Each game has an overall theoretical return to player, which can be found in the “Help” section within the game itself, usually at the very bottom of the page.
This means that over the course of the game's lifetime--easily hundreds of thousands of hands--it will pay out an average that percentage on the dollar.
For example, a return to player rate of 95.15% means that over the course of the game's lifetime--easily hundreds of thousands of hands--it will pay out an average of 95 cents for each dollar bet on the machine. While this represents a small house edge, like any casino game, it does not mean that the game is "fixed" to this percentage, or to any other outcome. Rather, all outcomes in our casino are determined by a random number generator. These generators, and the overall game performance, are audited on a quarterly basis by an independent third party.