Castlevania: Harmony of Despair
 

It's a long shot but has anyone played this? It's a Live Arcade game and it's incredibly addictive. Essentially you have to work your way around a huge maze like level and kill the boss but it has a lot of RPG elements like stats and Item hunting, Different characters that have their own strengths ETC.

It's online as well which is fun although some of the randomers just run straight through and kill the bosses before the rest of the team has chance to breath. If you find a good team though it's incredibly addictive.