Patent ID: 7575516

Claim:
In a network of gaming machines, each of said gaming machines accepting different wager amounts and accepting a single wager per play of a first base game, a method of randomly awarding one progressive prize from a plurality of progressive prizes using a second game to select said one progressive prize, said second game being displayed in response to an occurrence of a random trigger condition having a probability of occurrence related to an amount of the wager, comprising: accepting a wager at a particular gaming machine in the network of gaming machines; initiating a first main game at said particular gaming machine; causing a second game trigger condition to occur in conjunction with said first main game, said second game trigger condition occurring randomly and having a probability of occurrence dependent on the amount of said single wager and independent of the outcome of the base game; displaying a second game at said particular gaming machine in response to the occurrence of said second game trigger condition, said second game being displayed after completion of said first main game; randomly selecting said one progressive prize from said plurality of progressive prizes; identifying said one progressive prize according to the outcome of said second game.