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