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