1. A game system with a display part including a first frame and a second frame being different from the first frame and a controller controlled by a user, the game system comprising: game space control means for generating a virtual game space; player object control means for generating a player object in the game space and causing the player object to act in the game space based on object operation information input from the controller; target object control means for generating a target object in the game space and causing the target object to act in the game space; game image generate means for generating a game image which is an image obtained by photographing the game space from a specific sight line by a virtual camera and displaying the game image on the first frame; target image display means for displaying a target image by specifying and displaying the target object, before locking on, on the second frame in order for the user to select the target image for locking on, where the second frame is a touch panel; and lock on means for instructing the game image generate means to control the sight line of the virtual camera, after locking on, so that there exists at least a part of the target object specified by the target image in the game image when a lock-on operation is operated by the controller after the target image display means starts displaying the target image on the second frame.