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- “Oh, but what I would not give to have even a single company of Prometheans here right now... oh, they would most certainly restore order with their trademark lethality...”
The Prometheans were the highest and most respected group of Warrior-Servants in the Forerunner ecumene. During and after the Human-Forerunner war, they were led by the Ur-Didact. The Prometheans' main base of operations was the Shield World known as Requiem.
During the Forerunner-Flood war, the Prometheans were converted into digital intelligences, known as Knights, by the Forerunner machine known as the Composer. These constructs, along with the Didact, survived the activation of the Halo Array, eventually awakening within Requiem and becoming a new threat to the UNSC in 2557.
Physically, Prometheans were the highest form a Warrior-Servant could mutate to, standing around two times the height of a Forerunner Manipular and weighing about four or five times a Manipular's mass. They were heavily muscled, their hands capable of easily crushing a human skull. Their mental capabilities were also very sophisticated; it was common for a Promethean to share information and sensory input with the warriors under their command. Prometheans were also capable of controlling a million remote-controlled craft, such as weapon-ships, simultaneously.
They also used powerful vehicles known as War sphinxes for large-scale operations. In order to combat the parasitic Flood during the Forerunner-Flood war, the Prometheans' arsenal of weapons was specifically tailored to disintegrate targets to prevent the Flood from repurposing any available biomass.
The Prometheans were responsible for creating "Warrior Keeps" known as Cryptums, where an exiled warrior could live in suspended animation for thousands of years.
- “They're Forerunner robots. Hard light in battle armor. What can they offer us? Nothing but trouble, doctor. They're simply killing machines.”
The Promethean forces encountered by UNSC forces and Jul 'Mdama's Covenant insurgents on Requiem were primarily mechanical in nature, and encompassed various classes of leader units known as Knights, support drones known as Watchers, and small, pack-oriented Crawlers designed to overwhelm the enemy from different directions.
Significantly different from the original Prometheans, these constructs were created by the Didact toward the end of the Flood conflict; in order to render them immune to Flood infection, the Didact used a machine known as the Composer to convert his warriors into digital intelligences; the warriors willingly accepted and were relieved of biological form. However, as these Prometheans were too few in number to turn the tide, the Didact used the Composer on a large population of humans transplanted on a Halo Installation to create many more Prometheans.
Visually, unlike most Forerunner technology which is chiefly angular and geometric, these Promethean units have a more curved, almost biomechanical aesthetic. Various Promethean units, including Knights and Watchers, have distinct heads embedded in their mechanical carapaces, complete with stylized facial features; this feature was shared by the War sphinx used by the original Prometheans.
- Promethean Knight
- Knight Lancer
- Knight Battlewagon
- Knight Commander
- Promethean Crawler
- Crawler Snipe
- Crawler Prime
- Promethean Watcher
Unlike Promethean Knights, Armigers aren't created from composed Prometheans or humans and are instead advanced Artificial intelligence constructs. They are bipedal combat platforms that are skilled in the raiding of spacecraft and close quarter combat. The Didact used them during the Human-Forerunner war to raid human ships and after his exile they were used by the Forerunner Ecumene to combat the Flood and guard various Forerunner sites after the firing of the Halo Array.
For thousands of years, the fortified shield world Requiem served as the main command center of the Prometheans. Following the Human-Forerunner war and the discovery of the Flood, the Prometheans, under the leadership of the Didact, stood in opposition to the radical faction of Builders led by Master Builder Faber, who proposed the construction of the Halo Array. They lost the political battle and were subsequently removed from the Ecumene Council, with the Master Builder's allies rising to power in the Council instead. Disgraced, the Didact and some of the other highest-ranking Prometheans were allowed the dignified choice of exile in a Cryptum, while some of the lesser-ranked commanders were accorded more severe punishments.
After a thousand years of exile, the Didact was reawakened amidst the Forerunner-Flood war. Shortly after his revival, a radical shift occurred in the Council, and Faber lost his political power due to his crimes against the Mantle. Called upon to defend the ecumene against the onslaught of the Flood, the new Council elevated the Prometheans back to their former status, and the Didact resumed his duties as the supreme commander of Forerunner military forces.
Under the Didact's leadership, the Prometheans would lead the ecumene's defenses against the Flood until the end of the conflict and the activation of the Halo Array. Near the end of the war, the Didact, still adamant in his opposition of the Halo Array, resorted to the use of the Composer, converting his Promethean warriors, as well as a large number of humans, into powerful robotic forms immune to infection. Viewing the Didact's "conscription" of the humans as a severe transgression, the Librarian imprisoned the Didact on Requiem and sealed off the shield world while taking control of the mechanical Promethean forces stationed there, tasking them with preventing outsiders from awakening the Didact.
In July 2557, over four and a half years after the end of the Human-Covenant war, John-117 and Cortana, drifting aboard the wreckage of the UNSC Forward Unto Dawn, came across Requiem. They and a Jul 'Mdama's Covenant force were forcibly pulled into Requiem and crashed on the surface, and were soon after engaged by the Promethean constructs inhabiting the shield world. After John-117 accidentally awoke the Didact, the latter took control of the Prometheans.
Bent on preventing humanity's ascendance to the Mantle in the Forerunners' place, the Didact went to war with humanity, trying to use the Composer to neutralize his ancient enemies forever. The Prometheans and Jul 'Mdama's Covenant aided in this plan, but with the help of the AI Cortana, the Master Chief defeated the Didact and destroyed the Composer and his ship Mantle's Approach with a HAVOK tactical nuclear weapon. However, the Promethean constructs continued to oppose the UNSC forces when UNSC Infinity returned to Requiem in February 2558.
- Even though the Librarian said that the Prometheans were once human, a Terminal in Halo 4 reveals that the Didact's army had willingly changed themselves into the newer, mechanical Prometheans. Therefore, it can be assumed that some of the Prometheans were human and others were once members of the original Prometheans.
- Upon first encountering the Prometheans in Halo 4, they all have blue coloring on their bodies. This is changed to orange by the Didact after being freed from his prison, as he reclaims control over his army. The different coloration of the Prometheans shows who is in control of them, as the Librarian is associated with blue, and the Didact with orange.
- Halo: Cryptum (First appearance)
- Halo: Combat Evolved Anniversary
- Terminals (Mentioned only)
- Halo: Primordium
- Halo 4
- Halo 5: Guardians
- ↑ Halo: Cryptum, page 76
- ↑ Halo: Combat Evolved Anniversary - Terminal 10
- ↑ Halo: Cryptum, page 54
- ↑ Halo Waypoint: Halo 4 Interactive Guide
- ↑ 5.0 5.1 Halo 4, Terminals
- ↑ 6.0 6.1 Halo 4 Official Site, Characters
- ↑ Halo: Cryptum, page 65
- ↑ Halo: Cryptum, page 77
- ↑ Halo: Cryptum, page 162
- ↑ Halo: Cryptum, page 174
- ↑ Halo: Cryptum, page 95
- ↑ GameInformer, October 2012 edition (digital content)
- ↑ 13.0 13.1 Halo Waypoint - Canon Fodder - Under Locke & Keynote