Bonus gaming systems for monitoring and controlling one or more gaming devices in a gaming system on at least one gaming floor are disclosed herein. The system includes one or more gaming devices interconnected via a network, a player tracking system in communication with the gaming devices, and a bonus gaming system in communication with the gaming devices. The bonus gaming system monitors and controls bonus sessions presented on the gaming devices, wherein the bonus sessions includes a plurality of bonus levels, wherein the bonus levels increase in bonus value in response to duration of game play by a player in order to maintain continued play by the player.