
How Do Slot Machines Work?
Ever wondered how slot machines work? Learn about paylines, random number generators (RNG), and RTP to understand why slots are fair and how you can win.
Read More +There are many components to a slot machine, but perhaps the most underappreciated are the symbols. After all, what would a slot be without its symbols?
On this page, we’ll look at the symbols on a slot machine, working out what they are, why they’re used, and much more.
Quite simply, the symbols on a slot machine matter because without them, it is impossible to tell if a spin is a winning one! If you were unable to line up identical symbols on a line, what exactly would the goal of the game be? Slot machine symbols are integral to gameplay – without them, there would be no slot machines, either online or offline.
Slot machine symbols are also essential for a game’s aesthetics. Simple symbols contribute towards a game that looks and feels easier to play, while theme-specific symbols only enhance the theme in question.
Finally, some slot symbols link today’s modern games to the original titles. For example, the fruits you regularly see on reels nowadays were present when slots first came to prominence. They’ve been a constant throughout the evolution of slots, making the transition from simple slots to today’s more modern games much easier for players.
So, where did slot machines start? The first slot, the Liberty Bell, was invented by Charles Fey in 1894. It featured three reels and a single payline, plus payouts were automatic.
In terms of symbols, it featured the famous Liberty Bell, which is still commonly seen at slot machines today. It also used other classic slot machine symbols, such as playing card values and horseshoes – also symbols still widely seen. As you can see, classic slot machine symbols owe much to Charles Fey and his Victorian invention.
The next evolution in slot machine symbols came with fruit being added. Instead of offering cash prizes, companies started offering prizes of chewing gum. The fruits on the reels were used to denote which gum flavor the player won. The BAR symbol also became common in the early 1900s, as it was the logo of the Bell-Fruit Company, a popular game manufacturer of the time.
Another of the most common slot machine symbols is the 7, which has been used for decades. The reasoning behind the use of this symbol is simple: 7 is seen as lucky in many cultures, and who wouldn’t want lucky slot machine symbols spinning around when they play?
Nowadays, all kinds of slot machine symbols are used – the only limit is the developer’s imagination! So, you’ll find everything from animals to historical figures and aliens to pets spinning on the reels. And they undoubtedly help increase the attractiveness and enjoyment of the slots they’re attached to.
Slot machine symbols typically match the game’s theme, although lower-paying symbols might be more generic – for example, it’s not uncommon for fruit or playing card values to be used as low-paying symbols at online slots.
But looking further than the graphics, each slot machine symbol means something for the game. Most are regular symbols, but some have special features attached to them. Let’s check out the various symbol types below:
Symbol Type | What Does It Do? |
Regular | Most slot machine symbols don’t have a special feature attached. These regular symbols simply need to be lined up on a payline to award a win. |
Wild | The wild symbol can substitute for regular symbols to help create winning combinations. It can also sometimes come stacked or be sticky, meaning it stays stuck to the reels for a number of spins. |
Multiplier | Some symbols – often wild symbols – have multipliers attached. When part of a winning combination, they add their multiplier to the prize, usually significantly increasing it. |
Scatter | Scatter symbols don’t need to line up on a payline to award a prize. Instead, you just need to get a set number anywhere on the reels to win. Getting enough scatters also often starts a bonus feature, like free spins. |
Bonus | Many slots also have bonus symbols. These are used to activate the game’s bonus, often by landing a set number on the reels. |
You’ll find a giant range of themes at online slots, supported by slot machine symbols matching the theme perfectly. For example, some of the themes you might find include:
But in truth, almost everything can be a slot theme – and it probably already has, as you’ll find tens of thousands of slots online!
We’ve looked at the aesthetics and meanings behind slot machines, but what decides when they’ll appear? The more cynical among you might think that the casino controls which symbols land, to prevent most players from winning. However, this isn’t the case. Instead, the symbols that appear are controlled by random number generators.
Random number generators are complex algorithms built into each online slot. To put it in the most simplistic way, every time you hit the spin button, the algorithm produces a random number. This then dictates which symbols land. The casino has no control over the number produced. Also, these RNGs are regularly checked by independent third parties to ensure they’re genuinely fair.
So, next time the symbols don’t land kindly for you, don’t think there’s some kind of conspiracy. Instead, just accept that the symbols that landed were randomly decided on.
So, how do you win with symbols on a slot machine? Well, when it comes to regular symbols, there are two ways:
The scatter is the only symbol that doesn’t need to land on a payline or way to win. Land enough of these anywhere, and you’ll win a prize and/or start a feature.
But how do you know which symbols do what before you start playing? The answer lies in the pay table. This tells you all about the different symbols, including any special features attached to them, plus provides detailed instructions on how to play any bonus games. We recommend always looking at the pay table before spinning the reels of any slot.
As you can see, the symbols on a slot machine are integral – without them, there wouldn’t be slots. They dictate almost everything that happens on a spin, from whether you win a prize to whether you start free spins or another bonus feature.
It used to be the case that most slots had similar symbols – fruit, playing card suits, and the like – but that’s now all changed. While you will see classic slot machine symbols on many slots, they’re joined by a vast range of other symbols, often specially designed to match the game’s theme. You’ll find a huge range of slot machine symbols used in the games here at Slotomania – why not start playing them today to find out more?
The symbols on a slot machine all have specific roles. Most need to be lined up on paylines alongside other identical symbols to win prizes, but there are also special symbols. These include wilds, which substitute for other symbols, and scatters, which don’t have to land on a payline to award a prize. Always check the paytable before spinning the reels of a slot to ensure you understand what each symbol does.
This depends on the game. Before video slots, there were only a few symbols on the reels, as there wasn’t enough physical space for more. But with video and online slots, the number of symbols on the reels is unlimited.