Castrum - Upcoming XBLA dungeon-crawler RPG Crimson Alliance will come in two forms: a $15 version with all 3 classes playable, or three different $10 versions, each with just one of the game's three classes playable. Basically, if you don't care about the classes that involve not ripping spleens out with your bare hands, you save $5.
Source: Game Informer
I think for 5 measly dollars its worth it