Subnautica 2 – Wiki Overview

Subnautica 2 is the third game in the Subnautica series and the direct successor to the 2018 original. This overview page summarizes the game's most important topic areas and points to the respective detail pages.

Subnautica 2 – Overview

Subnautica 2 is an open-world underwater survival adventure by Unknown Worlds Entertainment, released on May 14, 2026 as an Early Access title. It is the first entry in the series with native multiplayer and continues the story of the Subnautica universe on a completely new ocean planet. This wiki covers all relevant game mechanics, systems and content that are useful as a reference for AKMG members.

General Information

Story & Setting

The Alterra Corporation's colony transport CICADA unexpectedly leaves its course toward Zezura and crashes on an unknown ocean moon called Proteus. The survivors — referred to as Pioneers — have to hold their own against extreme environmental conditions, a hostile alien race (the Tailings) and a mysterious neurological illness called Masefield Syndrome. The ship AI NoA insists on continuing the original mission — and thereby drives the central plot of the game.

Gameplay Basics

The core gameplay loop of Subnautica 2 is based on the proven pillars of its predecessors: exploring, surviving and crafting. Newly added are co-op multiplayer and the Biomod system as a character progression layer. The game is primarily designed as a solo experience, yet built from the ground up with optional multiplayer.

Core Mechanics at a Glance

Co-op & Multiplayer

Subnautica 2 is the first game in the series with native multiplayer. Up to 4 players can explore together — optionally with a drop-in/drop-out system. Crossplay between PC (Steam, Epic, Windows Store) and Xbox Series X|S is fully supported.

Important co-op details:

Biomod System

The Biomod system replaces a classic skill tree system with genetic modifications that are gained by scanning alien lifeforms. There are two types:

Advanced Biomods require the Bioscanner — a mid-game tool that is crafted at a Modification Station. At the Early Access launch, 5 active and 10 passive Biomods can be unlocked.

Vehicles & Equipment

The main vehicle at the Early Access launch is the Tadpole — a compact submarine that can dock and deploy smaller sub-drones. Further vehicles and equipment will be added over the course of Early Access.

Base Building

The building system has been fundamentally reworked. Instead of rigid construction kit modules, a procedural system allows walls, corridors and windows to be drawn freely. The number of bases you can build is not limited.

Biomes & World

Proteus offers a range of biomes — from shallow, brightly lit coral areas (the Shallows) all the way to deep cave systems and the Karakorum zone with ancient alien ruins. At the Early Access launch, story chapters 1–3 are playable; further biomes and chapters will follow by update.

Creatures & Leviathans

The fauna of Proteus ranges from small scan targets such as the Water Slug up to massive leviathan-class creatures (for example the Collector Leviathan and the Shiver Leviathan). Leviathans react to movement, surroundings and other animals — no fixed patrol patterns. They are also scan targets for powerful Biomods.

Crafting & Resources

Crafting follows the familiar scheme: gather resources → scan blueprints → build items. Titanium Ingots cannot be produced in the standard Fabricator — a Processor base module is needed for that first. All crafted recipes are shared with every player in co-op.

Early Access Roadmap

Unknown Worlds is planning regular content updates during the roughly two- to three-year Early Access phase:

System Requirements

The game runs under Windows 10/11 (64-bit) and requires a DirectX 12-capable GPU. Four PC performance tiers are defined (Minimum, Recommended, Ultra, Ultra++). Steam Deck and ROG Ally are officially supported. The storage requirement is about 50 GB.

New here? Getting started with the first hours

Anyone who has only just arrived on Proteus will find the first hours in a sensible order on the page Subnautica 2 beginners: guide for the first hours — digestion block, scanning order, first base.

Anyone whose first base is standing will find the next stage under Subnautica 2 advanced tips — adaptations, the DNA system, Tadpole modules and depth progression.