This page contains Castlevania: Harmony Of Dissonance Unlockables for GameBoy Advance called "Boss Rush mode" and has been posted or updated on Jan 3, 2008 by Daveish. Let us know what you think of this Unlockable by thumbs voting.
Boss Rush mode
Beat the game to unlock the Boss Rush option. There are three levels (easy, normal, and hard) that must be unlocked by playing each in succession, starting with easy.
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