Read at own risk This article contains unmarked spoilers. Players new to the game would want to avoid or be cautious toward this article. |
The Alien Bases are ancient structures found in many different biomes across the crater. They were built by the Precursors about one millennium previous to the crash of the Aurora spaceship.
Four Alien Bases exist in total, on the Mountain Island the Quarantine Enforcement Platform, in the Lava Castle the Alien Thermal Plant, in the Lost River the Disease Research Facility, and in the Lava Lakes the Primary Containment Facility. Alien Data Terminals can be found within each, explaining the functions and purposes of the Bases. While there are optional Alien Caches scattered throughout the world, these Bases are extremely vital to the story and must be visited.
Bases[]
Main Bases[]
Base | Location | Description | Goto ID |
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Quarantine Enforcement Platform |
A massive alien weapon system that is located on the Mountain Island. |
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Disease Research Facility |
A destroyed alien base located in a cave located in the Lost River. |
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Alien Thermal Plant |
A thermal generator that is is the source of power for all of the Alien technology on Planet 4546B. |
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Primary Containment Facility |
An alien base located in the Lava Lakes that holds the last known Sea Emperor species. |
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Caches[]
Caches are smaller bases found throughout the world that were designed for smaller purposes then the larger bases. Most caches are known as sanctuaries and were created to upload a Precursors mind into the nearby data hubs in case of emergency. The only cache that does not serve as a sanctuary is the Lost River Laboratory Cache.
All the Sancutary Caches must be unlocked with a Purple Tablet while the Lost River Laboratory Cache must be unlocked with a Orange Tablet.
Base | Location | Description | Coordinates |
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Blood Kelp Zone Sanctuary Cache |
A small cache set up in the Northern Blood Kelp Zone. |
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Deep Sparse Reef Sanctuary Cache |
A small cache set up in the Deep Sparse Reef. |
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Dunes Sanctuary Cache |
A small cache set up in a meteor impact site in the Dunes. |
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Lost River Laboratory Cache |
A lab setup to study various Flora and Fauna species as well as a large Fossil. |
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Achievements[]
Spoiler alert: The following section contains story related material.
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Ancient Technologies Find the Enforcement Platform
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Spoiler alert: The following section contains story related material.
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Follow the Lost River Find the Disease Research Facility
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Spoiler alert: The following section contains story related material.
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Thermal Activity Find the Thermal Plant
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Spoiler alert: The following section contains story related material.
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Fourteen Thousand Leagues Under the Sea Find the Primary Containment Facility
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Gallery[]
Quarantine Enforcement Platform[]
Disease Research Facility[]
Alien Thermal Plant[]
Primary Containment Facility[]
Other[]
Trivia[]
- Models for the Quarantine Enforcement Platform and various parts of bases were accidentally revealed during an experimental patch that added them into the entity gallery. A user on the forums revealed screenshots of the bases and they spread quickly. After seeing this, the developers quickly removed them and asked pictures of them to be prevented from spreading; they called it "a huge screw up".
- The small structures that surround some of these bases are sonic deterrents, designed to keep predatory fauna from attacking the bases. However, they do not function in gameplay, and will not deter hostile creatures from attacking the player.
Precursor objects in Subnautica | |
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Main bases | |
Lesser structures | |
Caches | |
Other |