Patent ID: 8172676

Claim:
A system for managing game accounting on at least one gaming machine, wherein the gaming machine comprises one or more active games, the system comprising: a memory device, operatively connected to the gaming machine, wherein the memory device stores a set of active game meters for each active game on the gaming machine, and one set of deleted game meters accumulating data corresponding to all games deleted from the gaming machine; and an accounting processor, operatively connected to the gaming machine and the memory device, for: receiving active game data from the gaming machine and storing the active game data in applicable active game meters in the memory device; for any deleted game, capturing the game state data prior to the game's deletion and storing the game state data in the applicable accumulating deleted game meters; and accessing the stored game data in the active and deleted game meters and determining the overall gaming machine performance by comparing a calculated theoretical win value with a return percentage of the gaming machine, wherein the calculated theoretical win value is a theoretical performance of the gaming machine based on a theoretical payout percentage and the active and deleted game meters and the return percentage is only based on the active and deleted game meters.