Here is the full list of all 7 Port of Call achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Choose to go with the Waiting Woman
Mix the wrong drink for the Drunkard.
Choose to go with the Ferryman
Collect all 4 of the passenger's tickets in one playthrough.
Pick up all 6 crayons on the ship in one playthrough.
Inspect all 6 paintings on the ship in one playthrough.
Board the Ferryman's ship.