Here is the full list of all 25 Anima Gate of Memories achievements.
Finish the game in New Game+.
Reach Level 20.
Obtain the Joke Ending.
Finish the game obtaining the Early Ending.
Finish the game obtaining the True Ending.
Find all items, weapons and artifacts.
Defeat the Secret Boss.
Obtain the Angelus.
Defeat Romeo Exxet.
Finish the game obtaining the Bad Ending.
Defeat for second time The Nameless Messenger.
Finish all possible conversations with Ergo.
Free all Prisoners.
Defeat Malekith, the Lord of Nightmares.
Obtain all Memories
Finish the game obtaining the Worst Ending.
Defeat Druaga.
Give the Blood Stone to its owner.
Defeat Jonathan Kappel.
Open the way to the upper floors.
Defeat The Nameless Messenger for first time.
Defeat Nascal the Puppetmaster.
Steal from the rich, give to myself!
Reach Arcane.
Defeat a Memory Knight.