The ornamental design for a tieredgame, as shown and described.
FIG. 1 is a perspective view of the tiered game of my new design.
FIG. 2 is an elevational view of the front side thereof. The elevational view of the rear side is a mirror image thereof.
FIG. 3 is an elevational view of the left end thereof, with reference to FIG. 2. An elevational view of the opposite end is a mirror image thereof.
FIG. 4 is an plan view of the top thereof; and,
FIG. 5 is a plan view of the bottom thereof.
The broken line elements in FIG. 1, and FIG. 4, depicting a plurality of balls and ground elements in and around the tiered game of my new design, are environmental elements and are not a part of my new design.