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