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Guide to Understanding Slot Machines - Maximize Your Slot Game Play

We cover every aspect of slot machines. Ranging from the first slot machine, to how they are played in modern times, and everything in between.


A row of lit slot machines in a casino hall
Slot cabinets in a row, reels and buttons litPhoto: FolsomNatural · CC BY 2.0
On this page — 5 sections
  1. A Brief History of Slots
  2. Slot Machine Categories
  3. How a Slot Machine Works
  4. The Case for Online Slots
  5. Slot Machines: Strategy VS Myths
Slot Machines

If you've ever set foot in a casino or logged onto a virtual gaming site, there's a strong possibility that you've tried your luck at a slot machine. These games are the lifeblood of the gambling industry, offering spinning reels, dazzling graphics, and the chance for a major payday.

While slots don't allow for much in the way of strategy, that hasn't stopped players from flocking to them in droves. Just walk into any casino in the world and you'll notice a disparity between slots and other games of chance, as the former often take up the bulk of the floor space allotted for gambling.

This article is meant to examine the basics of slot machines, from how they work to their colorful history. We'll also discuss possible strategies for getting the best return on your wagers, as well as dispelling some of the most common myths that a surprising number of players continue to cling to.

A Brief History of Slots

In 1898, Charles Fey produced a device called the Card Bell. Using painted symbols inspired by playing cards, it would soon give way to a more patriotic version known as the Liberty Bell. Fey made money by renting these machines to bars and taverns, taking half of the winnings. The machines were a huge success, and Fey received numerous offers from various companies wanting to acquire the manufacturing or distribution rights. After he declined, they looked for someone else who could replicate the machines.

In 1907, a Chicago inventor named Herbert Mills created a similar slot machine called the Operator Bell. This was the first game to use fruit images, and it soon enjoyed a presence in bars across the US. Interestingly, it's worth noting something fun here. In some states, winners received coins as prizes. However, in states where gambling was illegal, payouts often consisted of food, alcohol, or cigars. Mechanical slots lasted for ages, but the industry took a leap forward in 1963 when Bally introduced the first electronic game. Its success was immediate and it would soon dominate the casino scene.

The first video slot was introduced at the Las Vegas Hilton in 1976, and it quickly spread around the world. Unbelievably, a decade later the first progressive jackpot game was introduced, and that's when the appeal of slots began to skyrocket. Less than a decade later, another breakthrough came when Microgaming Software created the first online casino. Slots have been an integral part of this growth, and they remain the top source of casino profits - both virtual and land-based - to this day.

Mechanical slots continued for decades, but the industry took a major leap forward in 1963 when Bally introduced the first electronic version of the game. Its popularity was immediate and it would soon dominate the casino landscape.

The first video slot appeared in the Las Vegas Hilton in 1976 and quickly spread around the world. A decade later, the first progressive jackpot game arrived on the scene and the popularity of slots began to skyrocket.

Less than 10 years later, another innovation came when Microgaming Software created the first online casino. Slots were an integral part of this development, and they continue to be the largest source of casino revenue, both virtual and land-based, at the time of this writing.

Slot Machine Categories

Whether you enjoy playing slots in a brick-and-mortar casino or in the privacy of your own home, you will encounter several types of games to choose from. They may all seem the same at first glance, but reading this section should help you understand the differences. Keep in mind that some games fall into more than one category.

  • Video Slots Instead of old-fashioned physical reels, this modern slot uses computer technology to create digital simulations. This allows for a wide range of effects, including animated reels and scenes from movies and TV shows. All modern games fall into this broad category
  • Reel Slots This category includes slots with physical reels. While these are no longer manufactured for casinos, they were once the most common option for gamblers. Today, they are only purchased by collectors.
  • Single-Line Slots This unadorned type of slot machine features a single payline. Such options are becoming increasingly rare as advancing technology makes the creation of multiple paylines an inexpensive option. multi-line slots This version has replaced the single-line slot and offers anywhere from 3 to 50 paylines (and even more in rare cases). These games typically pay from left to right, although more exotic options may allow for inverted paylines. In addition to the usual straight across pay pattern, multi-line games also include payouts for diagonal and zigzag matches, as well as other more unique patterns.
  • Straight Slots Cash prizes are awarded according to a pay table. The most common type of slot machine, these games often include additional incentives such as bonus rounds, wild symbols and scatter pay symbols.
  • Progressive Slots When a customer plays this type of slot machine, a percentage of their bet is added to a progressive jackpot that continues to grow until someone hits the symbols necessary to win it. At this point, the jackpot resets to a predetermined base and begins to grow again. Progressives are categorized as: stand-alone (a single machine), proprietary (machines within the same casino share a jackpot), and wide-area (machines are connected across states or gaming platforms). These jackpots can make someone an instant multi-millionaire, and some of the largest payouts have been in the $30 million range
  • Jackpot Slots This type of game pays a top prize if the player gets the right combination of symbols. Given the fierce competition among game developers, it is unlikely that you will find a game that does not fall into this category.
  • Bonus Round Slots In addition to the regular prizes offered on the reels, a player can unlock one or more bonus rounds by getting a certain combination of symbols. Some bonus rounds offer nothing more than free spins, while others offer cash bonuses, prizes and even progressive jackpots.
  • Multi-Spin Slots After the reels come to a stop, the player has the option of spinning again while holding one or more of the reels from the previous spin. This greatly increases the odds of a big payday, which explains why the paytables for these games are often lower than other machines.
  • Buy-a-Pay Slots A slot machine in this category contains multiple paytables, each more lucrative than the last. In order to play on the better tables, the customer is asked to make more substantial bets.
  • Multi-Denomination Slots Instead of being limited to a single denomination when you spin, this type of machine allows you to vary the size of each bet. Almost all modern slot machines fall into this category;
A dealer's hands laying out cards on a blackjack table
A live blackjack table mid-hand, the dealer's cards face upPhoto: Frerk Meyer · CC BY-SA

How a Slot Machine Works

The driving force behind modern slot machines is the Random Number Generator. This piece of technology is present in both online and land-based slots and ensures that each spin is independent of all others.

Definition of: A Random Number Generator
A Random Number Generator is a function object that can be used to generate a random sequence of integers. That is: if f is a Random Number Generator and N is a positive integer, then f(N) will return an integer less than N and greater than or equal to 0.

As soon as a machine becomes active, the RNG begins constantly generating numbers at a rate of hundreds or even thousands per second. When a player places a bet and presses the spin button, the latest batch of numbers is used to determine which symbols appear on the reels.

This means that the spinning reels provide nothing more than a visual indication of which numbers have been selected by the random number generator. Once the button was pushed, the outcome was determined faster than the human mind could process.

Some symbols on a slot machine appear more often than others, which means a game is "weighted". This is common to all slot machines, otherwise the big symbols would appear more often and the casino would surely end up losing money in the long run.

Slots are also programmed with a certain payback percentage, which is the amount that will be paid back over the life of the machine. For example, a 98% payback slot machine can be expected to return 98 cents for every dollar wagered, although this can vary widely in the short term.

The Case for Online Slots

Some players still prefer to play on a physical machine, while a growing number swear by the virtual options offered by online casinos. If you have never tried the latter, here are a few reasons why you might prefer the experience:

  • Cheaper While the game itself may cost just as much to play, you do not have to leave your home to enjoy an online slot machine. That means you end up saving money on gas, airfare, hotel accommodations, and food
  • Avoid Cigarette Smoke People who don-t smoke often complain about the stench in some land-based casinos, but that-s never an issue when you play online. If you are particularly obsessed with air quality, you can even crank up your humidifier while you play online.
  • Free Play Most online casinos offer free versions of their games for practice and fun. I have yet to see a free slot machine in Macau or Atlantic City.
  • Privacy If you play at a casino near your home, you may have to worry about running into nosy neighbors. This is never an issue when playing online, as you can lock the door, draw the blinds, and keep the neighbors in a perpetual state of suspense
  • The Sound of Silence Real-life casinos are distracting with their chatty patrons and noisy slot machines. For some, it can be an overwhelming experience. You never have to worry about such distractions when you play at home.
  • Instant Access There is nothing worse than walking into a land-based casino and finding that someone else is already playing your favorite slot machine. And even when you finally get to the game and manage to win, you may still have to stand in line at the cashier. When you play online, all the games are just a few clicks away, and any winnings are automatically deposited into your account;

Slot Machines: Strategy VS Myths

It is important to note that there is no strategy for consistently beating slot machines. These games are completely random, so you may win big one session and lose it all the next. However, there are a few things you can do to maximize your time in front of the slots.

  • Play as slowly as possible to enjoy the experience and minimize your losses
  • If you are playing at a land-based casino, always make sure to get your ticket when you leave
  • Otherwise, you will not be able to withdraw your winnings
  • Never play slots at a land-based casino without a player card. This can lead to a lot of comps, which are freebies on everything from food to hotel accommodations
  • Simpler games tend to offer better odds to the player
  • Avoid getting drunk while playing
  • Always play the lowest denomination you feel comfortable with.Whenever you play a game with a skill feature, always follow the advice printed on the screen or on the side of the machine
  • Research casinos and online software designers to find those with the best payback percentage
  • Try video poker instead, as it is a more profitable option
  • Playing a higher denomination tends to improve your overall odds on the machine;
There are lots of superstitions and misconceptions about slot machines floating around, and the ones listed below are some of the most common.
  • If you watch a slot machine long enough, you can begin to predict patterns on the reels
  • Slots pay out in cycles. Once a cycle is complete, it starts over again.
  • If a machine hasn't paid a jackpot in a while, it's about to hit.
  • The most profitable slots are always placed together on the casino floor.
  • If a slot machine has a handle and a button, you're more likely to win if you pull the handle.
  • People who sell slot machine systems have made millions by using these strategies in casinos.In land-based casinos, the slots with the highest payback percentage are often located near the front door and other entrances to the casino. Pressing the spin button at the right time increases your chances of winning;
Conclusion
Slot machines are the kings of casino gaming, and both land-based and online establishments draw the bulk of their profits from these devices. Unfortunately, their odds always favor the house, and there's no way to consistently turn a profit while playing these games of chance. The best recommendation I can give is to focus on enjoying your time in front of the spinning reels, and look at any profits gained from a session as an added bonus.
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