Is Subnautica 2 Crossplay? PC and Xbox, Yes โ PS5, No
The short answer: yes, Subnautica 2 supports crossplay โ but only between the platforms it actually launched on. Since the May 14, 2026 Early Access launch, players on PC (Steam, Epic Games Store, and the Windows Store) and Xbox Series X|S can play together in the same 4-player co-op session, and that includes Xbox on PC, the ROG Xbox Ally, and anyone playing through Game Pass. There is no PlayStation 5 version of Subnautica 2, so PS5 players cannot join from any platform.
If you only have 30 seconds: Subnautica 2 co-op is peer-hosted โ one player opens their save, becomes the host, and up to three friends join that session through an invite. It works fine across PC and Xbox, but the world only exists while the host is online. If you want the world available to the whole crew around the clock, a managed always-online host keeps it running without anyone having to leave their PC or console on. Full breakdown below.
Crossplay Overview
Subnautica 2 supports crossplay across its launch platforms: PC (Steam, Epic Games Store, Windows Store), Xbox Series X|S, Xbox on PC, the ROG Xbox Ally, and Game Pass. A PC player and an Xbox player can dive the same world together with no extra setup beyond a friend invite. PlayStation and Nintendo are not supported in Early Access โ the original Subnautica reached those platforms long after its PC debut, but there is no announced timeline for Subnautica 2.
Which Platforms Can Play Together?
| Platform | Available? | Crossplay with PC/Xbox? |
|---|---|---|
| PC โ Steam | Yes | Yes |
| PC โ Epic Games Store | Yes | Yes |
| PC โ Windows Store / Game Pass for PC | Yes | Yes |
| Xbox Series X|S | Yes | Yes |
| Xbox on PC / ROG Xbox Ally | Yes | Yes |
| PlayStation 5 | No version | Cannot join |
| Nintendo Switch / Switch 2 | No version | Cannot join |
Because the game is on Game Pass, a friend can try it through their subscription on either PC or Xbox and still join your party โ they do not need to own a separate copy on each store.
How Subnautica 2 Co-op Actually Works
Subnautica 2 ships with online co-op for up to four players. It is drop-in, drop-out, and it is peer-hosted rather than running on a separate server:
- One player hosts. The host opens their own save file and the world loads on their machine. Everything that happens lives in that host's save.
- Friends join the host. Other players connect to the host's session through an in-game invite or friends list โ there is no server IP or port to type in.
- The host has to be online. When the host quits or loses connection, the session ends for everyone, and progress is tied to the host's save.
Why this matters for groups: peer hosting is simple for a quick session, but it has two weak spots โ the world is only available when one specific person is online, and if that person's save corrupts or their machine dies, the world goes with it. That is the single most common frustration co-op crews hit after the first week.
Inviting Cross-Platform Friends
- The host loads the save they want to play and opens it to co-op from the in-game menu.
- The host opens the friends / invite menu and sends an invite to friends on either PC or Xbox.
- Friends accept the invite to drop straight into the host's world โ no IP address, password, or port forwarding required.
- Up to three friends can be connected at once for a four-player total.
Cross-platform invites between PC and Xbox use the in-game friends system, so a Steam player and an Xbox player can party up directly. If you cannot see a friend, make sure both of you are on the same game version after any Early Access patch โ a version mismatch is the most common reason an invite fails to connect.
Keeping the World Online 24/7 (Managed Hosting)
Peer hosting is fine when everyone plays at the same time. If your group plays on different schedules, the "host must be online" limitation becomes the bottleneck โ nobody can hop in to build or explore unless the original host is also playing.
The fix is to run the world on a managed, always-online host instead of one person's PC. The crew connects to a session that is up around the clock, the world persists between play sessions, and daily backups protect the save if something goes wrong. It removes the "the host left, so we're done" problem without anyone needing to leave a console or gaming PC running.
Always available
The world stays up whether or not the original host is online, so anyone in the group can jump in on their own schedule.
Daily backups
Automatic backups mean a corrupted save or a bad patch does not wipe weeks of progress.
Stable for everyone
Performance no longer depends on one player's home connection and hardware.
Input and Control Across Platforms
Controller support
Both PC and Xbox support controllers, and PC players can switch between controller and mouse and keyboard freely.
Mouse & keyboard
A PC advantage for precise base building and inventory work. Subnautica 2 is co-op survival, not competitive, so input differences are a comfort choice, not a balance issue.
Button prompts
On-screen prompts switch automatically to match whichever controller or input you are using.
Troubleshooting Crossplay and Co-op
| Problem | Likely cause | Fix |
|---|---|---|
| Can't see friend's invite | Different game version after a patch | Update so both players are on the same Early Access build, then retry |
| Invite fails to connect | Host's NAT / connection, or host went offline | Confirm the host is still in the session; the host with the most reliable connection should host |
| PS5 friend can't join | No PlayStation version exists | There is no workaround โ Subnautica 2 is PC and Xbox only in Early Access |
| World unavailable when friend is offline | Peer hosting ties the world to the host | Move the save to an always-online managed host so it stays up for everyone |
| High latency for some players | Host located far from other players | Host from the most central location, or use a hosted session in a region close to the group |
Frequently Asked Questions
Is Subnautica 2 cross-platform?
Yes, between PC (Steam, Epic, Windows Store) and Xbox Series X|S, including Game Pass on both. PC and Xbox players share the same co-op sessions.
Is Subnautica 2 on PS5?
No. There is no PlayStation 5 version at Early Access launch, so PS5 players cannot play or join, on any platform.
How many players is Subnautica 2 co-op?
Up to four players in drop-in, drop-out online co-op.
Does Subnautica 2 have dedicated servers?
There is no official dedicated-server tool from Unknown Worlds โ co-op is peer-hosted, so one player hosts and friends join. Managed hosting providers run an always-online session on your behalf to keep the world up when the host is offline.
Is Subnautica 2 crossplay on Game Pass?
Yes. Game Pass players on PC or Xbox can join the same crossplay sessions as Steam and Epic players.
Pro Tip: Decide who hosts before you start a long-term world. Since the world lives on the host's save, the most reliable approach for a group that plays on different schedules is an always-online managed host with daily backups. Running another co-op survival game too? Supercraft also hosts a managed Palworld dedicated server, online 24/7 with crossplay and backups.
Building cross-platform co-op yourself? If you are a game developer designing your own account-link and cross-platform session system, our sister project Supercraft GSB has a write-up of the patterns behind it: Cross-progression and cross-save backend patterns.