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