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Key Items

Archive Tower Giant Door Key

Key Items

Opens the large doors at the top of the prison tower. This is the normal way back into the main Archives after imprisonment.

Weight0

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Reference values

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Technical details

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In-game description

Key to the giant door leading out from
the uppermost floor of Archive Tower,
which now serves as a prison.

The key's design resembles not the key of a
prison; indeed, the tower was once no prison
at all, but a trove of precious tomes.

Where to find

Treasure pickup

Duke's Archives: alarm platform

After escaping your cell, descend the prison tower to the floor occupied by Pisacas. Climb the ladder to the raised gramophone platform.
Defeat the Serpent Soldiers and Serpent Mage on the platform. Turn off the gramophone to stop the alarm, then open the chest behind it for the Archive Tower Giant Door Key.
Return up the spiral stairs past the starting cell. Climb the ladder at the top and unlock the enormous doors leading back into the library.

Notes

Tower exit: Opens the large doors at the top of the prison tower. This is the normal way back into the main Archives after imprisonment.
Different giant lock: The similarly named Archive Tower Giant Cell Key is for Logan's cell below. This key is for the exit above.
Alarm controls: Stopping the gramophone changes the Pisacas' behavior. It does not itself unlock the prison exit or Logan's cell.
Later journeys: This key is removed when a new journey begins. Collect it again if you need to reopen its lock; unlocking the door in the previous journey does not keep it open.