Patent ID: 8454425

Claim:
A gaming machine that provides games in which a plurality of symbols are selected from a group of symbols and displayed on a display and, if a winning combination occurs, the gaming machine awards an award, the gaming machine comprising a user interface in communication with a game controller, the game controller being configured to: provide a first game, maintain an event counter, and modify said event counter each time a counter event occurs during the first game; provide a second game, modify the group of symbols to include a number of specific symbols, the number of specific symbols being dependent on the value of the event counter; and wherein the game controller is configured to maintain a second event counter and modify the second event counter each time a second counter event occurs during the first game; and wherein the game controller is configured to modify the group of symbols to include a number of second specific symbols, the number of second specific symbols being dependent on the value of the second event counter.