INFORMATION PROCESSING PROGRAM, INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING SYSTEM AND INFORMATION PROCESSING METHOD

PROBLEM TO BE SOLVED: To provide an information processing program, an information processing device, an information processing system and an information processing method that are capable of preventing processing unintended by a user from being performed due to an attitude change generated by an operation to an operation unit.SOLUTION: A game machine 1 calculates attitudes from results of detection by an acceleration sensor 21 and a gyro sensor 22, chronologically stores an average value of the calculated attitudes as attitude information 16a in a secondary storage unit 16, and repeats processing to display a three-dimensional virtual space on a display unit 11 in accordance with an attitude at a current time point. When a predetermined operation is performed to an operation unit 12, the game machine 1 obtains, from the secondary storage unit 16, the attitude information 16a a predetermined period before a time point at which the predetermined operation is performed, and generates a two-dimensional image from the three-dimensional virtual space at the time point at which the predetermined operation is performed, on the basis of the attitude information 16a the predetermined period before the time point.