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