4-Player Co-op
Subnautica 2 Multiplayer Guide
Cross-play, drop-in/drop-out and practical launch-week roles for a four-player first session.
How 4-player co-op works
- Up to 4 Players — form a team of up to four Pioneers in any single-player save. Drop-in / drop-out, no separate multiplayer slot.
- Cross-Platform — Steam lists cross-platform multiplayer. PC and Xbox are the confirmed Early Access platforms. PlayStation and Switch are not supported — see platform availability.
- Group setup — plan host, voice chat and beacon naming before your first long session. Public matchmaking details should be checked in-game.
- Optional — the game is built single-player-first. No story or content is locked behind multiplayer.
Role Splits
The four roles a smooth team uses
| Role | Primary Job | Recommended Gear | Priority Unlock |
|---|---|---|---|
| Quartermaster | Stays near base, refines materials, monitors power and keeps spare food, water and oxygen ready. | Builder, repair tool, spare batteries | Stable first base |
| Gatherer | Runs short resource loops and feeds the Quartermaster a steady supply of basic materials. | Scanner, tank upgrade, beacon | Reliable resource loop |
| Scout | Pushes outward, drops beacons, records landmarks and confirms map markers. | Beacon stack, scanner, spare oxygen | Safe route outward |
| Biologist | Scans fauna and flora, tracks food and water, and warns the team before entering unknown ecosystems. | Scanner, food, water, first aid | Creature knowledge |
Trailer
See the team in action
Co-op risk patterns to watch
Treat these as launch-week safety habits until players confirm exact creature behavior:
Tight caves
Clustered players burn oxygen faster and block each other on exits. Send one scout in, keep the rest near the entrance, and mark the route with a beacon.
Resource noise
Four players strip a small area quickly and can lose their route home. Assign one player to beacon placement before everyone fans out.
Open deep water
Distant landmarks are already driving Reddit map speculation. Do not send the whole team toward an unconfirmed point until one scout has checked the return route.
Live now vs EA 1.2
What co-op is missing today - and what EA 1.2 adds
The current Early Access build is playable in 4-player co-op, but several quality-of-life co-op tools are still on the roadmap. Here is what you work around now versus what Unknown Worlds lists for the EA 1.2 Co-op Centric Update. See the full roadmap tracker for sequencing.
| Co-op need | Live now (workaround) | Planned in EA 1.2 |
|---|---|---|
| Voice communication | External app (Discord) - no in-game voice yet. | Voice Chat is a planned EA 1.2 addition. |
| Sharing items | Drop items manually or use shared base storage. | Player Trading is a planned EA 1.2 addition. |
| Reviving teammates | A downed player respawns at a Biobed - no field revive. | Player Revive is a planned EA 1.2 addition. |
| Coordination tools | Beacons and pinged landmarks. | HUD Signals, a Base Builder Tool and Pinned Recipes are planned EA 1.2 improvements. |
FAQ
Co-op questions players ask
How many players is Subnautica 2 co-op?
Up to 4 players. Any single-player save can be opened to a team of four Pioneers with drop-in / drop-out joining - there is no separate multiplayer slot, and no story or content is locked behind co-op.
Is Subnautica 2 cross-platform?
Yes. The Steam store lists cross-platform multiplayer, so PC players (Steam, Epic) and Xbox Series X|S players can share a session. PlayStation and Switch are not Early Access platforms, so they cannot join.
What does the EA 1.2 update add for co-op?
The roadmap's EA 1.2 Co-op Centric Update lists Voice Chat, Emotes, Player Trading and Player Revive as planned additions, plus HUD Signals, a Base Builder Tool and a Pinned Recipes system. None are live yet - until patch notes ship, plan voice, item sharing and revives manually.