Here is the full list of all 28 A Rose in the Twilight achievements.
Obtain all Blood Memories.
Obtain all the collections.
Defeat Viola.
Clear Path to Abyss.
Giant kills Rose by throwing her.
Die 100 times.
Defeat Blanc.
Clear Clock Tower.
Rescue Rose after she is taken.
Clear Library.
Watch the last moments of a beast.
Obtain 10 Blood Memories.
Clear Courtyard.
Die 30 times.
Clear Armory.
Obtain 5 Blood Memories.
Die 10 times.
Clear Dungeon.
Complete Time Attack within 1:20:00.
Complete Time Attack within 1:50:00.
Complete Time Attack for Clock Tower Upper Level within 1:50.
Giant jumps off from the highest point in the castle.
Clear Path to Abyss 1 without touching any mushrooms.
Watch the moon from somewhere in the castle.
Clear Time Attack within 2:40:00.
Clear Time Attack for Path to Abyss 2 within 2:10.
Throw Rose 100 times.
Perform a nice shot with Rose at Courtyard 4.