Patent ID: 8469814

Claim:
A game apparatus executing, multiple times, a game for causing a player to perform a predetermined game operation using a controller provided with an angular velocity sensor, and performing a game process based on operation data including angular velocity data, which is obtained from the angular velocity sensor each time the predetermined game operation is performed, the game apparatus comprising: a parameter value determination unit for determining a value of a predetermined parameter in accordance with the angular velocity data obtained from the angular velocity sensor each time the predetermined game operation is performed; a deviation tendency value calculation unit for calculating a deviation tendency value, which indicates a degree of deviation tendency of a value of the parameter with respect to a target value of the parameter, the target value being required in the game, in accordance with the value of the parameter determined based on the predetermined game operation performed once or more in the past; and a game process unit for correcting the value of the parameter determined by the parameter value determination unit with the use of the deviation tendency value calculated by the deviation tendency value calculation unit, and for performing the game process with the use of the corrected value of the parameter.