By default, the developers (Beam Team Games) officially support: mode. 2-player Online Co-op (PC, PlayStation, and Xbox). 2-player Split-screen (PC).
: The game's balance (food, water, and island loot) is strictly designed for 1–2 players; a 4-player session would deplete islands nearly instantly. Future Outlook: Stranded Deep 2 stranded deep 4 player mod
"The Castaways' Quest"