Here is the full list of all 31 Dust: An Elysian Tail trophies - there are 16 bronze, 8 silver, 6 gold and 1 platinum.
Defeated Baron Kane
Successfully complete a 1000+ hit combo
Defeated Lady Tethys
Completed 10 Sidequests
Completed 5 Sidequests
Defeated Fuse
Kill 500 Enemies
Craft an item from a blueprint
Meet Haley
Successfully complete a 200+ hit combo
Reign chaos by putting poison ivy into Gianni's laundry
Successfully Parry with less than 10% health remaining
Unlock a Cage and Rescue a Friend
Level Up by Assigning Skill Gems
Use the DUST STORM on Fidget's Projectiles
Unlock a Treasure Chest
Pick Up an Ability Orb
Unlock all other Trophies
Defeat General Gaius
Completed 20 Sidequests
Hang out with Twelve Friends in the Sanctuary
Earn a Four-Star Rating in any Challenge Arena
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
Complete the Game on Tough or Hardcore setting
Kill an enemy with the slide attack
Fulfill Bopo's wish for snow
Destroy every enemy Cannon