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