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