Peripheral device, information processing system, and method for connecting the peripheral device

A gaming device for use with a mobile device, the mobile device including a display screen, the gaming device comprising:

• a front side;
• a rear side with a plurality of convex portions that project rearwardly relative to another portion of the rear side, wherein a first one of the convex portions is in a right portion of the rear side and a second one of the convex portions is in a left portion of the rear side;
• a top side with a left shoulder button and a right shoulder button, wherein the left shoulder button and the right shoulder button are configured to be actuated by fingers of a user's left and right hands, respectively, while the user grips the convex portions;
• a left side;
• a right side;
• a directional input device on the front side and operable by the user's thumb when the user grips the gaming device such that the user's thumb is adjacent the front side and at least one finger is adjacent the rear side;
• an interface configured to communicate inputs from the directional input device to the mobile device;
• and
• a holding portion including a wall, the wall having at least one side cut-out provided therein, the holding portion being configured to detachably hold the mobile device,
• wherein the rear side does not include any user input devices,
• wherein the holding portion is configured to hold the mobile device on two sets of opposed sides of the mobile device, and
• wherein the at least one cut-out includes an upper side cut-out and a side lower cut-out, the upper side cut-out being provided along a central portion of an upper peripheral portion of the holding portion and the lower side cut-out being positioned along a central portion of the a lower peripheral portion of the holding portion,
• wherein at least a portion of the holding portion comprises an elastic and deformable material to facilitate mounting of the holding portion on the mobile device.