A mobile communication terminal includes a wireless communication device for wireless communication, an image displaying device for displaying an image, and a sound outputting device for outputting sound. The mobile communication terminal generates an execution variable that changes progression of a game being played by a user of the mobile communication terminal, through the mobile communication terminal, the execution variable being calculated based, at least in part, on incoming communications history data. The incoming communications history data lists data characterizing each of a number of previous incoming communications to the wireless communication device. The terminal executes the game using the generated execution variable.