To keep a game expectation feeling to a game machine, wherein a plurality of kinds of privileges are simultaneously started, longer.

The completion conditions for privileges are respectively set in advance for the plurality of kinds of privileges such as a probability variation, the shortening of a special pattern period of time, the shortening of a normal pattern period of time, the extension of a normal character opening period of time. Then, the plurality of kinds of privileges are respectively completed conforming to the completion conditions. Therefore, the plurality of kinds of privileges are completed conforming to the completion conditions which are respectively set in advance, and respective privileges are prevented from being completed at once by differing the completion conditions. Thus, the game expectation feeling of a game player can be kept longer.