4Beginning a Chapter
Move Out!
Choose SOLO from the main menu, and then touch MOVE OUT! You will be able to choose the chapter and
difficulty, and then begin playing.
The Fiend's Cauldron Before beginning a chapter, you can
place hearts in the Fiend's Cauldron to alter the chapter's Intensity. The higher the Intensity, the more difficult the chapter will be, but you will
receive more hearts for 
completing it and earn better loot.
About Hearts Hearts can be obtained in various ways, such as defeating enemies or dismantling weapons. You can use them to alter the Intensity of chapters or redeem them for new weapons.