Here is the full list of all 25 Anima: Gate of Memories - there are The Nameless Chronicles achievements.
Make Gaudemus create something for you.
Finish all possible conversations with Death.
Defeat Ergo and The Bearer in the Nexus.
Defeat Nascal the Puppetmaster.
Defeat Red Lady.
Free the prisoner from his prison.
Unlock the access to the Inner Halls of Arcane.
Defeat the Shadow of the Nameless.
Obtain the Thanathos Nekrom.
Defeat the three guardian shadows.
Defeat Ergo and The Bearer in Erynes.
Get the rank of Grand Maister in the Cathedral of Erynes.
Defeat Rametek.
Defeat Druaga.
Help the Priest of Erynes.
Reach Arcane.
Finish the prologue.
Unlock the Secret Ending.
Finish the game obtaining the True Ending.
Finish the game obtaining the Alternative Ending.
Finish the game in New Game+.
Find all the hidden items in Arcane.
Defeat the Secret Boss.
Reach Level 16.
Find all the fragments of Velez’s Soul.