Here is the full list of all 36 Dungeon Defenders Eternity achievements.
Successfully trade with another player
Complete all Challenges on Insane
Earn more than 1 million Gold
Rescued the Legendary Heroes from the Crystalline Dimension on any difficulty setting
Complete a Challenge Mission with a full party
Raise a Splendid Pet to its maximum potential!
Complete an Insane Survival Mission
Complete a mission with a full party with all players using different Heroes and without swapping Heroes
Have four Amulets and one Pet equiped at once. Additionally, have more than 1000 Offensive and Defensive Ability Power
Upgrade 14 levels on a single item
Complete all Act 2 levels on any difficulty setting
Rescue the Legedary Heroes from the Crystalline Diemsnion with a full party without running out of lives
Use 10 different consumables in a single Mission
Wear a complete armor set
Complete all Bonus Maps on Insane
Be the first player to activate an Eternia Crystal every wave while in full party mission
Achieve the most kills with your Hero in a full party
Collect 20 different pets in your Item Box
Complete all Act 3 levels on Insane
Craft an item of Splendid quality
Reached Hero Level 10
Leveled one of each Hero to Level 60
Wear a complete set of Transmogrified gear
Complete all Act 1 levels on Insane
Complete every Challenge Mission
Reached Hero Level 60
Complete a Survival Mission on any difficulty setting
Gathered all Eternia Shards on any difficulty setting
Gathered all Eternia shards on Insane
Complete a mission with a full party with all players using the same Hero and without swapping Heroes
Complete all Act 3 levels on any difficulty setting
Complete all Act 1 levels on any difficulty setting
Rescued the Legendary Heroes from the Crystalline Dimension on Insane
Reached Hero Level 30
Deal more than 100 million Elemental damage with your weapon in a single Mission
Complete all Act 2 levels on Insane