Can play together
Steam + Xbox + Game Pass
All five storefront / platform combos share one matchmaking pool.
Cross-platform co-op
Subnautica 2 Crossplay
Who can play with whom, on which platforms, and what to settle before launch day so your 4-player group is not stuck on the lobby screen.
Yes, crossplay is in. Steam, Epic, Xbox Series X|S, Xbox on PC, ROG Xbox Ally, and Game Pass players all join the same 4-player online co-op session. No PS5, no Switch. Those platforms cannot connect at all.
Locked out
PS5 and Switch
No version exists. Friends on those platforms cannot join from a browser either.
Max group size
4 players
Hard cap. No 5-player or 6-player mode in current listings.
Every crossplay question, answered
Each phrasing people search for, with a direct answer.
Will Subnautica 2 have crossplay?
Yes. Subnautica 2 supports crossplay between Steam, Epic Games Store, Xbox Series X|S, Xbox on PC, ROG Xbox Ally, and Game Pass at Early Access launch on May 14, 2026. All five routes share one matchmaking pool.
Is Subnautica 2 cross-platform between PC and Xbox?
Yes. A PC player on Steam, Epic, Xbox on PC, or PC Game Pass can join a console player on Xbox Series X|S or ROG Xbox Ally in the same session. There is no PC-only or Xbox-only matchmaking gate.
Will Subnautica 2 have crossplay with PS5?
No. Subnautica 2 is not releasing on PS5 in Early Access, so PS5 players cannot join from any platform. Crossplay only covers the PC and Xbox ecosystem.
Is Subnautica 2 crossplay between Steam and Xbox?
Yes. Steam, Epic, Xbox Series X|S, Xbox on PC, and Game Pass players can all play together in the same 4-player session. This is the most common pairing fans ask about and it is confirmed.
Does Subnautica 2 have cross-save between Steam and Xbox?
Not confirmed. Unknown Worlds has announced crossplay but has not announced cross-save (carrying your save from one platform to another). Plan to pick one platform per save file at the start of Early Access.
How many players is Subnautica 2 crossplay?
Up to 4 players per session. The cap is the same regardless of which platforms the group is on.
Is Subnautica 2 cross-platform between Switch and PC?
No. Subnautica 2 is not on Switch at all in Early Access, so there is no Switch version to connect.
Crossplay vs cross-save: not the same thing
Crossplay (confirmed)
You and a friend on different platforms join the same session. One person hosts, the rest connect. This is what Subnautica 2 supports.
Cross-save (not confirmed)
Taking your save from Steam onto Xbox or vice versa. Unknown Worlds has not announced this. Plan to pick one platform per save file at the start.
Setting up a mixed group
Two practical bits worth knowing before launch:
- Pick a reliable host. Unknown Worlds has not detailed every save-hosting rule yet. Until the launch build proves otherwise, assume the safest host is the person most likely to be available for every session.
- Invite flow. Steam-to-Steam works through Steam friends. Cross-ecosystem invites usually need a friend code or account ID. Have everyone exchange theirs before launch night, not during.
Related co-op pages
Where to dig in next once your group is sorted.
Multiplayer Overview
Confirmed co-op player count, online play notes, and recommended session flow.
Game Pass Access
Game Preview, console, cloud, Xbox on PC, and PC Game Pass route.
Storefront Choice
Steam, Epic, Xbox, and subscription paths before purchase.
Steam Deck Status
Pre-launch tracker for Steam Deck Verified label and UE5 handheld expectations.