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