Patent ID: 8858320
Filing Date: 2014-10-14
Classification: G07F

Abstract:
1. A slot machine comprising: a symbol display configured to scroll-display a symbol array that includes a plurality of symbols; and a controller configured to execute a normal game in which the symbol array is scroll-displayed in a first direction and then stop-displayed to said symbol display, and in which game media are paid out in an amount corresponding to one or a combination of the stop-displayed symbols; randomly determine a number of extra symbols to be added to one or more reels of the symbol array, when a predetermined condition has been satisfied in an executed normal game; and display an addition of at least one extra symbol to the one or more reels of the symbol array, based on the randomly determined number of extra symbols to be added to the symbol array, while the one or more reels of the symbol array are scrolled in a second direction opposite to said first direction, the addition of the at least one extra symbol being performed at a speed allowing an external observer to visually recognize the addition of the at least one extra symbol to the one or more reels of the symbol array.