From the campaign:
It's a game that you play throughout the course of the ENTIRE game night. You pass out role cards when everyone arrives, and then you tally the score when everyone leaves. As a player you have one job, fulfill your duty as stated on your card. Maybe you are the Glutton. All you need to do is make sure someone hands you food or drink. It's easy enough to say "can you pass me those chips?", but at the same time is it too obvious to say that? Other players can call you out, which will eliminate you from the game, so you better be slick about it. It's all about setting up your agenda in an unsuspicious way. That's Pretense for you.