A promotion index value is produced for a player in a bingo game. This promotion index value is then used in assigning a prize to the player for their participation in the bingo game. In one embodiment, a particular bingo pattern achieved in a bingo game is associated with an initial index value. The promotion index value is then produced and added to the initial index value to produce a final index value. This final index value is then used to look up an associated bingo game prize which is assigned to the player.