Sumo

      Ah, sumo.  It would seem the folks at Cognitoy got the idea from all of those sumo competitions you see happening at universities and such.  The principle is the same.  Just push your opponent out of the ring while preventing them from doing the same to you.

Hunker       A cautious rover, this thing can take an eternity to move**

Hunker1     Braver than the first, this one take more chances and less time***

Hunker2     The most daring of the three, this guy does not care****