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 with 100% completion!
Collect all Monster Cards.
Open all Shock Machines.
Unearthed all secrets.
Upgrade all magic to max.
Witness every magical outcome with Slimes.
Shock a circus squid.
Win the highest total in a Hula Contest.
Complete the game in Beginner or Definitive Mode.
Complete the adventure!
Defeated the Empress Siren.
Complete a Ghostly Quest.
Defeated the fifth Siren.
Deactivate all the Towers.
Turn an enemy to an ally by helping them heal.
Obtain all magical forms.
Unearth a buried treasure.
Learn all magical dances.
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.
Enter the Sea Lab.
Obtain the Lucky Amulet.
Uncovered a possible threat.
Defeated the second Siren.
Use the valve.
Reach Tree Town.
Defeated the first Siren.
Have three Monster Cards equipped at once.
Took the tour!
Obtain a Monster Card.