certain embodiments provide a method and system for awarding a progressive prize . the system includes a bank of gaming machines accepting different bets per play as selected by a player . a random number is selected from a predetermined fixed range of numbers that does not change during play of a gaming machine . the player is allotted one or more numbers for each credit bet . the allotted numbers represent a subset of the predetermined fixed range of numbers . a feature game is triggered for the progressive prize based on a numerical comparison between the selected random number and the number allotted to the player . certain embodiments provide a trigger condition for a feature outcome based on an event having a probability related to credits bet per game at a gaming machine . a probability of success in the feature game may be higher than a probability of success in the base game .