The Waterborne Add-on for Tropico 5 has 10 achievements.
Defeat Captain Plant in the final battle
Complete Waterborne campaign
Finish the Waterborne campaign with the Black Pearl in your possession
Have 3 Oyster Farms and a Jewelry Workshop
Have 5 superpowers in Offshore Offices
Have 1 of each waterborne buildings in a single playthrough
Have 10 Floating Apartments and no residential buildings on land (excluding shacks)
Complete "Treasure Hunt"
Have a fleet of 3 Fishing Trawlers
Fire missiles from a Nuclear Submarine during a battle against another player