Bring the crew. Sea Drifter's voyage is a shared one now — up to four captains, one ocean, one ship's ledger.
Sail as a fleet — every captain steers their own hull, works their own guns, watches their own hull bar. The sea, the islands, the pirates and the bosses are shared.
Play with Steam friends — host an online game and invite from your friends list, or let them hit "Join Game". No IP addresses, no port forwarding — Steam relays it.
One shared ledger — a single gold pool, a single cargo hold, one keel-refit and outfitting track. Every coin and every plank you haul in builds the same ship.
Kill bosses together — gang up on the Pirate King, the Warlord, the Drowned Court. Every hull's fire counts; the kill and the reward go to the whole fleet.
Chart and claim together — scout islands, run expeditions, break strongholds, dig up treasure. Fog you reveal fills in everyone's chart.
Drop in, drop out — the host carries the world and the save; friends come and go and the voyage sails on.
One player hosts a listen server — their save is the co-op campaign. Everyone else joins as a thin client that mirrors the shared world. A direct LAN / IP option is there too, for local play or testing.
Co-op is fresh and still pre-alpha — expect rough edges, and please report anything odd. Single-player is untouched. Weigh anchor, captain. Fair winds — for all of you.