Patent attributes
According to a slot machine of the present invention, synthetic symbol images each including a first symbol image and a second symbol image are rearranged to a display. The first symbol image is associated with a predetermined prize. In a case where the first symbol images included in the rearranged synthetic symbols or a combination thereof constitute the predetermined prize, special first symbol images are displayed in place of the synthetic symbols including the first symbol images constituting the predetermined prize. The special first symbol images correspond to the first images constituting the predetermined prize.