Unveil Vincent's Past.
Some say that the fighting system that was brought into Dirge of Cerberus was annoying, just going around shooting enemies, instead of the traditional final fantasy fighting system...but I think it fit the game and the story, and it was bound to change (moving around freely, killing monsters), especially since there is word of a similar fighting system being introduced in the new Final Fantasy XIII project (PS3).
Overall, this game was fun, a little lacking on the classic final fantasy quality, but it contained an interesting story, and interesting characters, both new, and old.