The document discusses the design of pervasive live action role-playing games (larps). It defines pervasive games as games that expand the boundaries of play spatially, temporally, or socially. Examples of pervasive larps mentioned include Helsingin Camarilla, AmerikA, Momentum, and The White Road. Key aspects of pervasive larps discussed include using the city as a backdrop, merging game and real life, altering players' perceptions, and creating societal dialogue.