A method for outputting data streams in a communication system, the method comprising the steps of: executing an electronic game application at a user terminal, the game application being programmed to allow two or more users of the communication system to participate in the game; receiving two or more data streams at the user terminal, each data stream being generated by a user of the communications system participating in the game; applying game logic to determine the current state of the game application; and selecting one or more of the received data streams to be output from an output device of the user terminal, wherein the selection depends on the current state of the game application.