Patent ID: 8562408

Claim:
A gaming machine comprising: a display that under the control of a game controller displays a plurality of display positions for displaying combinations of symbols; the game controller controlling operation of the gaming machine, and displaying selected images on the display; and a selector operable by a player of the gaming machine to enable the player to place one of a plurality of predefined wagers to wager on a play of a base game comprising at least a first wager consisting of a base wager, and second and third wagers each consisting of a base wager portion in a predefined ratio to an additional wager portion, wherein each of the plurality of predefined wagers is associated with a respective set of a plurality of predefined sets of rules, each of said sets of rules being applied based on the wager selected to be played; wherein the third wager has a higher predefined ratio of the additional wager portion to the base wager portion than the second wager, wherein any wager including an additional wager portion results in the player being made eligible to play at least one additional game, the additional game being selected by the player from a plurality of different additional games, wherein there is no guarantee that the selected at least one additional game will eventuate in a specific play of the base game as a result of the player having staked the additional wager portion, wherein when the selected at least one additional game eventuates, the selected at least one additional game provides an additional benefit to the player, and wherein when an additional game associated with the third wager eventuates, it provides a greater benefit than when an additional game associated with the second wager eventuates.