Modern casino slot games are controlled by computer software, and the winning %s are pre-programmed into the game software.
Casino slot machines have Random # Generators which are ceaselessly generating combinations, even when the game is not currently being played.
Running in sync with the RNG of the casino one-armed bandit is the pay out per cent.
The payout percentage controls how much the slot machine game will pay, for example the payout percent might be ninety percent, which means the slot machine will pay 90% of all the stakes played, and the casino gets to keep ten per cent.
This does not mean that for every time you bet ten credits you will receive 9 in return – where’s the fun … excitement in that? Instead, the casino slot will not pay out for a little while, and then suddenly hit a hot streak and you might draw the big jackpot.
The pay out %s will tend to vary between the different games and a handful of the notably established casinos, for example Golden Online Casino, which gives a pay out rate of up to 95 percent!
Thus, in essence, the slot machine game takes all the money played into it and pays it out to a handful of lucky winners. The casino only gets to keep a generally minute percent of all the stakes made.
The casino slot software controls any part of the machine, from the flashing lights to the revolving of the reels.
When you hit spin on the one-armed bandit, a combination is formed by the RNG which corresponds to the pictures on the reel.