Subnautica 2 expands underwater exploration with four-player cooperative survival across an alien world

Subnautica 2 is an underwater survival adventure featuring an all-new alien planet, 4-player co-op, base construction, and deep oceanic exploration developed by Unknown Worlds.

Alien world narrative and colony expedition

• Following an ongoing interstellar conflict, Alterra transports human Pioneers aboard the colony vessel CICADA toward an unfamiliar aquatic world.
• When critical anomalies disrupt the colony voyage, the vessel's persistent artificial intelligence demands that surviving colonists continue their expedition.
• Stranded pioneers must adapt quickly to unfamiliar marine ecosystems while deciphering the planetary secrets concealed beneath dangerous oceanic waves.

Cooperative exploration and submersible vehicles

• Survivors can navigate the aquatic depths alone or assemble an online team of up to 4 players in cooperative multiplayer expeditions.
• The expedition introduces the maneuverable Tadpole submersible, enabling pilots to traverse deeper trenches and navigate hazardous submerged caverns safely.
• Divers scan native flora and fauna to catalog alien biodiversity, ranging from microscopic organisms to colossal predatory Leviathans.

Base building and gear fabrication

• Players construct modular habitat bases to secure breathable air, fabricate survival equipment, and store vital oceanic exploration supplies.
• Expanding specialized fabricator arrays unlocks advanced deep diving suits, environmental scanners, navigation beacons, and defensive depth sensors.
• Fortified base installations serve as safe staging grounds when launching long-distance diving operations into pitch-black oceanic abysses.

Early Access development and community feedback

• Developer Unknown Worlds designed the game from the ground up for collaborative evolution throughout its Early Access journey.
• Regular planned updates will introduce additional marine biomes, craftable gear recipes, exotic fauna, and expanded story chapters.
• Player feedback gathered from active community testing directly shapes environmental balancing, technical optimization, and core survival mechanics.