Subnautica 2 guide hub
Early Access 1.1 reviewedRegion-first field guide

Regions, hazards, and base planning

Subnautica 2
Biomes Guide

Read each region by what it provides, what it demands, and which landmark should guide the next leg of your expedition.

Navigation anchorLifepod + signals
Deepest routeRoot Canyon
Base strategyTwo regional hubs

Regional overview

Think in regions before individual biomes

The current world forms a broad west-to-east expedition: build capability in Coral Gardens, survive the exposed Sparse Plains, then use Karakorum Ruins as the advanced objective region.
01Opening region

Coral Gardens

The Lifepod, Welcome Center, first wrecks, Silver routes, heat progression, and Tadpole infrastructure all sit within this broad starting ecosystem.

Shallows → Plateaus → Graveyard
02Transition region

Sparse Plains

Open terrain and limited cover separate the safer starting region from the ruins. The Collector turns this crossing into a preparation check.

Graveyard → rock-cover crossing → Ruins
03Advanced region

Karakorum Ruins

The Observatory, Power Plant, Metal Farms, deep wrecks, rare resources, and the current story culmination occupy this far-reaching ruin complex.

Overgrown Ruins → Power Plant → Root Canyon
Adaptive Measures changed regional value.Early Access 1.1 added Biolabs in Coral Gardens and Axum Ruins, improved wreck traversal, adjusted Silver availability in Coral Gardens, and rebalanced Bloom encounters along the main route.

Representative destinations

What each major biome contributes

This field guide focuses on the destinations that meaningfully change equipment, materials, story access, or base strategy. Smaller connective zones still matter for navigation.
Coral Gardens · 0–224 m

Shallows

Bright coral terrain, caves, and the densest concentration of opening survival resources.

Resources
Titanium · Copper · Quartz · Fibrous Pulp · Water Slugs
Landmarks
Lifepod · Welcome Center · Anita's Garden
Prepare
No special protection; improve oxygen before deep caves.
Craft the first tools, power the Welcome Center, unlock early Biomods, and learn the local route network.
Coral Gardens · 23–119 m

Plateaus

Layered formations, ravines, currents, abandoned facilities, and productive early mineral caves.

Resources
Silver · Copper · Quartz · Titanium · Cherimoya Rotsac
Landmarks
Camp One · Old Habitat · Sophie's Retreat
Prepare
Fins, upgraded air, and a visible return signal.
Secure Silver, scan major infrastructure, and establish the strongest all-purpose first base.
Coral Gardens · 0–100 m

Necrolei Hills

Glowing growths, rolling terrain, wreckage, and distinctive nighttime visibility.

Resources
Necrolei Cyst · Silver · Copper · Quartz · Acidic Raion Pouches
Landmarks
Hills wrecks · Plateaus boundary · Necrolei caves
Prepare
Survival Multitool and a light for dense growth.
Harvest acid-chain materials and scout one of the most visually distinctive habitat locations.
Coral Gardens · 34–65 m

Lead Zone

A compact current-fed cave network with concentrated Lead and a technology-rich wreck.

Resources
Lead · Quartz · Copper · Titanium
Landmarks
Lander Garage wreck · current tunnels
Prepare
Sonic Resonator for bulk deposits; preserve the exit bearing.
Stockpile Lead and scan the Rebreather, Tadpole, Processor, Bioreactor, and base-room technology.
Coral Gardens · 0–128 m

Dolerite Spires

Sparse spires and wreck routes surrounding the enormous Great Jaw encounter.

Resources
Lithium · Silver · Titanium · Quartz · Copper
Landmarks
Quaker's Meetinghouse · Canteen wreck · Spires wrecks
Prepare
Mobility, upgraded oxygen, and strict distance from the Great Jaw's center.
Collect early Lithium, permanent upgrades, and useful wreck technology without crossing the central trap.
Coral Gardens · 0–266 m

Graveyard

A volcanic landscape of red water, coral remains, deep caves, wreckage, and thermal energy.

Resources
Gold · Sulfur · Salt · Quartz · Copper · Titanium
Landmarks
Tailings Village · Tadpole Pens · Empty Hold · Hot Cave Basecamp
Prepare
Heat Tolerance, Tadpole, Rebreather, and deeper oxygen support.
Build the Tadpole, gather mid-game metals, progress major objectives, and exploit thermal power.
Transition · 0–250 m

Sparse Plains

An exposed crossing with scattered formations, limited protection, and a roaming Collector Leviathan.

Resources
Celestine · Salt · Titanium · Copper · Quartz
Landmarks
Collector territory · rock-cover route · Dragon's Scale Coral
Prepare
Fast Tadpole, repaired hull, spare power, healing, and a committed heading.
Cross to Karakorum. Gather only when the Collector's position and an escape line are both known.
Karakorum Ruins · 0–600 m

Overgrown Ruins

Monumental Axum architecture surrounded by red terrain, gateway structures, caves, and deep vertical routes.

Resources
Lead · Salt · Titanium · Copper · Quartz · Freesia Flower
Landmarks
Axum Observatory · Rosetta Stone · Research Outpost
Prepare
Tadpole and a Depth Module for lower deposits and structure routes.
Create an advanced staging base, unlock major technology, and prepare the Power Plant objective chain.
Karakorum Ruins · 0–500 m

Karakorum Metal Farms

Ancient production infrastructure, hostile deep fauna, bacterial systems, and scarce fabrication inputs.

Resources
Troilite · Atacamite · Axum Bacterial Culture · Celestine
Landmarks
Metal Farms · deep Axum structures · Collector territory
Prepare
Depth Module, Repair Tool, advanced defenses, and spare batteries.
Acquire and reproduce rare materials needed for advanced repairs and current endgame construction.
Karakorum Ruins · 364–750 m

Root Canyon

A very deep canyon beneath the ruin network with vertical roots, wrecks, and late-game resource routes.

Resources
Celestine · Atacamite · Silver · Gold · Sulfur · Salt
Landmarks
Therapy Room wreck · Stairway to Heaven wreck · lower controls
Prepare
Depth Module, Rebreather, repair supplies, and a disciplined power budget.
Reach deep wrecks and Power Plant infrastructure while collecting advanced materials near the current depth limit.

Recommended order

Progress through the map in six expeditions

New materials and tools appear close to the routes that first demand them. Finish the preparation objective before treating the next region as routine territory.
01

Stabilize the Shallows

Craft core tools, improve oxygen, power the Welcome Center, and establish a return-bearing habit.

02

Work the Plateaus

Gather Silver, inspect Old Habitat, and unlock the infrastructure for a practical first base.

03

Prepare for heat

Resolve the Bloom route, obtain Heat Tolerance, and gather supplies for volcanic exploration.

04

Open the Graveyard

Build the Tadpole, scan vehicle infrastructure, and collect Gold, Sulfur, and Salt.

05

Cross Sparse Plains

Repair first, use solid cover, keep moving, and do not turn the crossing into a farming run.

06

Stage from the Ruins

Set up near the Observatory, then descend toward the Power Plant, Metal Farms, and Root Canyon.

Habitat planning

Choose a base for its job

A strong campaign usually needs one dependable Coral Gardens base and one advanced Ruins hub. Specialist outposts only need enough power, storage, oxygen, and safety to support their route.
01Safest starter

Shallows

Close to the Lifepod, water, food, common resources, and the Welcome Center.

02Best first base

Plateaus

Excellent Silver access, useful technology, central routes, and enough space to expand.

03Most scenic

Necrolei Hills

Glowing terrain and strong early resource access without committing to deep hazards.

04Thermal outpost

Graveyard

Reliable heat power and mid-game metals, balanced against heat and predator risk.

05Advanced hub

Overgrown Ruins

The best staging position for the Observatory, Power Plant, wrecks, and deep routes.

06Specialist outpost

Lead Zone

A compact supply base when bulk Lead and nearby wreck technology are the priority.

Recommended network

Plateaus base + Overgrown Ruins hub

The first handles common fabrication and shallow gathering. The second shortens every Power Plant, Observatory, Metal Farm, and deep-wreck expedition.
Base-building guide

Environmental gates

Do not solve equipment checks with extra healing

Heat, pressure, oxygen, and Leviathan exposure are route gates. The correct upgrade changes the expedition more than carrying another stack of recovery items.
Depth and oxygen

Deep caves and Root Canyon

Upgrade the Tadpole depth limit, wear the Rebreather, and preserve tool power for repairs and emergency ascent.

Environmental heat

Graveyard routes

Obtain Heat Tolerance before committing to red-water caves and volcanic resource runs.

Open-water predator

Sparse Plains crossing

Repair before departure, use rock formations as cover, maintain speed, and avoid stopping to gather mid-crossing.

Axum objectives

Power Plant network

Bring the Bioscanner, Feedback Resonator, processed materials, and enough cargo capacity for multi-stage repairs.

World boundary

The Void is a warning, not a destination

Red boundary feedback and Shiver Leviathans mark the edge of the current playable world. There are no resource or story rewards worth continuing into it.
Turn around when:
  • Red boundary lines appear
  • The terrain falls away without landmarks
  • Shiver Leviathans begin enforcing the edge
Biome names remain version-sensitive.Some labels come from current map and community reference data rather than a large on-screen biome banner. Navigate with region, depth, structure names, and signals together.

Route selected

Prepare the materials for the next region

Use the Resources guide to plan the haul, or review Creatures before entering a biome with unfamiliar predators.