It is something known as theoretical payout percentage or Return to the player. A scatter can also work in order to award the free spins to the player. Video slot machine : video slot machine is a recent innovation andit does not have moving parts. On the computer, the credit meter may be displayed in the simulated display or in a new font. With this option, the game are entertaining and the player can decide to play them whenever he wants without having to wait. With these games, there are video effects which had been added. A slip indicates how much coin that is put into the hoppers and there should be signature to the employees which are working together.