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Aiur SC2 Art1
Sector Koprulu sector[1]
Parent 1 – "Golden Orb of Day"
Orbital position At least third[2]
Satellites 1 – Saalok[1] ("White Circle of Night"[3])
Physical characteristics
Diameter 13,273 km[1]
Axial tilt 18.5 degrees[1]
Gravity 0.98 standard[1]
Natural features
  • 5 major continents
  • 4 oceans
  • 2,000 lakes
  • 12 mountain chains (5 volcanic)[1]

Named locations

Climate +/- 30º Centigrade (86 Fº), high humidity[1]
Length of day 24 hours[4]
Population ~5 billion+ zerg; unknown pockets of protoss survivors (2504)[1]
Surface settlements and installations
  • ~38 protoss temples (destroyed)
  • 5 major cities (destroyed)
  • 2,000 minor settlements (destroyed)
  • ~65 primary zerg hive clusters
  • ~289 secondary zerg hive clusters
  • ~600 tertiary zerg hive clusters[1]

Named locations

Inhabited world
Organization Protoss tribes
Date ?–~500
Capital world
Allegiance Protoss Empire
Date ~500–mid 2500
Infested world
Allegiance Zerg SC1 Logo Zerg Swarm
Date Late April, 2500–late June, 2500
Infested world
Allegiance Zerg SC1 Logo Daggoth's Renegade Swarm
Date Late June, 2500–September/October, 2500
Infested world
Allegiance Zerg SC2 Icon Zerg Swarm
Date September/October, 2500–? (formerly)
Infested world
Allegiance HybridHonors SC2 Decal1 Amon/Feral zerg
Protoss remnants
Date 2500–
  • Jungle
  • Ruined jungle[5]

Aiur is the protoss homeworld, located in a star system with a single yellow star and possessing a single moon not unlike Luna.[3] It is at least the third of the system's terrestrial planets, if not further out.[2]

A great psionic matrix emanates from Aiur. Protoss structures and units, to a lesser extent, draw their energy from it. A nexus provides a link to this matrix, but pylons are needed to actually tap into the energy required to provide psionic energy to new colonies.[6]


Early HistoryEdit

Aiur SC1 CineReturnAiur1

Aiur before the coming of the zerg

Aiur was engineered by the xel'naga.[6]

Aiur's moderate greenhouse-gas levels and low orbital eccentricity allowed it to develop a climate conducive to life. Over the eons, its humid rainforests teemed with a variety of species, the most advanced of which were the protoss, whose evolution was accelerated by the xel'naga. In addition to digging vast subterranean caverns,[1] the xel'naga constructed a temple to mark the site where they first set foot upon Aiur.[7]

The xel'naga eventually left Aiur due to growing antagonism among the protoss that led them to forget how to attune themselves to their primal psychic link. This led to the Aeon of Strife, during which Aiur's greater landmasses were devastated[6] and many of its lesser life-forms were pushed to the brink of extinction.[1]

Eventually, Khas unearthed khaydarin crystals left behind by the xel'naga. He channeled their primal energies through himself and rediscovered the communal psionic bond of the protoss. Khas revitalized protoss society through the Khala, which called upon the protoss to forgo their old feuds and reunite. Gradually, the protoss embraced their psychic link and were flooded with the thoughts, emotions, and experiences felt by every protoss.[6]

Golden AgeEdit

"We rose from our failings. We made Aiur a beacon of progress in the galaxy. The envy of the stars."
Aiur SC2-LotV-R Cine1

Aiur in its heyday

The following centuries saw a golden age on Aiur. Its war-torn continents were healed; its native species flourished; and five cities and thirty-eight temples were erected across its surface. The protoss population swelled to billions, and Aiur became the hub of the Protoss Empire.[1]

After the Kalath Intercession,[8] colossi were sealed away beneath Aiur.[9]

A group of rogue protoss shunned the Khala. The Conclave ordered Adun to eradicate them, but instead he attempted to convince them of the Khala's truth by teaching them how to manipulate their own latent psionic powers. Without the Khala's discipline, their powers spiraled out of control and unleashed psionic storms across Aiur. The Conclave banished the rogues from Aiur and they became known as the Dark Templar.[6]

The FallEdit

Main article: Fall of Aiur
Aiur SC2-LotV-R Cine3

The zerg lay waste to Aiur

In 2500, the zerg launched a full-scale invasion of Aiur. The protoss defenders were overrun and countless zerg carved swaths of destruction across Aiur's continents.[1] They seized the khaydarin crystals[10] and destroyed the xel'naga temple before setting the khaydarin crystal in its place,[11] allowing the Overmind to embed itself in Aiur's surface.[12]

Praetor Fenix fought against the zerg but was hampered by the ability of their cerebrates to reincarnate.[13] He was also held back by the incompetent leadership of the Conclave, the protoss governing body.[14]

When former Executor Tassadar, a veteran of previous battles of the zerg who had turned rebel, returned to Aiur with Dark Prelate Zeratul, Judicator Aldaris attempted to arrest them. Tassadar's followers destroyed the Heart of the Conclave.[15]

Overmind SC2 Art1

The death of the Overmind

With the help of the renegade terrans of Raynor's Raiders, Tassadar and his followers weakened the Overmind, sustaining heavy losses in the process.[16] Tassadar channeled Dark Templar energies through the hull of the Gantrithor and steered it on a collision course with the Overmind, destroying it.[17] However, the zerg invasion left much of Aiur in ruins.[18] The Conclave and nearly seventy percent of the population was killed. Aldaris, Fenix, Zeratul and Commander Jim Raynor banded together in order to unite and lead the scattered survivors, but the zerg continued to slaughter every protoss they encountered.[19]

The Brood WarEdit

FallOfAiur SC2-LotV-R Cine1

The zerg run rampant on Aiur

At Zeratul's suggestion, the Khalai survivors retreated to their last functional warp gate, fighting through a sizable zerg force to get there. Fenix and Raynor held back and protected their flank while the Khalai survivors escaped to Shakuras.[20] Hundreds of thousands of protoss died during the evacuation. Some protoss were stranded on Aiur,[4] and some observers remained behind to keep watch.[9]

The zerg took control of the gate,[21] but Raynor and Fenix retook it and shut it down to prevent the zerg from sending more reinforcements to Shakuras. Praetor Artanis sent though all the troops he could spare.[22]

After being contacted by Sarah Kerrigan,[23] Raynor brought Emperor Arcturus Mengsk, fleeing from the United Earth Directorate, to Aiur. The warp gate was activated and Fenix's troops held off the zerg who were incited to attack by its energies. Raynor's command center was destroyed by UED troops, but Lieutenant Samir Duran, supposedly a UED colonial officer, moved his forces out of place and the zerg intervened, allowing Mengsk and Raynor to escape through the warp gate while the UED retreated.[24]

The stranded protoss belonged to the Shel'na Kryhas and the Tal'darim. The latter, serving a mysterious Benefactor, learned strange powers.[4]

The protoss refugees on Shakuras made at least one trip to Aiur to recover wounded protoss warriors.[25] Protoss commanders noticed stranded protoss but, believing they could not be rescued, kept their existence secret.[26]

The InterbellumEdit

Aiur SC2 Cncpt1

An infested Aiur

Around 2503, the zerg occupiers had stopped fighting each other, but had stopped spawning and continued to wander the planet like "discarded tools".

The stranded protoss divided into two factions—Shel'na Kryhas and Tal'darim— and clung to life on the ruined world, fighting and avoiding conflict with the zerg. The arrival of a preserver, contained within the brain of terran archaeologist Jake Ramsey, brought great changes to both groups of protoss. The former attempted to flee through the disabled (and then repaired) warp gate, while the latter splintered as they learned the truth behind their mysterious Benefactor. The Shel'na Kryhas and renegade Tal'darim banded together to attack the Benefactor, most giving up their lives using a powerful psionic technique to hold the Benefactor off.[4]

Some of the renegade Tal'darim escaped but none of the Shel'na Kryhas made it. The remaining Tal'darim were attacked by zerg forces led by Ethan Stewart, who was seeking to use the gate and then find Ulrezaj. Ulrezaj absorbed some of his own followers to recharge his power before leaving in a xel'naga vessel, pursued by the zerg and Dominion.[26]

Aiur came under Kerrigan's control. Although some areas were left untouched by the invasion, much of Aiur became a zerg breeding ground littered with ash, broken war machines, and the remains of the dead. A small number of protoss speculated that some of Aiur's other life-forms had been assimilated by the zerg and mutated into killing machines to serve the Swarm.[1]

StarCraft Ghost Logo2

This article or section contains information about StarCraft: Ghost, which has been declared non-canon. Elements may be taken as 'flavor lore' however.
The content may be significantly out of date. Please do not add speculation to this article, and remember to cite a published source for details.

During this period, Nova was sent to infiltrate protoss facilities on the planet.[27]

Echoes of the FutureEdit

Main article: Echoes of the Future

In 2504, Zeratul returned to Aiur to learn the Overmind's secrets by making contact with the tendrils connected directly to its cortex. There he encountered the spirit of Tassadar, who revealed that the directive to destroy the protoss was forced upon the zerg and that Kerrigan was the only one who could free the zerg from slavery.[9]


LegacyOfTheVoid SC2 Logo1

This article or section contains information from StarCraft II: Legacy of the Void.

The content may change substantially over time.

Main article: Reclamation of Aiur
"The Swarm brought ruin to our world. Our proud people became refugees. And yet, they could not shatter our unity. For we are bound by the Khala. The sacred union of our every thought and emotion. Today we retake our homeworld. And with it, our legacy."

- Artanis during the reclamation of Aiur(src)

AiurZealot SC2-LotV Cine1

The Armada arrives at Aiur

In 2506, the Golden Armada launched an invasion of Aiur in an effort to retake it for the protoss.[28] By this stage, the zerg were feral, and no longer under Kerrigan's control.[29] At least one beachhead was established on the planet's surface, as the protoss came under attack by the zerg. They were able to hold off the creatures long enough for a pylon to be established, which allowed zealots to warp in and engage the zerg with more equitable numbers.[30]

As the invasion progressed, a massive protoss army landed outside Khereson and pummeled its way in, reactivating the warp conduits present.[29] However, the invasion went awry as Amon revealed his presence, corrupting the Khala and forcing Artanis to lead his remaining forces in retreat.[28]

Native SpeciesEdit

Aiur is a planet high in biodiversity and has a large variety of flora and fauna. Known species include;


Aiur SC2-LotV-R Cine2

Native Aiur avians



AiurSaalok SC2-LotV-R Cine1

A storm rages on Aiur

Aiur has furious seas[6] and stormy weather. Indeed, its summer storms have been known to appear over plateaus and disappear in the blink of an eye.[31]

Aiur's atmosphere is slightly heavier than that of most terran worlds though unprotected humans can still survive on the planet.[4]


Aiur SC-BG-BW Art1

Aiur alongside two of its sister planets





Aiur SC-R Art1





Aiur SC2 Map1

A map of Aiur

In the StarCraft II map editor, there exists a map of Aiur, showing the spread of creep across its surface. However, apart from the creep spread, this map is identical to one of Bel'Shir,[32] so assessing its validity is difficult.

The planet appears as a contestable territory in RISK: StarCraft.[33]


  1. 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 Blizzard Entertainment. 2010-07-24. Koprulu Sector Systems: Aiur. Blizzard Entertainment. Accessed 2010-07-24.
  2. 2.0 2.1 Corey Konieczka, Robert A. Kouba, Dan Clark (December 17, 2008). StarCraft: The Board Game: Brood War. Fantasy Flight Games. ASIN 1589945034
  3. 3.0 3.1 3.2 Golden, Christie (May 22, 2007). StarCraft: The Dark Templar Saga #1: Firstborn. Simon & Schuster (Pocket Star). ISBN 978-0-7434-7125-1.
  4. 4.0 4.1 4.2 4.3 4.4 4.5 Golden, Christie (November 27, 2007). StarCraft: The Dark Templar Saga #2: Shadow Hunters. Simon & Schuster (Pocket Star). ISBN 978-0-7434-7126-8.
  5. 2009-04-04. Samwise Didier, Dave Bergain. WWI 08 Coverage - StarCraft II Art Panel. StarCraft Legacy. Accessed 2009-06-17.
  6. 6.0 6.1 6.2 6.3 6.4 6.5 Underwood, Peter, Bill Roper, Chris Metzen and Jeffrey Vaughn. StarCraft (Manual). Irvine, Calif.: Blizzard Entertainment, 1998.
  7. Overmind: "Behold, there is a temple, not far from here, that lies upon ground most hallowed. Though I have born witness to the passing of countless millennia, the temple which you must assault is older by far. For it was constructed by my creators, the Xel'Naga, and it marks the site where the Xel'Naga first set foot upon Aiur." StarCraft. Vivendi Games. Level/area: Full Circle (in English). 1998.
  8. Watrous, Valerie. "Colossus." (Apr. 07, 2011). Blizzard Entertainment. StarCraft Lore: Colossus Accessed 2011-04-11.
  9. 9.0 9.1 9.2 Blizzard Entertainment. StarCraft II: Wings of Liberty. (Activision Blizzard). PC. Mission: Wings of Liberty, Echoes of the Future (in English). 2010-07-27.
  10. Blizzard Entertainment. StarCraft. Vivendi Games. Mission: The Invasion of Aiur (in English). 1998.
  11. Blizzard Entertainment. StarCraft. Vivendi Games. Mission: Full Circle (in English). 1998.
  12. Blizzard Entertainment. StarCraft. Vivendi Games. Cinematic: The Invasion of Aiur (in English). 1998.
  13. Fenix: "Executor, I bring news most dire. The Cerebrate that we thought we had killed has arisen again. The creature's battered form was reincarnated, despite the considerable damage we inflicted upon it. Even now, the Cerebrate drives its Brood in preparation for their next offensive." StarCraft. Vivendi Games. Level/area: Into the Flames (in English). 1998.
  14. Blizzard Entertainment. StarCraft. Vivendi Games. Mission: Into the Flames (in English). 1998.
  15. Blizzard Entertainment. StarCraft. Vivendi Games. Mission: Homeland (in English). 1998.
  16. Blizzard Entertainment. StarCraft. Vivendi Games. Mission: Eye of the Storm (in English). 1998.
  17. Blizzard Entertainment. StarCraft. Vivendi Games. Cinematic: The Death of the Overmind. (in English). 1998.
  18. Blizzard Entertainment. StarCraft. Vivendi Games. Cinematic: Epilogue (in English). 1998.
  19. Underwood, Peter, Chris Metzen and Bill Roper. StarCraft: Brood War (Manual). Irvine, Calif.: Blizzard Entertainment, 1998.
  20. Blizzard Entertainment. StarCraft: Brood War. Vivendi Games. Mission: Escape from Aiur (in English). 1998.
  21. Blizzard Entertainment. StarCraft: Brood War. Vivendi Games. Mission: Dunes of Shakuras (in English). 1998.
  22. Jim Raynor: "Executor, my crew and I will remain here on Aiur and shut the gate down on this side. It's the only way to make sure that the Zerg won't send more reinforcements to Shakuras."
    Artanis: "You will be hopelessly outnumbered, and once the gate is shut down there will be no one to save you should you be overrun."
    Raynor: "Yeah, well... I'm a man of action. What can I say?"
    Fenix: "I shall remain with Raynor as well, Executor. My duty is to Aiur, after all."
    Artanis: "Farewell then, brave warriors. We will send through all the troops we can spare." StarCraft: Brood War. Vivendi Games. Level/area: Dunes of Shakuras (in English). 1998.
  23. Sarah Kerrigan: "When I contacted you both on Aiur, I told you about the new Overmind and about the UED that seeks to control it." StarCraft: Brood War. Vivendi Games. Level/area: Vile Disruption (in English). 1998.
  24. Blizzard Entertainment. StarCraft: Brood War. Vivendi Games. Mission: Emperor's Flight (in English). 1998.
  25. StarCraft: Brood War. Vivendi Games. Mission: Enslavers: Dark Vengeance bonus campaign, episode I: "The Rescue" (in English). 1999-02-05. StarCraft Map Archives
  26. 26.0 26.1 Golden, Christie (June 30, 2009). StarCraft: The Dark Templar Saga #3: Twilight. Simon & Schuster (Pocket Star). ISBN 978-0-7434-7129-9.
  27. The Art of Johnnie H. Estill II, Digital Paintings. Accessed on 2009-06-03
  28. 28.0 28.1 2014-11-07, StarCraft II Legacy of the Void Campaign Overview. YouTube, accessed on 2014-11-13
  29. 29.0 29.1 2015-10-16, The first mission of StarCraft 2: Legacy of the Void (Campaign gameplay & impressions). YouTube, accessed on 2015-10-18
  30. Blizzard Entertainment. StarCraft II: Legacy of the Void. (Activision Blizzard). YouTube. Cinematic: StarCraft II: Legacy of the Void opening (in English). 2015-09-13.
  31. 1998-09-11 Chain Lightning. StarCraft Compendium Map Archives. Accessed 2007-11-03.
  32. Blizzard Entertainment. StarCraft II Map Editor. (Activision Blizzard) (in English). July 27, 2010
  33. (October 10, 2012). RISK: StarCraft. USAopoly.

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