| 摘要 |
PROBLEM TO BE SOLVED: To give expectation for a big win even in a short-time game in a game machine setting a first value effective outside the game machine and a second value effective inside the game machine in a game medium and selectively switching the second value only. SOLUTION: In a pachinko game machine 1, a big win lottery means (a main control board 29) sets a higher winning probability of a big win lottery the higher the second value is, a second game medium converting means (a pay-out control board 33) sets the number of game media paid out in an ordinary game substantially proportional to the second value, and the second game medium converting means or a specified game means sets the total number of game medium acquired by a game player in a special game so that the theoretical value return rate is substantially constant regardless of the second value. COPYRIGHT: (C)2005,JPO&NCIPI
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