"kill puppies for satan" is a role-playing game published by Lumpley Games. In this game the players play characters who must accomplish evil deeds to be rewarded with supernatural powers by Satan.
Being evil is complicated. Killing too many good people sends them to heaven, and Satan needs the bad people down on Earth. Actively attempting to convert people to evil is the job of the demons who have a strong union, and torturing people often causes them to start praying.