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. You can play with friends on PC and Xbox.
Co-op Overview
Max Players4 (solo + 3 friends)
Online Co-opConfirmed
Cross-platform Co-opDescribed by Xbox
Local Co-opNot confirmed
Co-op Overview
Subnautica 2 features online multiplayer co-op where you and your friends can explore the underwater world together. The co-op mode allows players to share the survival experience, collaborate on base building, explore together and divide labor for resource gathering and creature scanning.
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 designed to be fully playable solo. However, co-op adds a collaborative dimension where each player can take on different roles: exploration, base building, resource gathering, creature scanning and survival management. Playing with friends can make the survival experience more approachable and fun.
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. PC and Xbox players should be able to join the same co-op session. This means Steam users and Xbox console users can play together. For more details, see the crossplay page.
Co-op Tips After Launch
After Early Access launches, we recommend: establishing roles (explorer, builder, scanner), communicating about base locations, dividing resource gathering tasks, and using the beacon system to mark points of interest. Specific co-op strategies and tips will be updated as the community discovers them.
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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 functionality to be confirmed at launch.
Does Subnautica 2 support local co-op?
Local co-op support has not been confirmed. The confirmed multiplayer mode is online co-op.