A game system of the present invention serves to: (a) compare a first predetermined count predetermined for first identification information with a reception count of input data, based upon the first identification information included in the input data of a first gaming machine among the plurality of gaming machines, and thereafter, execute a random determination process as to whether or not to award a first prize, in a case where the reception count has reached the first predetermined count; and (b) compare a second predetermined count predetermined for second identification information with a reception count of input data, based upon the second identification information included in the input data of a second gaming machine among the plurality of gaming machines, and thereafter, execute a random determination process as to whether or not to award a second prize, in a case where the reception count has reached the second predetermined count.