Abstract: A hand grip provides a means to attach at least one hand-held game controller so that a user can with a single hand grasp of the hand grip and its attached game controller carry the hand grip while the fingers of that same hand can manipulate one or more actuators of said attached game controller while further carrying or operating appropriate supported equipment. The hand grip enables a user to assemble his or her own custom-built interactive, portable device by subsequently attaching various hand-held game controllers to appropriate support apparatus such as a camera support apparatus. Where said support apparatus may optionally and subsequently fixedly support appropriate supported equipment including a mobile computing device, a portable display, or motion-sensing equipment. The hand grip allows a user to arrange the hand grip(s) and any attached support apparatus or supported equipment in a variety of configurations that facilitate hand-held to shoulder-carried configurations.