Castlevania: White Night Concerto

Hard Mode:
Enter HARDGAME as your name. A sound will confirm correct code entry.

No Magic Mode:
To play the game using no spellbooks, enter "NO MAGIC" as your name when you start a new game.

Play as 8-Bit Simon:
After you've beaten the game and obtained Boss Rush Mode, input Up, Up, Down, Down, Left, Right, Left, Right, B, A, Select while the Konami logo is being shown. Enter Boss Rush mode and Simon will be automatically selected.

Play as Maxim:
After you beat the game, enter MAXIM as your name in a new game and you will start the game as him.

Unlock Boss Rush Mode:
To unlock the Boss Rush mode, where you play every single boss again, one after another, simply beat the game.