Subnautica 2 is the first mainline entry built for co-op from day one. 4-player drop-in, cross-platform sessions, with every confirmed detail on hosting and platforms.
Featured
The dev vlog where multiplayer rules and pacing were shown on camera.
Feb 10, 2026 · 4:27
Spec · 8 confirmed
Pulled from Unknown Worlds dev logs, Q&A sessions and the Steam store page.
Players
1 to 4 per session
Style
Drop-in, drop-out. Friends can join an in-progress save
World
One seed, one map, shared bases and storage
Progression
Per-player inventory implied by dev log footage. Unlock gating not detailed
Hosting
Player-hosted. Dedicated server option not detailed
Crossplay
Not publicly confirmed. PC and Xbox Series both confirmed
Solo
Fully playable solo. Co-op is optional
Voice
Not confirmed. Use Discord or platform party chat
Answers
No. Subnautica 2 is fully playable solo. Co-op is optional.
Up to four players per session, confirmed by Unknown Worlds.
Yes. Drop-in and drop-out co-op lets players join and leave an active session without restart.
Yes. No free-friend pass has been announced.
Not publicly confirmed. Both platforms are confirmed for Early Access but crossplay status is pending.
Unknown Worlds has not detailed dedicated server support. Player-hosted co-op is confirmed for Early Access.