Dive Together
Survive as a Crew
Subnautica 2 is the first mainline entry built for co-op from day one. Every confirmed detail on sessions, hosting, platforms and how a dive actually runs.
4
Max Players
✓
Drop-in / Drop-out
✓
Solo Supported
PC · Xbox
Platforms
Facts · 8 Confirmed
Multiplayer at a glance
Pulled from Unknown Worlds dev logs, Q&A sessions and the official Steam store page.
Player count
1 to 4 players per session
Co-op style
Drop-in, drop-out. Friends can join an in-progress save
Shared world
One seed, one map, shared bases and storage
Progression
Per-player inventory is implied by dev log footage. Unlock gating across crew members not yet detailed
Hosting
Player-hosted sessions shown in the Diving Together vlog. Dedicated servers not yet detailed
Crossplay
Not publicly confirmed. PC (Steam / Epic) and Xbox Series confirmed
Solo play
Fully playable solo. Co-op is optional, not required
Voice chat
Not specifically confirmed. Players may need to rely on Discord or platform party chat
Session · Loop
How a dive actually runs
The rhythm the devs describe: plan together, split underwater, rebuild the base as a crew.
Surface and plan
Meet at base, pool resources, pick the next biome to scout. The shared map surfaces what each player has discovered.
Dive as a team
Split into scout and support roles. Pilot the Tadpole together, or take separate propulsion devices to cover ground faster.
Build and repair
Modular base parts can be placed by any crew member. Fabrication and decoration is shared, not gated to the host.
Drop out, drop in
Players can leave mid-session and come back later with progress intact. The host can keep the save going solo.
Source · Dev Vlog
Diving Together walkthrough
Official video where the multiplayer rules above were shown on camera.
Subnautica 2 Dev Vlog - Diving Together in Multiplayer
The development team discusses all things co-op multiplayer in our fifth Subnautica 2 Dev Vlog.
Watch the full breakdown
FAQ · Quick Answers
What people actually ask
Six questions the community keeps hitting. Every answer sourced from official statements.
01Is Subnautica 2 multiplayer only?
No. Subnautica 2 is fully playable solo. Multiplayer co-op is an added layer, not a requirement.
02How many players can play together?
Up to four players per session. Unknown Worlds has confirmed this several times in dev logs and Q&A.
03Can I join a friend's game in progress?
Yes. Drop-in and drop-out co-op lets players join and leave an active session without starting over.
04Do all players need to own the game?
Yes. No free-friend pass has been announced. Each co-op player needs their own copy.
05Is there crossplay between PC and Xbox?
Not publicly confirmed. Both platforms are confirmed for Early Access but crossplay status is pending.
06Will there be dedicated servers?
Unknown Worlds has not detailed dedicated server support. Player-hosted co-op is confirmed for Early Access.