GAMING MACHINE FOR PERFORMING FREE GAME TRIGGERED FROM NORMAL GAME AND METHOD OF CONTROLLING THEREOF

To provide a gaming machine that can achieve higher entertainment properties. When the game transfers from the normal game to the free game, a roulette type selection process is carried out for determining a reference payout value that serves as a basis for the payout awarded when FEATURE symbols are arranged in a display window. In this roulette type selection process, it is determined that any of the fixed payout regions associated with the predetermined payout value or the non-fixed payout regions are stopped. When the fixed payout region is determined to be stopped, the payout value associated with the fixed payout region is awarded. When the non-fixed payout region is determined to be stopped, the mystery payout drawing process in which the awarded payout value is determined at random is additionally performed, and thus the payout value determined through the payout drawing is awarded. Then, the payout value awarded as described above is set as the reference payout value.