The ornamental design for the block for game device, as shown and described.
FIG. 1 is a front, top and right side perspective view of my new design for a block for game device;
FIG. 2 is a front elevational view of the block for game device of FIG. 1;
FIG. 3 is a rear elevational view of the block for game device of FIG. 1;
FIG. 4 is a top plan view of the block for game device of FIG. 1;
FIG. 5 is a bottom plan view of the block for game device of FIG. 1;
FIG. 6 is a right side elevational view of the block for game device of FIG. 1;
FIG. 7 is a left side elevational view of the block for game device of FIG. 1; and,
FIG. 8 is an end elevational view of the cut section of the block for game device of FIG. 1 taken along the line 8—8 in FIG. 2 in which internal structure is omitted.