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