Persuasive Games: The Expressive Power of Videogames (MIT Press 2007) is a book written by Ian Bogost. Bogost discusses the importance of videogames in influencing players and making arguments. He focuses on the history of rhetoric, arguing that games represent a new form of it. He calls this new form Procedural Rhetoric.
Persuasive Games is also the name of an independent videogame company which focuses on social and political issues, trying to broaden the uses that games currently have. The company was funded by Ian Bogost and Gerard LaFond.