The Pirate Captain Outfit in Assassin’s Creed Black Flag Resynced is a treasure-hunt reward and not a story unlock. You can simply get it by following a treasure map found in Corozal.
Once you collect that map, head to Ambergris Key, search the cave area at the marked location, and dig up the chest to claim the outfit plus some more rewards. The outfit is one of the better-looking rewards in Black Flag Resynced, and here’s how you can get it.
