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