Here is the full list of all 30 Dust: An Elysian Tail achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Earn a Four-Star Rating in EVERY Challenge Arena
Complete the Game on Tough or Hardcore setting
Defeat General Gaius
Destroy every enemy Cannon
Hang out with Twelve Friends in the Sanctuary
Complete 20 Sidequests
Fulfill Bopo’s wish for snow
Defeat Baron Kane
Simultaneously Kill 6 Enemies with a Single Bomb
Kill an enemy with the slide attack
Complete all Fale Quests
Earn a Four-Star Rating in any Challenge Arena
Defeat Lady Tethys
Complete 10 Sidequests
Reign chaos by putting poison ivy into Gianni's laundry
Successfully complete a 1000+ hit combo
Complete 5 Sidequests
Defeat Fuse
Unlock a Cage and Rescue a Friend
Kill 500 Enemies
Bug Matti
Craft an item from a blueprint
Opt out of putting poison ivy into Gianni's laundry
Meet Haley
Successfully complete a 200+ hit combo
Successfully Parry with less than 10% health remaining
Level Up by Assigning Skill Gems
Use the DUST STORM on Fidget's Projectiles
Pick Up an Ability Orb
Unlock a Treasure Chest