Intellivision World Series Major League Baseball is a baseball sports game (1983), designed by Don Daglow and Eddie Dombrower and published by Mattel for the Intellivision Entertainment Computer System. IWSB was one of the first sports games to use multiple camera angles and present a three-dimensional (as opposed to two-dimensional) perspective. The title marked the beginning of the end of board game style single-screen or scrolling playfield games.