GAME MACHINE

PROBLEM TO BE SOLVED: To provide a game machine having a game property different from that of a conventional game machine. SOLUTION: The game machine includes a winning/losing determination means for determining whether or not to execute a special game of changing a big winning port from a closed state to an open state, a special game execution means for executing the special game when a winning symbol indicating that the result of winning/losing determination is a winning is displayed at a determination symbol display means, a probability variation determination means for determining which of a probability non-variable symbol and a probability variable symbol is the winning symbol, and a probability variation means for varying the probability that the result of the winning/losing determination becomes a winning from a normal probability to a high probability when the winning symbol becomes the probability variable symbol by the probability variation determination. The determination by the winning/losing determination means is performed by using a random number for the determination generated by a hardware determination random number generation means, and the determination by the probability variation determination means is performed by using a random number for the determination generated by a software determination random number generation means. COPYRIGHT: (C)2011,JPO&INPIT