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