Subnautica 2 Crossplay
Short answer
Subnautica 2 has full crossplay between Steam, Epic Games Store, the Xbox app on PC, and Xbox Series X|S consoles. PlayStation 5 is not supported in Early Access. All invites use a per-session Friend Code — there is no Steam-friends-list dependency.
Platform compatibility matrix
| Host | Guest | Supported | Notes |
|---|---|---|---|
| Steam (PC) | Steam (PC) | Yes | Default path. Most stable. |
| Steam (PC) | Epic (PC) | Yes | Friend Code works across launchers. |
| Steam (PC) | Xbox app (PC) | Yes | Game Pass / Xbox app PC fully supported. |
| Steam (PC) | Xbox Series X|S | Yes | Live in EA — confirmed by Switchblade, hebergtonserv tutorials. |
| Epic (PC) | Xbox Series X|S | Yes | Same Friend Code flow. |
| Xbox Series X|S | Steam / Epic | Yes | Invite from console works; PC must use Join Friends → paste code. |
| Xbox Series X|S | Xbox Series X|S | Yes | Standard Xbox Live multiplayer applies (Game Pass Core not required for crossplay invites). |
| PS5 | Any | No | PS5 build not available in EA. No ETA. |
| ROG Ally (Windows) | Any PC/Xbox | Yes | Treat as Windows PC; same Friend Code flow. |
Friend Code system
Subnautica 2 does not rely on platform friends lists for co-op. Every host generates a short alphanumeric Friend Code that's session-scoped: regenerated each time you start a new hosted session. Guests paste the code under Main Menu → Join Friends. This is what makes crossplay work — there is no account-linking step.
Game Pass + crossplay
Game Pass (PC or Console) does not change crossplay behavior. Game Pass PC = Xbox app on Windows = full crossplay with Steam/Epic/Xbox console. The only common failure is the Xbox app being out of date — make sure 'Subnautica 2 (Game Preview)' has finished updating before joining.
PS5 status
There is no PS5 build of Subnautica 2 in Early Access. Krafton has not announced a PS5 release date. All 'crossplay PS5 and PC' or 'crossplay PS5 and Xbox' queries currently resolve to not supported. Track the official roadmap for changes — when PS5 lands it will almost certainly join the same Friend Code system.
Crossplay invite fixes
- 1
Both sides on the same patch
Game Preview on Xbox sometimes lags Steam by a few hours after a hotfix. If a join fails on patch day, wait for the Xbox client to finish updating.
- 2
PC joining Xbox host: use Join Friends, not the system invite
Xbox's system-level Game Invite to a PC user does not always launch the right join flow. Have the Xbox host share the Friend Code via text, and the PC guest types it in the Join Friends screen.
- 3
Xbox joining PC host: open the game first
Don't accept the invite from the Xbox Home dashboard. Boot Subnautica 2 first, go to Join Friends, paste the code.
- 4
Generate a fresh code
If the code has been alive for >30 minutes or the host has disconnected/reconnected since, regenerate from the pause menu → Friends tab.
FAQ
Is Subnautica 2 cross-platform between PC and Xbox?
Yes — full crossplay between Steam, Epic, Xbox app on PC, and Xbox Series X|S.
Is Subnautica 2 crossplay between PS5 and PC?
No. PS5 is not supported in Early Access.
Does Game Pass support crossplay?
Yes. Game Pass PC and Game Pass on Xbox both use the same Friend Code system as Steam/Epic.