Here is the full list of all 44 Shantae and the Pirate's Curse achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Defeat the Pirate Master's true form and save Scuttle Town in record time!
Saved Scuttle Town as fast as possible!
Play keep away with the Ammo Baron.
Defeated Dagron without taking damage.
Discover the secret Labyrinth.
Defeated the Squid Baron without taking damage.
Defeated the Pirate Master without taking damage.
Defeated the Empress Spider without taking damage.
Get Rottytops to Abner Tree without making any mistakes in a single attempt.
Destroy 20 bones with the Bubble Shield.
Defeated the Cyclops Plant without taking damage.
Defeated the Cyclops Plant using only Pike Balls.
Defeated the Ammo Baron without taking any damage.
Complete the game without any Health upgrades and all Heart Squids collected.
Defeated the Steel Maggot without taking damage.
Collect all Heart Squids.
Defeat the Pirate Master's true form.
Collect all of the Dark Magic.
Defeated the Pirate Master.
Complete the hidden training room.
Defeated the Steel Maggot.
Sample the entire menu!
Collect all Labyrinth maps.
Help Ammo Baron fire the Palace Disruptor Cannon.
Obtain the Spirit from Abner.
Collect the Enchanted Blade.
Defeat 50 enemies using Pirate Weapons.
Defeated Dagron.
Obtain Manly Musk.
Collect 50% of the Dark Magic.
Collect 50% of the Heart Squids.
Obtain the Fossil.
Defeated the Squid Baron.
Obtain the Golden Pickaxe.
Obtain all three Mummy Sketches.
Use a Pirate Flare to return to Risky's ship.
Defeated the Empress Spider.
Destroy 10 Spider Eggs before they hatch.
Obtain Squid Oil.
Defeated the Cyclops Plant.
Defeat 250 enemies using Shantae's Monster Whipper!
Release the Ham Stink.
Defeated the Ammo Baron.
Defeated the Pirate Master's true form without taking any damage.