Hidden Agenda centers on a group of people who are trying to stop a serial killer. A group of four friends use their phones to make group decisions in the game — e.g., stick together or go separately when entering a new area. Sometimes, one person is forced to make a choice. The game secretly gives one player a secret objective that could put them at odds with the others. Hidden Agenda is one of the first games to support Sony's new PlayLink feature, which lets a group of people play together with their smartphones.