Wagering game having bonus-award feature with changing state

摘要

A gaming system for conducting a wagering game includes a display arrangement for displaying a video image overlaying a game display. The video image includes special symbols for indicating a bonus-award feature having a changing state. The changing state is continually updated or modified based on outcomes of the wagering game as displayed on the game display. The gaming system further includes a controller operative to cause the bonus-award feature to provide an award to the player in response to the state of the bonus-award feature meeting certain criteria.

主权项

1. A gaming system configured to play a casino wagering game including a changing-state bonus feature, the gaming system comprising:
at least one electronic input device configured to detect a physical item associated with a monetary amount that establishes a credit balance; at least one electronic display device; and one or more controllers configured to:
initiate a play of the casino wagering game in response to an input indicative of a wager covered by the credit balance;select an outcome of the play of the casino wagering game from a plurality of game outcomes, the plurality of game outcomes including a first outcome that changes a state of the changing-state bonus feature by adding one or more special symbols to an accumulation of special symbols, and a second outcome that changes the state of the changing-state bonus feature by subtracting one or more special symbols from the accumulation;direct the at least one electronic display device to display, on an array of symbol-bearing reels, a symbol combination representing the selected outcome overlaid by a video image of the accumulation;in response to the selected outcome being the first outcome, update the state of the changing-state bonus feature and, in response to the updated state meeting certain criteria, automatically provide a bonus award to a player and direct the at least one electronic display device to display, concurrently with the symbol combination on the array of symbol-bearing reels, a corresponding depiction of adding the one or more special symbols to the accumulation; andin response to the selected outcome being the second outcome, update the state of the changing-state bonus feature and, in response to the updated state meeting certain criteria, automatically provide a bonus award to a player and direct the at least one electronic display device to display, concurrently with the symbol combination on the array of symbol-bearing reels, a corresponding depiction of subtracting the one or more special symbols from the accumulation.