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Subnautica 2's multiplayer is peer-to-peer at Early Access launch, which means the world save lives on the host's PC and nowhere else. Here's how to back it up by hand, where to find the save folder on Windows, and how to restore it on a new host if the original machine dies.
May 15, 2026
Subnautica 2 is crossplay between PC and Xbox Series X|S, wired through Epic Online Services. Here's the actual invite flow for same-platform and cross-platform friends, plus the common reasons joins fail and how to fix them.
