| 摘要 |
PROBLEM TO BE SOLVED: To allow a player to have a feeling of tension by fluctuating the completion probability of a CT mode. SOLUTION: A CPU is provided with a CT mode completion control part 35. The CT mode completion control part 35 is composed of a game counting part 40, a count determining part 41, an electronic lottery part 42 and a lottery result determining part 43. When a BB mode is completed to enter a CT mode, the game counting part 40 counts the number of games in the CT mode. The count determining part 41 determines whether or not the count value is the previously stored set value (five times) or less. When the count value is the set value (five times) or less as a result of determination, the result determining part 43 selects a high probability table 44 of high completion probability and determines whether or not the CT mode is completed, using a random number sampled by the electronic lottery part 42. When the count value exceeds the set value (five times), a low probability table 45 of low completion probability is selected, and whether the CT mode is completed, is determined.
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