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