Here is the full list of all 25 Anima: Gate of Memories achievements worth 1,000 gamerscore.
Finish the game in New Game+.
Obtain the Joke Ending.
Sometimes the plan is foiled before it starts.
Stop Baal. Close the door.
Reach Level 20.
Find all items, weapons and artifacts.
Defeat the Memory of The Calamity.
Obtain the Angelus.
Defeat Romeo Exxet.
Unleash the ultimate monster in the world.
Defeat for second time The Nameless Messenger.
Free all Prisoners.
Finish all possible conversations with Ergo.
Defeat Malekith, the Lord of Nightmares.
Obtain all Memories
A hollow victory...
Defeat Druaga.
Give the Blood Stone to its owner.
Open the way to the upper floors.
Defeat Jonathan Kappel.
Defeat The Nameless Messenger for first time.
Defeat Nascal the Puppetmaster.
Steal from the rich, give to myself!
Reach Arcane.
Defeat a Memory Knight.