Native co-op
Play online with friends from the game itself; no mod or crack is required.
Co-op hub
Subnautica 2 Co-op
Start here for multiplayer setup, crossplay support, Friend Code fallback, and the no-patch answer for co-op searches.
Start here
Co-op guides
Use these pages when you want to host, join, check platform support, or troubleshoot a failed session.
Quick answer
No multiplayer patch needed
Subnautica 2 supports native online co-op in Early Access. Use the official in-game multiplayer flow instead of downloading third-party patch files.
Crossplay checks
Confirm supported storefronts and platform limits before planning a session.
Connection fixes
Check build version, host status, Friend Code, NAT, UPnP and firewall settings.
FAQ
Co-op questions
Does Subnautica 2 need a co-op patch?
No. Subnautica 2 has native online co-op, so avoid third-party patch or mod downloads.
How many players can join?
Up to four players total can play together in an online co-op session.
Where should I start?
Start with the co-op setup guide for platform support, hosting, joining friends and connection checks.