 David Lewis (1969) introduced signaling games to explain how messages can be used to communicate something, although these messages do not have a pre-existing meaning. In pragmatics we want to do something similar: explain what is actually communicated by an expression whose actual interpretation is underspecified by its conventional semantic meaning. To account for pragmatic inferences in game theory, Parikh (1991, 1992) introduced games of partial information. These games are much like Lewis’s original signalling games, except that messages are taken to have a conventional semantic meaning, and speakers are assumed to say only messages that are true. In the interest of a broad overview, we gloss over interesting but subtle differences between Lewis' signaling games and Parikh's games of partial information.