Release
Corsair Cove multiplayer
Official store pages list Corsair Cove as single player only. There is no co-op settlement mode or PvP naval lobby at launch.
All colony management, Compass choices, and naval card fights run offline in your local save. Modded multiplayer would be unsupported and is outside this wiki scope. More detail on multiplayer.
If a future patch adds multiplayer, re-read the store description and patch notes before you plan a shared run with friends.