Các điều khiển game:
Try to keep your job as a door to door soulsman. Talk to people in order to get them to confess you their deepest wishes. In "Knock Knock", you play Dave Hill, a little silly Travelling Sellsman in souls stuff at the service of the devil and your goal is to keep your job by succeeding the ultimatum that Satan has given you. You will have to collect more souls than Rodrique the stone by going to propose the best wishes to the humans against a super mega pact ultra cool.