Book of Demons is a Hack & Slash Deck-building hybrid in which you decide the length of quests. Wield magic cards and slay the armies of darkness in the Old Cathedral dungeons. Save the terror-stricken Paperverse from the clutches of the Archdemon himself! Book of Demons is a tale of good and evil about saving the world from the ultimate devilry. Inspired by the dark and gloomy atmosphere of the first Diablo game, Book of Demons is part tribute part parody of hack & slash classics.