Abstract: A first value is calculated, based on a difference of a first load data based on an output of a first load sensor 82a provided at a right front part of a supporter 78 for supporting a player and a second load data based on an output of a second load sensor 82b provided at a right rear part of the supporter; a second value is calculated, based on a difference of a third load data based on an output of a third load sensor 82c provided at a left front part of the supporter and a fourth load data based on an output of a fourth load sensor 82d provided at a left rear part of the supporter; and an action of an object to be displayed on a display screen is determined based on the calculated first value and the second value.

Abstract: It is an object of the invention to generate sound effects based on a behavior of an operated object and of a non-operated object as distinguished between them by assigning an identifier to each object. A game device includes sound effect generating means which generates sound effects based on the behavior of the operated object and of the non-operated object. The sound effect of the operated object is generated by changing the sound effect serving as a reference according to the behavior of the operated object so as to have a different waveform from a waveform of the sound effect serving as a reference according to the behavior of the non-operated object.