Horizon Wiki
"The lesson will be taught in due time, Aloy. Until then, we wait."
This article contains heavy spoilers. Read ahead with caution.

This is the Timeline of all major events and happenings in the Horizon universe, divided into sections representing the world before and after the Faro Plague. All dates are in Anno Domini (AD). Other date formats will be in parentheses.

The Old World

21st Century


DECEMBER 24 - Ted Faro is born.[1]


The United States Interior Department removes the grizzly bear from its endangered species list.[2]


MARCH 11 - Elisabet Sobeck is born in Carson City, Nevada, USA.[3]
Start of the "Snoring '20s", a series of rapidly worsening climate crises leading up to the Die-Off of the following decade.[4]


OCTOBER - Atbay Global Infrastructure is founded by Kenzo Sasaki.[5]


Approximate year Tilda van der Meer is born in Rotterdam, Netherlands.[6]


Indian scientist Nikhita Arand engineers the biofuel knows as Rama5.[7]


SEPTEMBER - Category 6 Hurricane Omeka devastates O'ahu.[8]


Ted Faro enrolls in the University of California Los Angeles and majors in Business.[1]
Federal funding is withdrawn for Yellowstone National Park: ownership of the park is given to the State of Wyoming.[9]


Ted Faro drops out of UCLA to found Faro Automated Solutions.[1]
Elisabeth Sobeck enrolls in Stanford University. She later graduates with a Bachelor's of Science in Experimental Physics and Computer Science.[3]
During the Great Die-Off, the Azores sink into the sea.[10]
Rotterdam is flooded as a result of a cyberterrorist attack, killing thousands, including the parents of Tilda van der Meer.[6]


The 2034 Clone Provisions are enacted.[11]


Stanley Chen bets all his remaining money on a roulette wheel and, in an extraordinary turn of luck, earned $3.2 million.[12][13]


New Zealand is submerged during the 2036 Submergence.[14]
Estimated year of Margo Shĕn's birth.[15]
Estimated year of Verbena Sutter's birth.


AUGUST 20 - U.S. Robot Command initiated Operation: Unity, dispatching a heavy machine strike on JTF-10's Mojave base in an effort to capture Roberto Medina, Colonel De La Hoya and other hot zone leaders alive. The strike ended in an explosion (likely caused by a JFT-10 munition cracking the power casing of a G-Syn battle drone) that leveled the base and decimated the two opposing forces. Nearly all present were killed, including Medina and De La Hoya, as well as some 900 refugees sheltered nearby. The carnage prompted an immediate end to the Hot Zone Crisis.[16]


Climate refugees in the Thamesmead Emergency Relocation Facility cause a riot in response to being treated poorly by their British handlers. Thousands of refugees are killed or injured after a panicked response from the UK government.[10]
Environmental degradation is at an all-time high.[17]


Bioterrorist and Naysay Doom cult member Harriet Choi engineers the "Doom Plague" viral cocktail which scourges New York, London, Moscow, Tokyo, and Shanghai. Choi is captured and sentenced to life imprisonment after providing information which led to the subsequent arrest of sixteen higher-ranking members of Naysay Doom and the cult's collapse.[18]


Elisabet Sobeck obtains her Ph.D in Robotics and Artificial Intelligence Design at Carnegie-Mellon University.
Elisabet Sobeck joins Faro Automated Solutions as a Junior Scientist.
Start of the "Claw-Back" decade - Faro Automated Solutions begin marketing a series of environmentally-friendly robot systems to help environmental cleanup and detoxification efforts.[1]

Estimated year of Bashar Mati's birth.[19]

JANUARY 3 - a suicide pact known as Project GG/EZ is organized in San Francisco. Over 200 people simultaneously leap into their deaths from the Golden Gate Bridge.[20]
MAY - Stanley Chen begins construction of the Fountain dome that will surround Las Vegas.[12]


The Citarum River nanotech disaster devastates Indonesia.[21]
Chinese corporation Xiaolu Lunar Inc. starts mining Helium-3 on the Moon's Tycho Crater.[7]
MARCH - the Odyssey project, Earth's first colony ship, commences development.[22]


Elisabet Sobeck becomes FAS' Chief Scientist at the age of 22.
FAS relocates from San Francisco to Salt Lake City.[23]


Refugees begin to return to Singapore as sea levels recede thanks to the efforts of the Claw-Back.[4]


In response to the "escape" of climate-intervention AI VAST SILVER, the Turing Act is hurriedly passed in the United States to establish strict limits on the sentience of machine intelligences. The MIE is founded to oversee the development and sale of AI.[24]
MARCH - The Juventas Center, a luxury Beverly Hills clinic dedicated to regeneration and life-extension therapies, is destroyed in a suicide bombing. As well as killing five clinic staff, the attack claimed the life of tech billionaire Aubrey Hopkins. The radical group Wheel of Life claims responsibility for the terror attack.[25]


The United States Air Force is mentioned by this point to be 60-70% automated. The USAF Academy at Colorado Springs was offering a 300-level class called "The Age of Human Airpower."[19]
Ted Faro provides funding to Yellowstone for "as-yet-unspecified new facilities".[26]


DECEMBER 23 - First level of the Firebreak facility infrastructure is completed.[27]


Stanley Chen Elementary is opened.[13]


FAS opens its military technology branch.
Elisabet Sobeck quits FAS in protest of its move from green robotics to automated defense systems.
The 2048 Raleigh Accords are passed.[11]
JUNE 5 - Aamaal Mati dies protecting Metallurgic International's claim to a tantalum mine.[19]


Elisabet Sobeck founds Miriam Technologies with an emphasis on green robotics.[3] Relations with Ted Faro deteriorate, and this marks the beginning of a series of lawsuits from Faro to Sobeck.
A massive engineering project spearheaded by Netherlands-based company Cape Vertegaal and Atbay Global Infrastructure saves San Francisco from flooding by segmenting the city into flood control zones.[28]


In response to increased automation, many Americans emigrate to China in search of work opportunities during this decade.[29][30][31][32][33]


The Syzygy/East nuclear disaster occurs after the region is rocked by a series of earthquakes. Dr. Susanne Alpert was part of the Syzygy/East response team that was ultimately unable to prevent the radiation from rendering the region uninhabitable.[34]
NOVEMBER 23 - Sergeant Woolyknickers, the last known grizzly bear, is found dead in Yellowstone National Park.[2]


The United Kingdom's Royal Air Force decommissions all human soldiers in favor of automated combat forces.[35] The rest of the British Armed Forces would follow suit the same year.


Miriam Technologies wins the 2053 Nobel Prize for Physics for its green robots.[3]
FAS at this point dominates the military market with its automated defense platforms.


The first major arrest of virtual protesters occurred over the occupation of Metallurgic International's holographic customer service center.[36]


The U.S. armed forces disband all human combat forces in favor of a fully automated military.[29]


Miriam Technologies wins the 2056 Rachel Carson Award for Environmental Progress.[3]


JULY 7 - Plans to construct Earth's first colony ship, the Odyssey, grind to a halt. What exists of the vessel is abandoned in orbit.[37]


Aaron Herres is appointed Chairman of the United States' Joint Chiefs of Staff.[38]
MARCH 18 - Mosquitoes are completely exterminated.[39]
MAY 8 - The Climate Refugee Memorial Museum is opened in London.[10]
JUNE 8 - The Center for the Liberation of Bodiless Intelligence, an AI activist group, organizes a nationwide day of protest against the Turing Act.[24]


JANUARY 9 - U.S. Presidential candidate Lacy Almodovar announces her intentions of overturning Schott v. Frost - a Supreme Court decision granting corporations the right to run for and hold political office through proxy candidates. However, Almodovar's anti-corporate stance is strongly doubted by critics as her campaign was supported by Metallurgic International.[40]
FEBRUARY 28 - Far Zenith purchases the Odyssey and announces their intention of rebuilding the colony ship.[41]
May 3 - Verbena Sutter is engaged for the 17th time.[42]


JANUARY 1 - The Haere Mai Program is implemented by New Zealand Prime Minister Tama Ngata to encourage thousands of New Zealander transplants to return to New Zealand, which has been mostly rebuilt through investment in the nanotech construction industry.[14]
MAY 1 - 75% of the United Kingdom's veterans are unable to cover living expenses with their pension as funding of the National Health Service is gradually siphoned into the coffers of corporate healthcare providers.[35]
JULY 4 - The hacker collective Idiot Army release a terabyte of internal correspondences from Xiaolu Lunar Resources, Inc., sparking rumors that the Shanghai-based lunar mining company is preparing to downsize considerably.[33]
DECEMBER 22 - The US-backed Hartz corporation seizes control of the Bahamas after a fierce robot-on-robot war with the Colombia-based combine TG Communications.[43]


APRIL 29 - One of the largest synchronized police actions in US history. The homes of more than seven hundred private citizens were raided, and more than five hundred arrests were made for the crime of "inciting criminal behavior using private informational processes." News media debates the legality of the raids and the justification.[36]
SEPTEMBER 2 - Harriet Choi dies of lung cancer at the age of 54.[18]


JULY 7 - FAS arranges a meeting with representatives of the Indo-Malay Agricultural Combine and FreshGrounds Coffee Global. The meeting turns violent as the Indo-Malay Combine and FreshGrounds are enemies; this was intended by FAS to encourage their conflict and bidding on FAS' contracts.[44][45]
OCTOBER 31 - Ted Faro and Elisabet Sobeck meet to discuss a rapidly worsening crisis concerning a unit of FAS’ Chariot line of peacekeeper robots sold to the Hartz-Timor Energy Combine, which ceases responding to commands or stand down codes.[46]
NOVEMBER 1 - Elisabet Sobeck informs Ted Faro of her analysis of the Chariot line crisis. The situation is apocalyptic. The robots have gone rogue, are exponentially multiplying, and their biomatter conversion, previously an emergency fuel supply measure, has become their default method of refueling. She projects that the swarm will strip the entire planet of life within 15 months.[47]
NOVEMBER 3 - Elisabet strong-arms Ted Faro into funding Project Zero Dawn. She later meets with General Aaron Herres and the Joint Chiefs of Staff inside U.S. Robot Command.[48]
NOVEMBER 12 - Bashar Mati begins his 12-day "Apocashitstorm Tour," planting Vantage spikes throughout the Utah and Colorado area.[49]
NOVEMBER 20 -Ted Faro begins construction of Thebes.[50]
Project Zero Dawn commences development.
Operation: Enduring Victory is implemented.


JANUARY - Project Zero Dawn trades ectogenic chambers from Far Zenith in exchange for a copy of the APOLLO archive.[51]

FEBRUARY 3 - Elisabet Sobeck tells a story to GAIA about her childhood and her mother.[52]
MARCH 27 - During a conversation between Elisabet Sobeck and GAIA, GAIA first develops a sense of sadness regarding to the Quaternary Extinction Event.[53]
APRIL 1 - Far Zenith spokesman Osvald Dalgaard publicly announces that construction of the Odyssey is complete and it is in preparation to leave Earth as soon as possible.[54]
JUNE 5 - Elisabet Sobeck and Ted Faro argue over installing a kill switch in GAIA. GAIA breaks the stalemate and voluntarily accepts it as a necessary safeguard.[55]
JULY 15 - The Odyssey is launched away from Earth's orbit. Far Zenith falsify the ship's destruction in a telemetry to Elisabet Sobeck for unknown reasons.[56][57]
OCTOBER - The Faro Swarm hits the western coast of the United States.[58]
NOVEMBER - Estimated date for the complete collapse of atmospheric oxygen, after which human soldiers require rebreather apparatuses to operate in the open and civilians will only be able to survive inside sealed structures.[17]


JANUARY 13 - As the Faro Plague begins to wipe out the last remnants of life on Earth, GAIA comforts Elisabet Sobeck by reassuring her that Project Zero Dawn will succeed.[59]
JANUARY 15 - General Herres informs Elisabet Sobeck that a projected collapse of the front lines at Wichita, Kansas has happened and U.S. Robotics Command will be assaulted by five Horus-class Titans in 34 hours. General Herres gives his testimonial to Sobeck to be archived in APOLLO before making his final farewell to Sobeck.[60][38]
GAIA Prime facility seals itself. A malfunction at one of the hatches is detected that will allow a signal to bleed out, alerting the Faro Plague. Elisabet Sobeck equips an armored environment suit and seals the hatch, but is stranded outside.
FEBRUARY 2 - Ted Faro's increasingly erratic behavior reaches its peak, and he locks out all GAIA Prime Alphas. Ted then purges the APOLLO database and kills all GAIA Prime personnel.[61]
FEBRUARY - Estimated date of the annihilation of exposed human populations.[17]
MARCH - Estimated date of the extinction of macrobiotic land organisms.[17]


Estimated year of the extinction of marine life.[17]

22nd Century


Estimated year for GAIA to decrypt and generate deactivation codes to the machine swarm and build MINERVA transmission arrays to broadcast them.[62]


HADES is activated, resetting a non-viable biosphere.


Second activation of HADES, resetting another non-viable biosphere.


Third activation of HADES, resetting once again a non-viable biosphere. Final activation of HADES before terraforming operations are successful.

24th Century


March 16 - ELEUTHIA CRADLE E9 releases its inhabitants due to exhaustion of the food supply. Cradle E9 suspends operations and seals itself.[63]


Originally-estimated year for the terraforming process to be minimally capable of supporting life.


Originally-estimated year for ELEUTHIA Cradle facilities to begin artificially gestating humans, raising them and educating them via APOLLO's Education and Archive systems.


Estimated year when the Odyssey reaches the Sirius star system.[64]


Originally-estimated earliest possible year where humans can begin repopulating the world.

The New World

28th Century


Estimated time of the foundation of the Tenakth and the beginning of the Clan Wars.[65]

28th-29th Century


Estimated time of the first Carja expedition into the land west of The Daunt, led by the 6th Sun-King Bold Iriv. After which, the 7th Sun-King Prudent Basadid constructed Sunfall and dubbing the area the Forbidden West.[66][67]

30th Century


Estimated time of the failed Carja colonization of Nora territory by the 8th Sun-King Khuvadin, and the subsequent construction of Daytower.[66]
Estimated time of the Tenakth invasion of The Sundom Carja territory, defended by the 9th Sun-King Ranan The Firebird.[66]


Estimated year in which Rost was born in the Nora settlement of Forsaken Village, which was erstwhile called Mother's Vigil.

31st Century


January - The Far Zenith colony on the Sirius system is destroyed by the rogue AI known as Nemesis, which then transmits a signal to GAIA with the intent of transforming the HADES subfunction into an independent AI. Its goal is to destroy Earth's restored biosphere and thus deny the planet's sanctuary to Far Zenith survivors.[64][68]


Estimated year in which Jiran becomes the 13th Sun-King of the Carja.

3020 - The events of Horizon Zero Dawn begin

The Sawtooth is first sighted in spring of this year.[69]
AUGUST 26 08:45 - Nemesis' signal is received by GAIA, causing her subordinate functions to become erratic and self-aware. The subfunction HADES attempts to seize control of the terraforming system. GAIA initiates a self-destruction of GAIA Prime's reactor to prevent it, and on the same day ELEUTHIA CRADLE E9 is ordered to begin gestation of #LK1A1-4510. That same day, Hekarro conquers the Memorial Grove, unifying the Tenakth and ending the centuries-long Clan Wars.[65]
The mountain containing GAIA Prime is destroyed in a massive explosion, and its effects are seen as far away as Meridian. Many religious figures contemplate on this event, seeing it as an ominous sign.


APRIL 4 09:30 - Aloy is born in ELEUTHIA CRADLE E9 - BROOD 1 facility. She is subsequently taken in by members of the Nora tribe, but later cast out by them. Aloy is given to Rost.[70][63]
OCTOBER - Aloy is named by Rost with the blessing of High Matriarch Teersa.


Autumn - The Stalker is first encountered by the Carja.[69]


Aloy falls into a subterranean ruin and obtains a Focus.
Aloy begins her training with Rost to participate in the Proving.


Estimated year of the beginning of the Red Raids.


APRIL - Nemesis learns of HADES' failure to take control of the terraforming system. It stops broadcasting the signal and prepares to leave for Earth in order to finish Far Zenith itself.


The Thunderjaw is first encountered by the Carja in the summer of this year.[69]
The Sawtooth is first encountered by the Nora and Oseram.


Sun-King Jiran decides that the human sacrifices in the Sun-Ring of Meridian are not enough, and begins sacrificing slaves in Sunfall as well. When several of Jiran's loyal Kestrel guards are killed during the inaugural ceremony, he announces that the Sun will accept their lives as tribute, along with those of the slaves.[71]


Estimated year in which Prince Itamen is born to Jiran and his queen Nasadi.


CYAN mistakenly grants HEPHAESTUS access to her systems, and is taken over by the rogue AI. She requests Ourea's help, but Ourea is captured by the Carja and brought to Meridian.
Estimated year when Fashav is captured by the Tenakth after the Battle of Cinnabar Sands during the Red Raids.[72]
Estimated year when the Carja are defeated by the Tenakth in the Battle of the Burning Blooms during the Red Raids.[73]


Ersa is captured and is sent to the Sun-Ring to be sacrificed. She kills two kestrels and earns the honor of becoming a palace slave. Ersa becomes friends with Prince Avad, who secretly frees her so she may return home.


Jiran executes his son and favored heir Prince Kadaman for the crime of demanding an end to the raids and sacrifices. Second-in-line Prince Avad flees into Oseram territory the next day with loyal soldiers.
Avad makes an alliance with Ersa and the Oseram to overthrow Jiran and spends several months preparing to take Meridian.
Liberation of Meridian - Jiran is overthrown by his son Avad with help from Oseram freebooters and Carja rebels. Avad becomes the 14th Sun-King and ends the Red Raids. Loyalist forces call this day the "Fall of Meridian." Helis flees to Sunfall with Prince Itamen, Dowager Queen Nasadi and High Sun-Priest Bahavas.
The Carja Civil War begins. Loyalists of the Mad Sun-King clash with followers of the 14th Sun-King and his Oseram allies. The Shadow Carja take the Citadel at Sunfall and the surrounding areas as their capital.
Sylens, under the guidance of HADES, recruits members of the Shadow Carja and the Mad King's champion Helis to form The Eclipse.


Estimated year when Ourea returns to her home, which is now referred to as The Cut.


Estimated year when the Quen expedition makes landfall in the Isle of Spires.
Aloy journeys to Mother's Heart to participate in the Proving. There she meets Olin and Erend. Eclipse warriors massacre the Proving participants in an attempt to kill Aloy. Rost is mortally wounded.
Aloy begins her journey into the world outside the Sacred Lands, seeking the truth that would eventually lead her to discover Project Zero Dawn.
Aloy foils Dervahl's plot to destroy Meridian.
The genocidal attack against the Nora was launched by Helis during Aloy's imprisonment in the Sun-Ring, but Aloy and the rest of the Nora Braves prevailed and halted it.
Aloy discovers the truth of her birth from a message by GAIA.[74]
The Battle of the Alight is initiated in Meridian. Aloy and her allies prevailed against Helis and his Eclipse troops. Aloy purges HADES from Zero Dawn with the Master Override from Sylens' Lance. HADES is launched from the orb and captured by Sylens, who intended for this to happen, in a lantern-like device.
The night after the battle, Aloy departs to begin searching for a backup of GAIA.

3041 - the events of Horizon Forbidden West begin

Six months after the Battle of the Alight, Aloy and Varl explore a Far Zenith facility and soon after begin a journey to the Forbidden West.
Sylens provides the Oseram warlord Asera with override technology, forming the Sons of Prometheus.
Regalla and her rebels ambush the Embassy outside Barren Light and slaughter most of those attending, thus launching the rebellion against Hekarro.
Aloy finds HADES in a crippled state outside a Zero Dawn facility. After failing to get any useful information out of the AI, she uses the Master Override to purge it for good. She finds an intact backup of GAIA inside the facility and encounters Far Zenith for the first time.
Inside a Far Zenith research facility, Aloy discovers Beta, the Zeniths' clone of Elisabet Sobeck. After fighting their way through Specters, they successfully rescue Beta and bring her back to their Base.
Aloy successfully merges AETHER, POSEIDON, and DEMETER with GAIA.
Aloy journeys to Thebes, retrieves Omega Clearance, and discovers Ted Faro's fate.
Aloy, Beta and Varl journey to Cauldron GEMINI to upload GAIA and merge HEPHAESTUS with her. However, they are detected by the Zeniths, and Varl is slain by Erik Visser.
Aloy defeats Regalla in single combat, effectively ending the rebellion.
The Sons of Prometheus are defeated and Asera is killed by Aloy and Erend.
A final attack is launched on the Far Zenith's base. All the Zeniths are killed save for Tilda van der Meer. Tilda later betrays Aloy, having convinced her that she was against the Zenith's mission. Tilda and Aloy engage in a final battle, emerging with Aloy as the victor.
Aloy learns of Nemesis and sends her allies across the known world to herald its arrival.

64th Century


The latest projected time for which CYAN will be able to maintain stability of the Yellowstone Caldera.[75]


  1. 1.0 1.1 1.2 1.3 Bio: Ted Faro
  2. 2.0 2.1 Goodbye Grizzly
  3. 3.0 3.1 3.2 3.3 3.4 Bio: Elisabet Sobeck
  4. 4.0 4.1 Return to Singapore
  5. Aloy: "Huh, this says the code is the month and year the company was founded."
    Alva: "According to the Legacy, it was October 2023."
  6. 6.0 6.1 Retrospective: Rotterdam 2033
  7. 7.0 7.1 Rama5: 30 Years On
  8. A Hui Hou
  9. Will tourists return?
  10. 10.0 10.1 10.2 Refugee museum opens
  11. 11.0 11.1 In-game hologram during Deep Secrets of the Earth
  12. 12.0 12.1 Stanley Chen: Looking Back
  13. 13.0 13.1 Las Vegas Timeline
  14. 14.0 14.1 "Haere Mai"
  15. GAIA Prime Arrival Log
  16. Crater Memorial
  17. 17.0 17.1 17.2 17.3 17.4 Biosphere Degradation
  18. 18.0 18.1 Harriet Choi Dies
  19. 19.0 19.1 19.2 Air Combat Academy
  20. 20 Years After GG/EZ
  21. We Were Indonesia
  22. Odyssey Injustice?
  23. Trellago Relocates
  24. 24.0 24.1 Turing Act criticized
  25. Beverly Hills Terror Attack
  26. Will tourists return?
  27. Stage 2 Complete
  28. Delta Engineer Crijns Declines Key to City
  29. 29.0 29.1 Log: Cpl. Sarai (B)
  30. China-Sick
  31. Jeff Andreatis Show
  32. ConveyAway
  33. 33.0 33.1 Leaks spark fears
  34. Interview: Susanne Alpert
  35. 35.0 35.1 UK vets struggle
  36. 36.0 36.1 1st Amendment Virtual?
  37. Odyssey to Nowhere
  38. 38.0 38.1 Herres Testimonial
  39. Mourn mosquitoes?
  40. Schott v. Frost
  41. Dalgaard on FZ
  42. Verbena's Engaged Again!
  43. Hartz wins Bahamas
  44. Reception Log
  45. Re: Complaint
  46. Record: 31 Oct 2064
  47. Record: 1 Nov 2064
  48. Record: 3 Nov 2064
  49. Bryce Orbital
  50. NDA Motherload
  51. Spoon-Fed
  52. Gaia Log: 3 Feb 2065 R
  53. Gaia Log: 27 March 2065
  54. Odyssey ready?
  55. Gaia Log: 5 June 2065
  56. Sobeck Journal, 7-16-65 R
  57. Odyssey Has Failed
  58. Sobeck Journal, 10-31-65 R
  59. Gaia Log: 13 January 2066
  60. SecureCom EVZD-XX1X011X
  61. Emergency Recording
  62. The Good News
  63. 63.0 63.1 Operations Log
  64. 64.0 64.1 Dialog with GAIA during The Eye of the Earth
  65. 65.0 65.1 Dialog with Hekarro during The Broken Sky
  66. 66.0 66.1 66.2 The Sun-Kings
  67. History of Sunfall
  68. Dialog with Tilda during Singularity
  69. 69.0 69.1 69.2 Legendary Hunts
  70. Chamber B1-001
  71. History of Sunfall
  72. Dialog with Avad during The Point of the Lance
  73. Amadis during Need to Know
  74. GAIA's Dying Plea
  75. Conversation with CYAN during The Forge of Winter