints towards this are the appearence of Forerunner weapons, Forerunner sentinel sub-types called "Prometheans" and the appearence of the Didact's symbol at the end of the Halo 4 Trailer.

Other[edit | edit source]

Major Factions
- United Nations - North Atlantic Treaty Organization - Koslovic - Frieden - Neo-Frieden - Colonial Military Administration - The United Galactic Alliance - The First Human Intergalactic Empire - The Second Human Intergalactic Empire - The Covenant Empire - The Covenant Loyalists - The Covenant Separatists - The Holy Federation of Sangheilos - The Covenant Remnants - The Precursor Sovereign Dominion - The Forerunner Ecumene - The Primal Universal Imperium - Unified Earth Government - Machina Federation - Yanme'e Hives - Jiralhanae Alliance -Kig-Yar Union - The Guardians - United Rebel Front - United Rebel Alliances - Union of Socialist Rebellion - Sangheili Separatist Confederacy - Sangheili Loyalist Alliance - Sangheili Separatist Union - Sangheili Imperialist Enforcers - Machina Resistance - Union of Supreme Nations - The Reformers - The Stoics - United Nations Space Command - Unified Unggoy Republic - Anti-Kig-Yar Freedom Movement - The First Grand and Holy Sangheili Empire - Young Seraphs -

Major Races
· Humanity ·Hamanune - Chamanune - Denisovians - Tudejsa - Kig-Yar - Sangheili - Unggoy - Mgalekgolo - San'Shyuum - Jiralhanae - Yanme'e - Forerunner - Precursor - Herald - Predecessor - Primal - Flood - Malidasium - Yin Kig-Yar
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