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