Abstract: The present invention concerns a controller for use with racing games and simulations running on a personal computer which includes a specially adapted attachment mechanism for desktop mounting. A particular embodiment of the controller includes a housing for removably attaching the controller to a desktop and a rotatable steering wheel mounted to the housing for manipulating the game object. An clamping assembly is received in the housing. An adjustable arm is pivotally connected to the clamping assembly and includes a substantially curved bridging portion and a distal end, the bridging portion extending to an underside of the desktop such that the distal end opposes an extension of the housing on an upper side of the desktop. The clamping assembly binds the desktop between the arm and the housing. A first embodiment of the clamping assembly includes a retention tube received in the housing having a first end and a threaded second end. A clamp is pivotally connected to the retention tube first end.