The is not polished. It is not "official." You will encounter rubber-banding, inventory ghosts, and the occasional hard crash. However, the trade-off is worth it.
driver, are sometimes used to trick the game into recognizing multiple input devices for local co-op setups, though this is complex to install and primarily aimed at fixing controller conflicts rather than adding player slots. Why a 4-Player Mod is Rare Modding in Stranded Deep is more restrictive than in games like Engine Limitations stranded deep 4 player mod