Online casinos give players a free play bonus allowing a period of play time on the casino games. The free play casinos are only available at Microgaming casinos which offers the best casino games on the net. Each owner of the online casinos powered by Microgaming do set the amount of time alotted for the free play casino bonus. Some give you a hour of play where others give twenty four hours to play the bonus. The amount of credits given by Free play casinos varies as well, and not always bigger is better in this case as you will have to wager through the credits more times. We have listed the free play casinos above which are the higher amounts of free money.