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.
Saved Scuttle Town as fast as possible!
Defeat the Pirate Master's true form and save Scuttle Town in record time!
Complete the game without any Health upgrades and all Heart Squids collected.
Play keep away with the Ammo Baron.
Defeated the Empress Spider without taking damage.
Get Rottytops to Abner Tree without making any mistakes in a single attempt.
Defeated the Cyclops Plant using only Pike Balls.
Defeated the Cyclops Plant without taking damage.
Defeated the Ammo Baron without taking any damage.
Defeat the Pirate Master's true form.
Defeated the Pirate Master's true form without taking any damage.
Complete the hidden training room.
Destroy 20 bones with the Bubble Shield.
Discover the secret Labyrinth.
Sample the entire menu!
Collect all Heart Squids.
Collect all of the Dark Magic.
Defeated the Pirate Master.
Defeated the Pirate Master without taking damage.
Defeated the Steel Maggot.
Defeated the Steel Maggot without taking damage.
Collect all Labyrinth maps.
Help Ammo Baron fire the Palace Disruptor Cannon.
Obtain the Spirit from Abner.
Collect the Enchanted Blade.
Defeated Dagron.
Defeated Dagron without taking damage.
Collect 50% of the Heart Squids.
Obtain Manly Musk.
Obtain the Fossil.
Collect 50% of the Dark Magic.
Defeated the Squid Baron.
Defeated the Squid Baron without taking damage.
Defeat 50 enemies using Pirate Weapons.
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.
Defeat 250 enemies using Shantae's Monster Whipper!
Obtain Squid Oil.
Defeated the Cyclops Plant.
Release the Ham Stink.
Defeated the Ammo Baron.