Modern casino slot games are controlled by a computer, and the win %s are preprogrammed into the software.
Casino Slots have Random Number Generators which are continuously generating combinations, even when the machine is not currently being played.
Running concurrently with the Random Number Generator of the casino slot machine game is the pay out rate per cent.
The payout per cent controls just how much the slot machine game will payout, for e.g. the pay out per cent could be ninety percent, meaning the slot machine will payout 90% of all the wagers played, and the casino only gets to keep ten per cent.
This is not to say that every time you bet ten credits you will receive 9 in return – where is the fun … fascination in that? Instead, the casino slot machine won’t payout for a little while, and then suddenly start up a hot streak and you might catch the big top prize.
The payoff percentages will most likely vary between the various games and a few of the most common casinos, for e.g Golden Online Casino, which gives a payout of up to ninety five percent!
Therefore, in essence, the slot machine takes all the cash played into it and pays it out to several lucky winners. The casino only gets to keep a considerably small per cent of all the stakes made.
The casino slot software controls every part of the machine, from the dazzling lights to the circulating of the reels.
When you hit spin on the one-armed bandit, a combination is generated by the RNG which associates with the pictures on the reel.