How are slot machines programmed?

How are slot machines programmed? – Many people think that slot machines are programmed to take all of your money and shell out a big win once in a blue moon.

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This is not quite exactly true, even though slots are biased in favor of the casino. But in order to learn how slot machines are programmed, you have to in fact learn how a slot machine works.

Once you know the details you will see that slots are in fact random games that can pay big on any given spin. 

How are slot machines programmed? – RNG Explained

The first thing you need to know is that slots are programmed to be fair and to have a certain payout percentage. This is regulated by gambling laws and the casino itself can in no way tamper with the slots payouts.

The payouts on the game are programmed by the manufacturer of the slot. This is the same for land-based and online casinos alike.

The reason for this is simple. If the casino can alter the payouts on the slots players will have a really hard time winning. So to keep things fair only the games manufacturer can program the casino games.

So every slot machine is run by a Random Number Generator (RNG). This ensures that the payouts in the game are random and ever spin is in no correlation with the previous one.

This is why you can never predict the outcome of the next spin based on the previous one. The RNG makes sure of this.

This also makes slots the hardest games to beat when playing at the casino. Another factor that influences the slots payouts is the Return to Player (RTP) percentage.

This is the promoted value which the slot machine will pay back to players in the form of winnings. So basically the casino keeps only the difference.

 If a slot has an RTP value of 97% it means that the casino will keep only 3% of the total bets made on the slot. But the RTP value works both short term and long term. In the long term, it should equalize after a sufficient number of spins.

But in the short run in can have different values, making the slot pay big or eat a lot of balance at times. For example, you play 100 spins on a $1 bet and end up losing $35. So the RTP value for those 100 spins was only 65%.

You continue to play another 100 spins and hit a bonus round which paid $250. So the promoted value for those 100 spins was 250%. You can see how the RTP changes in any given series of spins. 

This is exactly what makes slots unpredictable and fun to play. You can start playing a game and hit a bonus round in the first 10 spins which will pay 500 times the total stake and more.

But at the same time, the same game can eat away bankroll for 500 spins and pay nothing decent at all. This is all because slots are random machines and you never know what will happen.