Subnautica 2

Subnautica 2 plunges players into the depths of an alien ocean world where survival depends on exploration, resource management, and base building. As the sole survivor (or part of a four-player co-op crew) of the Aurora-class vessel crash, you must navigate treacherous underwater biomes, scan alien flora and fauna, and uncover the mysteries of a long-lost Precursor civilization. The game launches in Early Access with a substantial portion of the planned map and a roadmap of content updates leading toward a full 1.0 release in 2028.

Underwater survival and exploration

The core loop of Subnautica 2 revolves around managing oxygen, hunger, and hydration while pushing deeper into progressively more dangerous biomes. From the sun-drenched Safe Shallows to the pitch-black Deep Zones, each region introduces new resources to harvest, creatures to evade or study, and environmental hazards to overcome. Unlike its predecessors, Subnautica 2 features a seamlessly connected ocean world with no loading screens between biomes, creating an immersive sense of scale as you descend from the surface to the ocean floor.

Base building and habitat management

Subnautica 2 expands base building with new modular room types, automated greenhouse modules, and a unified power relay system that lets you connect multiple energy sources across disconnected base sections. Build observatory domes for creature watching, scanner rooms to map nearby resources, and moonpools for vehicle docking. Hull integrity, power management, and creature defense systems — including the new perimeter defense grid and auto-repair drones — make base placement a strategic decision. Thermal vents, solar panels, bioreactors, and nuclear generators offer diverse power options depending on depth and biome.

Creatures of the alien ocean

The ocean of Subnautica 2 teems with alien life, from harmless herbivores like the Paddlefish and Glowcrab to apex predators including the new Shadow Leviathan and returning Reaper Leviathan. Each creature follows a unique behavioral pattern — some are territorial, others are attracted to light or sound. The scanner lets you document each species for your databank, revealing habitat preferences, diet, and whether they can be farmed in alien containment. Leviathan-class creatures serve as both environmental threats and puzzle-like obstacles, often guarding entrance points to deeper biomes.

Four-player co-op multiplayer

A defining new feature of Subnautica 2 is native four-player co-op support. Up to four players can explore, build, and survive together in the same persistent world. Resources are instanced per player but blueprints and story progression are shared across the party. Players can divide roles — one focuses on base expansion while another scouts for rare materials or scans leviathan behaviors. The host's world persists between sessions, and guest players retain their unlocked blueprints when joining other hosts. Cross-platform play between Xbox and Windows is supported within the Microsoft ecosystem, and Steam co-op uses the friend invite system.

Explore our Guides hub for detailed tutorials on base locations, vehicles, and gameplay mechanics. Visit the Features section for in-depth dives on biomes, creatures, and vehicle upgrades. Check Updates for the latest Early Access patch notes and roadmap announcements.