In providing a gun shooting game allowing selective use of one or more types of controller among multiple types of controller, the effect of difference between controllers on the game can be diminished. A gun shooting game device 10 allowing selective use of one or more types of controller among multiple types of controller includes a target display unit 100 for displaying a target, a controller type determination unit 102 for determining the type of a currently used controller, a hit determination unit 103 for determining whether or not a bullet has hit the target based on data supplied by the controller, and a range extent control unit 104 for controlling the extent of a range in which the bullet is determined as hitting the target among supplied data based on the controller type.