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Purple Tablet

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The Purple Tablet is a key Alien Technology item in Subnautica, used to unlock doors in the Quarantine Enforcement Platform and other facilities. It can be crafted using an Ion Cube and two Diamonds after scanning a fragment.

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Purple Tablet

Purple Tablet

Description: Ancient tablet with a purple symbol.

Overview

The Purple Tablet is usually the first Alien Tablet to be found and is frequently used in various locations throughout the game. There are currently eight working tablets found in total.

Locations

Usage

The Purple Tablet is essential for progressing through several major story locations:

  • Quarantine Enforcement Platform (QEP): Requires two tablets to unlock either the upper entrance of the anti-gravity elevator or the control room. The two tablets needed for these doors can be found onsite: three on Mountain Island, two in the Mountain Island's Caves, one below the underwater Alien Arch Platform near the QEP, and one inside the facility in the room before the deactivation terminal.
  • Sanctuary Caches: Can be used optionally to access the three Sanctuary Caches (1 tablet per cache).
  • Disease Research Facility: Used to unlock certain doors (1 tablet).
  • Alien Thermal Plant: Used to unlock certain doors (2 tablets).

In total, 3 tablets are required to beat the game if swimming through the QEP moonpool entrance skips two forcefields.

Structure Requirements

StructureTablets Required
Quarantine Enforcement Platform2
Disease Research Facility1
Alien Thermal Plant2
Sanctuary Cache1 each (Total 3)

Crafting

After scanning the broken Purple Tablet Fragment located in front of the Quarantine Enforcement Platform's land entrance, players can craft Purple Tablets at the Fabricator.

Recipe

Ion Crystal + Diamond + Diamond → Fabricator → Purple Tablet

Ingredients:

Alternatively, players can scan an intact Purple Tablet either before picking it up or by discarding it.

Data Bank Entry

Data Bank Entry

This carbon-based device is lighter than it looks and features a symbol which resembles a 'U', lit up in purple. Despite the onboard power still functioning, algae growth on the exterior indicates it was abandoned hundreds, perhaps thousands of years ago. While the technology is far beyond Federation levels, and there is no obvious way to interface with it, it should nonetheless be possible to fabricate a precise physical copy of the device, if necessary.

Achievement

Ancient Technologies Find the Enforcement Platform

How to obtain: The player has to reach the Mountain Island and find the Quarantine Enforcement Platform.

Achievement Icon

  • The Purple Tablet
  • A Purple Tablet in the Quarantine Enforcement Platform
  • The Purple Tablet just above the Quarantine Enforcement Platform on Mountain Island
  • Another of the eight Purple Tablet on Mountain Island at night
  • The broken Purple Tablet Fragment
  • Purple Tablet In-game

Trivia

The purple tablet is the only tablet that has scannable fragments.

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