Here is the full list of all 44 Shantae and the Pirate's Curse achievements worth 1,000 gamerscore.
Defeat the Pirate Master's true form.
Defeated the Pirate Master.
Defeated the Pirate Master without taking damage.
Collect all Dark Magic.
Collect all Heart Squids.
Destroy 20 bones with the Bubble Shield.
Complete the hidden training room.
Discover the secret Labyrinth.
Defeated the Steel Maggot.
Defeated the Steel Maggot without taking damage.
Collect all Labyrinth maps.
Help Ammo Baron fire the Palace Disruptor Cannon.
Collect the Enchanted Blade.
Play keep away with the Ammo Baron.
Obtain the Spirit from Abner.
Defeated Dagron.
Defeated Dagron without taking damage.
Obtain Manly Musk.
Sample the entire menu!
Obtain the Fossil.
Collect 50% of the Dark Magic.
Defeated the Squid Baron.
Defeated the Squid Baron without taking damage.
Collect 50% of the Heart Squids.
Obtain the Golden Pickaxe.
Obtain all three Mummy Sketches.
Defeated the Empress Spider without taking damage.
Defeated the Empress Spider.
Destroy 10 Spider Eggs before they hatch.
Get Rottytops to Abner Tree without making any mistakes in a single attempt.
Obtain Squid Oil.
Defeated the Cyclops Plant.
Defeated the Cyclops Plant without taking damage.
Defeat 50 enemies using Pirate Weapons.
Use a Pirate Flare to return to Risky's ship.
Defeat 250 enemies using Shantae's Monster Whipper!
Release the Ham Stink.
Defeated the Ammo Baron.
Defeated the Ammo Baron without taking any damage.
Saved Scuttle Town as fast as possible!
Achieve 100% completion in record time!
Defeated the Pirate Master's true form without taking any damage.
Complete the game without any Health upgrades and all Heart Squids collected.
Defeated the Cyclops Plant using only Pike Balls.