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