Multivendor progressive gaming system

A system for facilitating the play of a game of chance, comprising:

• a plurality of base games;
• a plurality of game terminals located in a plurality of locations, each of the plurality of game terminals configured to allow a player to play at least one of the plurality of base games, the plurality of game terminals being divided into a plurality of sets of game terminals, each of the plurality of sets of game terminals having a respective contribution interval;
• a progressive game server;
• a network providing communication from the game terminals toward the progressive game server;
• and
• a shared progressive game jackpot maintained by the progressive game server, the progressive game jackpot accruing contributions as a result of a player's playing games on the plurality of game terminals,
• the progressive game server determining the size of the progressive prize when a winning player wins the progressive game on a game terminal in the first set of game terminals, the size of the progressive prize depending on the amount of contributions accrued from the first set of game terminals to the shared progressive game jackpot in the first set of game terminals' progressive contribution interval.