Attachment for game controller and controller assembly

A controller assembly, comprising:

• a game controller, the game controller including:
• (i) a bar-shaped controller main body having an outer circumferential surface of varying diameter along a longitudinal direction thereof, where the diameter gradually reduces to a first diameter at a foremost part at a front end surface of the controller main body;
• (ii) a coupling portion located on the front end surface of the controller main body and having a second diameter that is smaller than the first diameter, and (iii) a light emitting part coupled to the front end surface via the coupling portion and being substantially in the form of a sphere having a third diameter larger than the second diameter;
• and
• an attachment for the game controller, wherein the attachment includes:
• a grip for being held by a user, and
• an attached portion attachable to, and detachable from, the outer circumferential surface of the controller main body, the attached portion including a front end at a most forward portion thereof, and an inner surface having a contour in complimentary conformity with the outer circumferential surface of the controller main body such that a fourth diameter of the inner surface also reduces substantially to the first diameter of the foremost part at the front end surface of the controller main body,
• wherein the attached portion is formed such that the front end surface of the controller main body is exposed and positioned forward of the front end of the attached portion, and the front end of the attached portion is positioned more rearward than the coupling part and the light emitting part when the attached portion is attached to the controller main body.