US Patent 7410420 Game machine with selectively controllable mechanical cover

A game machine that displays symbols is provided. A display module of the game machine can display multiple types of symbols in multiple display regions when a game starts. An evaluation module evaluates whether or not a predetermined condition is met in a game. A display control module changes the number of symbols that can be displayed in the display regions when the condition is met. As a result, a game machine with symbols displayed in a unique manner is provided, and a game that provokes a player's curiosity can be implemented.