Subterranean

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"Subterranean"
Connections
Drainage System Requires Karma 1
Farm Arrays Requires Karma 5
Shoreline Requires Karma 2
✔️DLC Pipeyard Requires Karma 3
✔️DLC Outer Expanse Locked; requires Karma 1 once unlocked
✔️DLC Waterfront Facility Requires Karma 2As Artificer, Spearmaster
✔️DLC Undergrowth Requires Karma 1As Saint
✔️DLC Rubicon Requires AttunementAs Saint
Information
Internal name
SB (Subterranean)
Subregions
Depths
Filtration System
Rooms (Screens)
❌DLC 56 (209)
✔️DLC 72 (257)
Shelters
❌DLC 7
✔️DLC 9
Points of Interest (Spoilers)
Dark Magenta Pearl (Subterranean)
Teal Pearl
1 Scavenger Merchant
Two Sprouts, Twelve Brackets

Subterranean is a late-game region that consists mostly of long, dim tunnels filled with dilapidated trains. It is the final region visited when following the intended path as any Slugcat. The dark pipes of Filtration System connect Subterranean to lower Drainage System and to the caves of the Depths .

Overview

Subterranean spans both sides of the world, connecting to Farm Arrays in the west and Shoreline in the far east. The western side of the region features a steep fissure and a pit overhang which are difficult to scale once Slugcat has dropped down. Subterranean is home to a large number of Centipedes, as well as Miros Birds that patrol the center of the map. Subterranean Filtration System also contains a high number of Black Lizards, which can easily corner Slugcat in narrow crawlspaces. A subterranean lake in the east of the region contains a unique albino Leviathan, as well as an albino Jetfish when playing as Hunter. Players with fully upgraded Karma can pass through the Depths .

Creatures

Subterranean Creatures
All

  • Centipede (Adult)

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  • Centipede (Overgrown)

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  • Black Lizard

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  • Centipede (Infant)

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  • Scavenger

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  • Monster Kelp

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  • Miros Bird

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  • Big Spider

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  • Salamander

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  • Blue Lizard

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  • Batfly

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  • Green Lizard

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  • Leviathan

  • Lineage

  • White Lizard

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  • Red Lizard

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  • Spitter Spider

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  • Red Centipede

  • Survivor

  • Dropwig

  • Hunter

  • Dropwig

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  • Spitter Spider

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  • Cyan Lizard

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  • Jetfish

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  • Red Centipede

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  • Eggbug

  • Objects
    All

  • Blue Fruit

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  • Mushroom

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  • Cherrybomb

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  • Bubble Fruit

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  • Flashbang

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  • Pearl

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  • Popcorn Plant

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  • Karma Flower*

  • * Karma Flowers do not appear as Hunter

    Points of Interest

    Gallery

    Subregions

    Filtration System

    Filtration System is a dark and dimly lit maze of pipes and shafts connected to Subterranean through four unique tunnels. The lack of illumination makes exploration challenging without a light source. The subregion is also inhabited by a large number of Black Lizards, which can easily corner Slugcat in narrow crawlspaces. Filtration System can also be accessed directly via Drainage System and serves as the only entrance to the Depths.

    SPOILER WARNING: Saint
    This section contains major plot details from Saint. If you have not made significant progress or completed the game as Saint, then read no further!


    In Saint's version, Filtration System is lit up with slow-moving lights identical to those in the Depths, and the lower rooms introduce a wavy effect identical to the cave rooms in the Depths. Void Spawn also appear in numerous amounts in these rooms.
    Spoilers end here.

    Depths

    SPOILER WARNING: Ending
    This section contains major plot details from the end of the game. If you have not yet completed the game on any difficulty, then read no further!


    The Depths is the deepest area in the game and can be accessed through a shaft at the bottom of Filtration System. There is no threat of Rain, and no creatures spawn aside from the Guardians to the west of the temple compound. There is no simple way to climb back up the entrance shaft.

    The upper area in the Depths contains a series of temple and shrine-like structures. In order to progress beyond this compound, the player must have unlocked the 10th Karma level, typically acquired by visiting Five Pebbles or visiting four Echoes. A small room near the entrance of Depths raises Slugcat's Karma to their current max level. Attempting to move past the Guardians without a maximum karma of 10 results in the Guardians throwing Slugcat back to the start of the room. Repeated attempts cause Slugcat to be flung heavily against the ground, resulting in death. Guardians have extremely high health pools and so cannot be killed conventionally.

    As the player progresses downwards, the compound gives way to a loose cave system which eventually opens out into a lake of golden dark liquid, known as the Void Sea. Slugcat cannot drown in this liquid, and swimming down into this lake begins the ending sequence.

    Spoilers end here.

    Downpour-Exclusive Content

    This section contains content exclusive to the Downpour DLC. This content is not available in the base game.
    SPOILER WARNING: Saint
    This section contains major plot details from Saint. If you have not made significant progress or completed the game as Saint, then read no further!


    In ✔️DLC Saint's campaign, the Depths is almost entirely missing, consumed by the Void Sea. Only the pipe leading to Filtration System and a single platform to stand on remain. The background is also mostly gone, replaced with a gold gradient as a background.

    Jumping off the platform before Saint reaches attunement causes Saint to loop around to the top of the room. Maneuvering to the side of the room loops Saint to the other side. If Saint has reached attunement, jumping off causes Saint to fall through a series of empty rooms with increasingly bright backgrounds. After the 1st empty room, Saint becomes perpetually stunned and cannot move. The screen eventually fades to white and a black 10th karma symbol fades in. After a short time, the background fades to black and the symbol fades to white at the same time, and the symbol then fades out. Saint falls into Rubicon at this point.

    Spoilers end here.

    Downpour-exclusive content ends here.


    Arena Mode Unlockables

    Location Unlockables
    Subterranean

    Arena unlock Maps Cave  •  Nest  •  Shortcuts
    ✔️DLC Filtration Node  •  Submerged
    Sandbox unlock Creatures Black Lizard  •  Overgrown Centipede
    Monster Kelp As Hunter, Gourmand, Artificer, Spearmaster
    Red Centipede As Hunter, Artificer, Spearmaster, Saint
    Sandbox unlock Objects Mushroom
    Safari unlock Regions ✔️DLC Subterranean

    Trivia

    • There are a few possible methods to scale the western fissure, most commonly Spears and a Grappling Worm or Explosives as well as starving and backflipping with a White Squidcada. It can also be consistently done as Saint or as Spearmaster.
    • It is possible, using TAS tools, to return to Filtration System after reaching the Depths.
    • In one of the western entrances to the Filtration System, rain does not flood the tunnels, allowing Slugcat to stay in one area indefinitely.
    • The shaft in the Filtration System serving as the entrance to the Depths only floods if the More Slugcats Expansion is disabled.
    • ✔️DLC Subterranean contains the Bonus Pearls, a uniquely-coloured pearl which is handled identically to a generic pearl.
    SPOILER WARNING: Ending
    This section contains major plot details from the end of the game. If you have not yet completed the game on any difficulty, then read no further!


    • There are multiple unintended ways to bypass the Guardians in Depths.
      • With good timing, it is possible to blind them with two Flashbangs for long enough to run past. This was specifically patched out for Hunter in version 1.5.
      • The Guardians can be bypassed by distracting them with a living creature. This works best with small living creatures such as Hazers or Vulture Grubs that can be swallowed and regurgitated repeatedly, aggravating the Guardians more quickly.
      • The exit can be reached by manipulating the Guardians to throw Slugcat straight upwards, then throwing objects to reach the pipe.
      • It is possible to fully despawn the Guardians by interrupting their room loading time. This is considered the simplest and fastest method of the Guardian despawn and is used for any% speedruns.
    Spoilers end here.

    Maps

    • Download all full sized .png visual maps here.

    Interactive Map

    Vanilla Subterranean Map by Henpemaz

    Downpour Subterranean Map ported by JuliaCat57

    Expedition

    Vista locations
    SB_D04 SB_E04 SB_H02