Here is the full list of all 40 Shantae and the Seven Sirens achievements.
Complete the adventure with 100% completion as quickly as possible!
Complete the game without any Health upgrades and all Heart Squids collected.
Complete the game in Rule Breaker or Full Deck Mode.
Complete the adventure as quickly as possible!
Avoid startling the Lobster Girl throughout the adventure.
Complete the adventure!
Complete the game in Beginner or Definitive Mode.
Complete the adventure with 100% completion!
Defeated the Empress Siren.
Collect all Monster Cards.
Unearthed all secrets.
Open all Shock Machines.
Witness every magical outcome with Slimes.
Shock a circus squid.
Deactivate all the Towers.
Upgrade all magic to max.
Defeated the fifth Siren.
Obtain all magical forms.
Complete a Ghostly Quest.
Unearth a buried treasure.
Learn all magical dances.
Win the highest total in a Hula Contest.
Defeated the fourth Siren.
Revitalize cellular functions.
Locate the sunken ship remains.
Fell for a double cross.
Open a Shock Machine.
Ascend to Armor Town.
Defeated the third Siren.
Turn an enemy to an ally by helping them heal.
Enter the Sea Lab.
Obtain the Lucky Amulet.
Defeated the second Siren.
Use the valve.
Uncovered a possible threat.
Reach Tree Town.
Defeated the first Siren.
Have three Monster Cards equipped at once.
Took the tour!
Obtain a Monster Card.