Subnautica 2 introduces multiplayer functionality, allowing players to explore underwater landscapes with up to three friends. The game maintains a design that ensures all single-player features are available in multiplayer without exclusive elements. Players can switch between single-player and multiplayer modes, converting existing saves or creating new ones. Friends can join a player's world but may be able to take resources. The game is fundamentally designed as a single-player experience, preserving moments of solitude. Subnautica 2 supports cross-play between Xbox and PC users, with a friends list system for connecting across platforms. Future expansions to other platforms are expected to maintain this cross-play capability. Players should check system requirements for compatibility.