This has got to be one of the most unique, interesting twists on the classic ARPG style in quite some time. At first, Book of Demons seems exactly like Diablo: we're picking one of three classes and heading beneath a church to start killing skeletons by the dozen, but then things take a turn.
Rather than free movement, your hero moves down pre-determined board game style paths, and both combat and leveling are handled via a card system.
This is all reinforced by the paper mini art style. It literally feels like playing a board game where you have to stick your paper tokens into plastic bases.