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