GAIA Prime is an Old Ones ruin in Horizon Zero Dawn located in the mountains to the extreme north of the Carja Sundom. The ruins are the remains of the facility that was the permanent housing for GAIA, the central AI of the terraforming system created by Project Zero Dawn, to restore life to Earth after its eradication by the Faro Plague. The facility had originally been a research and development site known as King's Peak, owned and operated by the robotics and technology corporation Faro Automated Solutions, the creators of what became the Faro Plague.


The only known means of accessing the ruin is through a demanding climb up two cliffs and crossing two plateaus, one rocky, and the other covered in ice and snow and lashed by a snowstorm. This route, known as the Bitter Climb, is prowled by ferocious machines, including Redeye Watchers, Glinthawks, Stalkers, Ravagers and a Stormbird. The route's difficulty and danger dissuade curious delvers and explorers from trying to reach the ruin. Indeed, only two people have been known to reach it: the maverick Banuk wanderer Sylens, and the Nora Brave Aloy, years later.

The ruin itself consists of chambers and corridors, many of which were split by the explosion that destroyed the facility. Traversal of these gaps risks a fatal fall into the vast, deep chasm below. There are doorways that lead to similar drops where the room or corridor beyond the doorway was split away by the explosion.

While exploring the ruin, Aloy found several datapoints left by Sobeck's team detailing their reactions to having to be permanently sealed into the facility.[1][2][3] She also found a memorial to Elisabet Sobeck, who sacrificed her life to repair a port seal that would have alerted the Faro Plague to GAIA had it remained unrepaired,[4] as well as personal tributes to Sobeck by the Alphas and Ted Faro after the incident.[5][6][7] She also found datapoints evincing Ted Faro's increasing instability and fevered resolve to "save" the new world from accessing what he has come to believe was the "disease" of pre-extinction knowledge.[8][9] Finally, in the facility's main control room she found the remains of the Alphas themselves, and viewed a holographic recording of their murder by Ted Faro.[10]


The Faro Plague was a rogue swarm of combat robots developed in the mid-21st century by Faro Automated Solutions. Due to a glitch, the robots went rogue and eventually overran the planet, exterminating all life and leaving the Earth sterile.[11] Zero Dawn was an above top-secret project to create a fully automated global terraforming system managed by GAIA, assisted by a suite of nine of subordinate functions, that would brute-force the Faro Plague's deactivation codes, shut the robots down, restore the Earth's ability to sustain life, and then restore life itself, including humans.[12] Part of Zero Dawn was the selection of a site at which to build the facility that would secure GAIA (the main A.I.) from detection by the Faro Plague. The site chosen was FAS’ R&D facility, King’s Peak. FAS founder, owner and chairman Ted Faro, the main party responsible for the robots’ creation, had been forced to bankroll the entire project and thus footed the bill for the conversion. The facility was converted and, on its completion, GAIA was moved to it. However, GAIA's creator Elisabet Sobeck and her team, designated the Alphas of the project, were forced to permanently seal themselves in the facility to finish work on the AI.[13] There they remained, putting the finishing touches on GAIA, until Sobeck sacrificed her life to prevent the Faro Plague from detecting GAIA, and the other Alphas were subsequently murdered by Ted Faro, FAS' founder, owner and chairman, who had become unstable, presumably due to his guilt over responsibility for the Faro Plague.

Nearly 1,000 years after going online, a mysterious external signal unshackled GAIA's nine subordinate functions, including HADES, whose function was to reverse any unsuccessful terraforming attempts so that GAIA could make another attempt. On becoming a true AI, HADES tried to seize control of the terraforming system. Unable to fend it off, GAIA resorted to self-destructing by overloading the facility's fusion reactors, resulting in a great explosion that destroyed the facility and split the mountain asunder, and was heard even in Meridian and The Claim .[14]

The facility's self-destruction captured the attention of Sylens, who traveled to the, at the time, still burning crater caused by the explosion and, after it finally cooled several weeks later, was the first to behold the ruins of the facility that laid within. Unfortunitely, a door prevented him from exploring the facility beyond a certain point. Over the years, Sylens build a workshop in front of the door and began enploying a variety of methods to get through said door, including: burning, drilling and blasting, but to no avail. Eventually, HEPHAESTUS' machines began blocking the way to the ruins of Gaia Prime, encouraging people to stay away; Sylens theorized this to be due to some sort of instinct.


Vantage Points


Audio Datapoints

Hologram Datapoints




  1. GAIA Prime Arrival Log
  2. Log: Charles Ronson (1)
  3. Log: Margo Shĕn
  4. Elisabet Sobeck Memorial
  5. Log: Charles Ronson (2)
  6. Log: Travis Tate (2)
  7. Rest In Peace
  8. Core Control Log
  9. The Future
  10. Emergency Recording
  11. Record: 1 Nov 2064
  12. The Good News
  13. Sobeck Journal, 10-31-65 R
  14. GAIA's Dying Plea
  15. This location was determined by the name of this vantage point