1. A gaming machine comprising: an information reading unit that reads object information from a reading object provided with a storage medium in which the object information is stored, the reading object being mountable on the gaming machine; a game processing unit that performs game processing to provide to a player a game in a plurality of game states including a base game state and a bonus game state in which a grater advantage is provided to the player than in the base game state; and a display unit that displays an effect related to the game, wherein the game processing unit controls a frequency of occurrence of the effect to be displayed on the display unit during the game based on the object information read from the reading object by the information reading unit.