Castlevania: Harmony of Despair is a 2D action-adventure game for the Xbox Live Arcade. The game features a new map system that allows players to see the current quest map's entire setup, as well as up to six players at once over Xbox Live.
Gameplay includes a co-op mode, which plays like the "Boss Rush Mode" of previous 2D Castlevania games, but with several rooms and items to find, culminating in a boss to fight. It also includes a versus mode, with battle occurring between players. Some bosses are able to attack players on their way to the fight.