Deep Secrets of the Earth is the seventeenth main quest in Horizon Zero Dawn.



  1. Go to Sunfall
  2. Go to the Citadel Courtyard
  3. Enter the Citadel
  4. Go to the Grand Balcony
  5. Climb down
  6. Use the Secret Entrance
  7. Explore the Project: Zero Dawn facility
  8. Enter Viewing Room
  9. Kill the Shadow Carja
  10. Enter Viewing Room
  11. Go to Processing
  12. Go to Central Projects
  13. Restore Power to The Door
  14. Enter Central Projects
  15. Kill the Eclipse
  16. Find the Entrance to Sobeck's Office
  17. Examine Elisabet Sobeck's Terminal


Deep Secrets of the Earth - Very Hard - No Damage - Video Guide01:06:40

Deep Secrets of the Earth - Very Hard - No Damage - Video Guide


Hologram Datapoints

Text Datapoints - Quest

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