What You Need to Know About the RNG of a Slot Machine


The random number generator, or RNG, of a slot machine determines the outcome of a game. As such, it’s important to understand the RNG before playing. There are also different types of RNG, including random number generators, wild symbols, and variations. In this article, you’ll learn more about RNGs and Wild symbols.

Random number generator

Random number generators are one of the best ways to ensure the fairness of slot machines and casino games. They work by using a computer algorithm to generate a random number that correlates with the symbols that appear on the slot reels. These random numbers are impossible to predict by humans, which makes them a great way for players to place educated bets based on probability. They are also one of the safest ways to design slot machines.

Payback percentage

A payback percentage is a measure of how often a slot machine pays out. It represents the average return on investment, but there are significant variations within any given group of machines. For example, a slot machine with a theoretical 93% payback may actually pay out only 89% of the time. This can be very misleading to the average player. It also does not take into account variances in the frequency of hits.


Slot machines come in many forms, from the simple three-reel machine to the progressive jackpot machine. Each slot machine offers different features, pay lines, and betting options. The goal of the game is to have all the reels stop on the same image or object. Players can play for free or wager real money.

Wild symbols

Wild symbols in slots come in various shapes and are used to replace other symbols on the reels. They can be either standard or unique, but their appearance is random and there are no set requirements for triggering them. They also cannot be used on the reels of slots with regular symbols, but they do come in handy sometimes. In the Guns N’ Roses slot game from NetEnt, for example, there is a special Wild called Appetite for Destruction that appears in the shape of a cross with skulls. The Appetite for Destruction Wild can appear in three positions.

Scatter symbols

Scatter symbols are special symbols that can be used in slot machines to unlock bonus features, free spins, and other exciting features. These symbols are often easy to identify due to their unique graphics and titles. These symbols are especially helpful in launching free spins bonus games, interactive mini-games, and other special features.


Minigames in slot machines can boost your chances of winning more money and provide additional excitement. They can be simple or complex, and they can be triggered randomly or during the main game. Minigames are also a good way to unlock additional features of the slot machine.