Currently, does not officially support 3-player gameplay; the game's multiplayer is strictly capped at two players for both online and local split-screen modes. Despite heavy community demand for 4-player support, there is no widely available or stable "3-player mod" that increases the player count beyond this limit. Current Multiplayer Limitations
Stranded Deep ’s tension hinges on scarcity. With three mouths to feed and hydrate, you’d expect increased pressure, but in practice, three players can cover more ground faster, making resource scarcity almost trivial. The only real challenge becomes finding enough clay and potatoes for fuel. stranded deep 3 player mod
For a look at the extensive mods available that change gameplay—though not player count—check out this overview: Desync: A friend sees a coconut on the
Currently only supports single-player gameplay. one player sharpens tools
Since sleeping teleports you to the host's shelter, do not wander far at dusk. Use the three-player count to work through the night: One player cooks, one player sharpens tools, one player watches for sharks.