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This article contains spoilers regarding the true ending of the game. Discretion is advised.

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The Alchemist mysteriously disappeared after the utter failure of his research.
The Observatory was state-of-the-art, and used only by the scientific elite of the island, which is to say, only the Alchemist.
The King's Alchemist used to conduct research on astronomy and astrology here (he was such a Sagittarius).

Location: On top of the Astrolab, at the Castle's summit
Previous biome(s): Astrolab (5 BSC only)
Next biome(s): Prisoners' Quarters (restarting the run)
Enemy Tier: 47
Runes and Blueprints
Blueprints from enemies Collector's Syringe

Fallen Collector Outfit, King Outfit, White King Outfit

Hazards: Electric field, floating spiked ball, walls of fire, spikes
Boss(es) The Collector

The Observatory is the lair of the Collector, who is the hidden true last boss of the game. This level can only be reached when playing with 5 BSC active and reveals the true ending of the story.

General information[edit | edit source]

Access and exit[edit | edit source]

The Observatory can only be accessed from Astrolab while playing in 5 BSC difficulty. Finishing the fight or losing to the collector are the only way of exiting this level.

Exclusive Blueprints[edit | edit source]

Beating the Collector will award the following blueprint:

Collector Outfit and King Outfits[edit | edit source]

Beating the Collector will also reward the player with his outfit and the King's outfits. There are 2 King outfits, one is for defeating the Collector while possessing the King, the other is for finishing the fight without taking damage.

  • 2nd kill - Collector Outfit
  • 1st kill while possessing the King - King Outfit
  • 1st kill without taking damage - White King Outfit

Lore[edit | edit source]

The Collector[edit | edit source]

See the main article for information about the Collector.

Notes[edit | edit source]

  • This biome was added with update v1.2, also known as the Rise of the Giant DLC, released on March 28th, 2019.

Gallery[edit | edit source]