Game finder
Subnautica 2
Early Access
Co-op check
verified on Oct 19, 2026
Play together
- Online
- up to 4
- Crossplay
- Full
Crossplay connections
- Xbox Series X|S ↔ Windows
Co-op verification sources
Subnautica 2 is an underwater survival adventure by Unknown Worlds. Explore an alien ocean, craft equipment, build bases and learn about the creatures in its biomes.
Four-player online exploration
Players can venture out alone or with up to three friends in online co-op. The official Steam listing also includes cross-platform multiplayer. Online platform compatibility applies to supported Windows and Xbox Series editions.
Early Access started May 14, 2026
The game entered Early Access on May 14, 2026. The developer warns that the game remains in active development, with more areas, creatures and features planned. Read the English Steam Early Access information before treating advertised future features as already present.
Up to four online, or solo.
May 14, 2026.
Steam lists cross-platform multiplayer for compatible Windows and Xbox Series editions.
No, it is still an Early Access game.