A gaming machine including a display, a game controller, and a selector. A player operates the selector to enable the player to place one of a plurality of possible wagers on a play of the game comprising at least a first wager consisting of a base wager, and second and third wagers each consisting of a base wager portion and an additional wager portion. There is no guarantee that the at least one added feature will eventuate in a specific play of the game as a result of the player having staked the additional wager portion.