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