Multiplayer

Co-op, revives and inventory sharing

Use Buddy System features and diagnose the common mismatches.

Early Access 1.2 · Buddy System Hotfix 1, September 3 amendment · Updated 2026-09-12

The short answer

Buddy System adds proximity voice chat, direct item sharing and revival. Check everyone’s installed branch before diagnosing a connection or save problem.

Before you start

  • This guide covers the current Early Access 1.2 behaviour.
  • Never replace a working save with an older branch copy as a troubleshooting shortcut.

What your group can use

Voice chat supports cross-platform proximity audio, push-to-talk and an off option. A revival preserves the downed player’s equipment and restores a little oxygen; reprinting returns them to the assigned Biobed. Tracking Tags help recover portable lockers and black boxes.

Sources for this section

Check the specific limitation

ProblemCurrent rule or check
Trade unavailable in a TadpoleLeave the vehicle; sharing while riding is blocked.
Push-to-talk failed before the hotfixInstall the current hotfix and recheck the assigned input.
Attached rider did not receive oxygenThe hotfix addresses Tadpole and Haul replenishment.
Older branch will not load a saveSaves now record build and branch and reject incompatible older builds.
Sources for this section

Make a useful issue report

Record platform, build, branch, host/client role and the exact message. If the problem followed an update, test without incompatible mods after preserving the save. Share reproduction steps through the in-game feedback or official support route; Kingy does not submit reports on your behalf.

Sources for this section

Your checklist

0 of 3 ready · Stored only while this page is open.

Research checked 2026-09-12. This is a source-based guide; Kingy has not independently play-tested these steps. Evidence and coverage.

Independent fan guide. Subnautica 2 belongs to Unknown Worlds and KRAFTON. Kingy illustration; not game footage or a navigable map.