Patent ID: 8235793

Claim:
A method for use with a gaming machine that, in response to the staking of a wager by a player, is arranged to randomly determine an outcome of a game, display on a display representations of the outcome, and award an award if a winning outcome occurs, wherein the player can stake a variable sized wager on the occurrence of a winning outcome, the method including: displaying a plurality of prize schedules for selection by the player, each prize schedule including a plurality of prizes and at least one special prize; receiving a selection of a prize schedule from the player; varying the probability of an outcome associated with the special prize and one or more other prizes in the selected prize schedule, wherein each of the plurality of prize schedules are formed to have the same rate of return to the player (RTP), the RTP being calculated based on the probability of an outcome in proportion to the size of the wager staked by the player; wherein the probability of winning the special prize in the selected prize schedule is held constant, and the RTP of the game is maintained by varying the value of the special prize in the selected prize schedule, the RTP being calculated based on the value of the special prize in the prize schedule in proportion to the size of the wager staked by the player.