In Castlevania: Harmony of Despair for the Xbox 360, there is a hidden item in each chapter that will boost your end score when you collect them.
The Crown is hidden in Chapter 2. Use the yellow ledge to play the piano notes in this order, from left to right: 5th white, 5th black, 6th white, 5th white, 2nd black, 5th white, 6th black, 6th white
There are six hidden items to collect, so check out my guide to find the other hidden items in Castlevania: Harmony of Despair.
