Alien Arches

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This article is about Alien Arches. You may be looking for Alien Arch Caches.

Alien Arches are large constructs of the Precursor Race. They resemble large gateways and have a bright green, semi-transparent portal within. The Prawn Suit and the Seamoth have the ability to enter Alien Arches.

When the player enters an Alien Arch, it plays an SFX similar to when a Warper warps the player.

Some of these are located within Alien Arch Caches, which are caverns containing the Alien Arches, found in certain biomes. Only one of these caches contains a Principal Arch, while the other five contain Auxiliary Arches. The player is able to walk on the seafloor when inside these caches.

Arch Types

Principal

The Principal Arches have pedestals and must be powered using an Ion Cube. They warp the player to an Auxiliary Alien Arch.

Auxiliary

The Auxiliary Alien Arches do not have pedestals, and their corresponding Principal Alien Arches must be activated before these gates can be used.

Locations

Location	Connects To	Coordinates
Mountain Island	Floating Island	340 61 903
Alien Thermal Plant	Quarantine Enforcement Platform	-35 -1210 112
Primary Containment Facility	Bulb Zone	327 -1429 -279
Primary Containment Facility	Crag Field	169 -1431 -367
Primary Containment Facility	Mushroom Forest	357 -1430 -313
Primary Containment Facility	Ghost Forest	189 -1428 -405
Primary Containment Facility Aquarium	Primary Containment Facility Moonpool	421 -1509 -628
Primary Containment Facility Aquarium	Mountains	273 -1568 -360

Location	Connects To	Coordinates
Floating Island	Mountain Island	-662 2 -1050
Bulb Zone	Primary Containment Facility	1356 -301 693
Crag Field	Primary Containment Facility	-52 -296 -1401
Ghost Forest	Primary Containment Facility	-886 -612 1040
Mushroom Forest	Primary Containment Facility	-803 -227 409
Quarantine Enforcement Platform	Alien Thermal Plant	384 -92 1137
Mountains	Primary Containment Facility	463 -165 1353
Primary Containment Facility Moonpool	Primary Containment Facility Aquarium	336 -1434 -478

Data Bank Entry

This structure's intended purpose is unclear.

Theories on Function:
- Ceremonial or religious role
- Industrial applications
- Advanced transportation network

Assessment: Further research required.


Scans indicate this arch was left inactive when the facility was abandoned. It likely served as an access point to the surface of the planet. It is much too small for the emperor to pass through, but would accommodate smaller lifeforms.

Gallery

SN TeleportScreenFX 01-0

SN PrecursorTeleporter 02-0

SN TeleporterScreenFX 02-0

v · d · e Architect objects in Subnautica

Main bases	Alien Thermal Plant Disease Research Facility Primary Containment Facility Quarantine Enforcement Platform

Lesser structures	Alien Arches Alien Vents Incubator Device Sonic Deterrent

Caches	Alien Arch Caches Lost River Laboratory Cache Sanctuary Caches

Other	Alien Data Terminal Alien Relics Alien Robot Alien Tablets Forcefield Control Ion Cube