True Story mode
Successfully complete Story mode with Dracula to unlock True Story mode. This mode has an alternate background at the character selection screen, another battle with Aeon, and a final Boss battle with the Time Reaper.

Hard mode
Successfully complete Story mode on the Normal difficulty to unlock the Hard difficulty.

Brutal mode
Successfully complete Story mode on the Hard difficulty to unlock the Brutal difficulty.

Bonus characters
Successfully complete the indicated task to unlock the corresponding character in Story mode:

Aeon: Connect to Castlevania: Order Of Ecclesia. Alternately, successfully complete True Story mode with Aeon.
Carmilla: Successfully complete Story mode with Eric.
Cornell: Successfully complete Story mode with Carmilla.
Death: Successfully complete Story mode with Trevor. Alternately, successfully complete True Story mode with Death.
Dracula: Successfully complete Story mode with Simon, Alucard, Maria, Eric, Carmilla, Grant, Golem, Sypha, Cornell, Trevor, Death, and Shanoa. Alternately, complete True Story mode with Dracula.
Eric: Successfully complete Story mode with Maria.
Golem: Successfully complete Story mode with Grant.
Grant: Successfully complete Story mode with Sypha.
Maria: Successfully complete Story mode with Alucard.
Shanoa: Connect to Castlevania: Order Of Ecclesia. Alternately, successfully complete Story mode with Trevor or True Story mode with Shanoa.
Sypha: Successfully complete Story mode with Simon.
Trevor: Successfully complete Story mode with Simon, Alucard, Maria, Eric, Carmilla, Grant, Golem, Sypha, and Cornell.

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