The ornamental design for an attachment for a gamemachine, as shown and described.
FIG. 1 is front, top and right perspective view of an attachment for a game machine showing our new design;
FIG. 2 is rear, bottom and left perspective view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a rear view thereof;
FIG. 7 is a left side view thereof, a right side view being a mirror image thereof; and,
FIG. 8 is a perspective view thereof, showing the attachment for a game machine in it's environmental use. The broken lines showing of a game machine is for illustrative purpose only and form no part of the claimed design.
Method of carrying out communication between different game devices, a game system played by using the method, and a recording medium used in the game system