Subnautica 2 Co-op
Subnautica 2 can be played solo or in online co-op with up to three friends, for a total of up to four players.
Last updated: May 2026
Co-op Confirmed
Subnautica 2 supports solo play and online co-op with up to four players. Exact cross-platform pairings should still be checked in the live Early Access build.
Co-op Overview
Max Players
4 (solo + 3 friends)Online Co-op
ConfirmedCross-platform Co-op
Described by XboxLocal Co-op
Not confirmedCo-op Overview
Subnautica 2 lets you explore the underwater world solo or with friends in online co-op. In a group, players can split jobs such as scanning, gathering resources, building bases and watching for threats.
How Many Players Can Play?
Subnautica 2 supports a maximum of four players in co-op mode. This includes the host (who can play solo) plus up to three additional players, for a total of four concurrent players in a session.
Solo vs Co-op
Subnautica 2 is fully playable solo. Co-op changes the pace: resource gathering is faster, dangerous trips are less lonely, and base building can be shared, but communication matters more.
Playing with Friends
To play co-op, the host starts a multiplayer session and invites friends. You can invite through Xbox Live, Steam friends or the game's built-in friend system depending on the platform. Once friends join, you can explore, build bases and survive together in the underwater world.
Crossplay
Subnautica 2 supports cross-platform play according to Xbox's description, and Steam lists Cross-Platform Multiplayer. Exact platform pairings should be checked in the live Early Access build. For more details, see the crossplay page.
Co-op Tips
In Early Access co-op, establish roles (explorer, builder, scanner), communicate about base locations, divide resource gathering tasks, and use beacon markers to track points of interest. Specific co-op strategies may change as players document more of the live build.
Frequently Asked Questions
Does Subnautica 2 have co-op?
Yes. Subnautica 2 supports online co-op with up to four players.
How many players can play Subnautica 2 co-op?
Subnautica 2 supports up to four players total (solo + 3 friends) in co-op mode.
Can I play Subnautica 2 solo?
Yes. Subnautica 2 is fully playable solo. Solo mode is the default when you start the game without joining a multiplayer session.
Can PC and Xbox players play together?
According to Xbox, PC and Xbox players should be able to play together via crossplay. Exact platform-pair behavior should be checked in the live build.
Does Subnautica 2 support local co-op?
Local co-op support has not been confirmed. The confirmed multiplayer mode is online co-op.
Related Guides
References: Xbox Wire announcement