Here is the full list of all 32 Swords & Crossbones: An Epic Pirate Story achievements.
Visit all the islands in the archipelago.
Defeat Siegfried.
Complete the main quest line.
Defeat Croakatoa.
Invest in all possible islands to get tourists from them.
Defeat Duke A. Blizzardo.
Defeat Mortimer.
Complete all the side quests.
Knock out 50 sea monsters.
Defeat Carla.
Knock out 150 enemy pirates.
Knock out 150 land monsters.
Rescue all pirates and complete your crew.
Defeat Eddie Vulcan.
Defeat Fredo.
Knock out 20 soldiers of the Royal Navy.
Defeat Herman.
Defeat Josef.
Defeat Olivia.
Knock out 50 land monsters.
Knock out 50 enemy pirates.
Defeat Susan James.
Invest in tourism to get your first tourist to your island.
Knock out 15 sea monsters.
Defeat Admiral Iron Jaw.
Capture a monster and add it to your zoo or aquarium collection.
Knock out 5 sea monsters.
Use your ship to find and land on the nearest island.
Open a treasure chest and get what's inside.
Knock out 10 enemy pirates.
Knock out 10 land monsters.
Rescue a pirate to join your crew.