Katamary Damacy [PlayStation 2 the Best] Japan

This unique action-puzzle game from Namco plays on the idea of the 'snowball effect.' Players take control of a tiny, sticky, little ball, and are challenged to grow it to an enormous size. When they begin, their ball can only pick up little items, such as paper clips and thumbtacks. As more and more items collect on the ball's surface, however, it becomes bigger, and capable of picking up larger objects.