US Patent 10328350 Attachment and control system

An example attachment is attachable to a game controller including a controller-side slide portion on which a controller-side operation button is provided. The attachment includes an attachment-side slide portion and an attachment-side operation button. The attachment-side slide portion is provided on a first surface of the attachment, wherein the attachment-side slide portion is configured to slidably engage with the controller-side slide portion in a predetermined slide direction, and wherein the controller-side slide portion is insertable into the attachment-side slide portion from a first side in the slide direction. The attachment-side operation button is capable of protruding from a second surface on a reverse side from the first surface. The attachment-side operation button includes a actuation portion capable of protruding from the first surface, thereby pressing the controller-side operation button, in response to an operation of pressing the attachment-side operation button.