Patent attributes
A gaming system configured to operate a game associated with a plurality of symbols. For a play of the game, the gaming system displays a plurality of reels, each of the reels including a plurality of the symbols and being associated with a plurality of symbol display areas. For an activation of the reels, the gaming system randomly generates and causes each of the reels to display one of the symbols on that reel at each of the symbol display areas associated with that reel. Upon an occurrence of a triggering event, the gaming system: adds one or more wild symbols to one or more of the reels and provides a plurality of additional activations of the reels. If a removal condition is satisfied prior to a final one of the additional activations of the reels, the gaming system removes a remaining wild symbol from one of the reels.