Book of Demons is a hack & slash game that takes place in the pop-up book world of Paperverse. It is the first installment of the Return 2 Games series, inspired by the early golden days of PC gaming. The game is about slaying the armies of darkness in the dungeons below the Old Cathedral and saving the terror-stricken Paperverse from the clutches of the Archdemon himself.

The game has a unique feature called Flexiscope™ system, which allows players to set the length of each quest, making it the first truly accessible hack & slash game. You can collect powerful skill cards and assemble your favorite set of devastating powers to defeat your enemies. With over 70 kinds of creatures waiting to be slain, you won't get bored by the diversity of monsters. Book of Demons offers a procedurally generated, randomly-populated adventure of its own, ensuring that you never explore the same dungeon twice.