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