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