Slot machines are an extremely popular form of gambling. The premise is simple: you insert a coin, pull a lever, and reap in cash rewards if the symbols on the reels align in a certain way. Slot machines test your luck and intuition, and, despite the simple rules, they are not boring in the slightest.
Slot machines use catchy music, fun graphics, and interesting symbols to hold the player’s attention. But how slot machines work? What are they made of and how do they determine when to pay out and when to disappoint the not-so-lucky players?
This article uses advanced terminology. If you are new to slots, you may want to check out our complete glossary of slot game features.
The Anatomy of a Slot Machine
So how do slots work? In order to find that out, you’ll need to go through video slot parts. When playing a land-based slot machine, you will see the following components:
Old slot machines come in a wide variety of categories. While you may see token slot machines, the tokens work the same way that coins do. If you want a slot machine only for decoration, you might be able to purchase a non-functional slot machine for a lower price than a working model. You will find five categories of rare antique slot machines.
Coin Slot/Bill Slot
This is where you put your money into the machine. You can also insert a cashed-out ticket into a slot machine and spend your winnings on additional spins.
Reels
Slot machines usually feature three or five reels, but you can occasionally come across machines with as many as ten reels! Reels are the spinning mechanisms that make the vertical positions on a slot grid rotate. Each reel has a certain number of “steps” where it could stop, and each step either contains a symbol or is blank. A typical slot machine contains about 20 stops on each reel, but this can vary.
Lever
In older slot machines, the lever would actually set the reels in motion. In modern slot machines, however, the lever just triggers the casino game’s software, which, in turn, makes the reels spin.
Play buttons
Slot machines may feature several different buttons. The most common include “Spin Reels”, “Play One Credit”, “Play Two Credits”, “Bet Max Credits”, “Cash Out”, and “Request Change.”
Coin Tray
In the past, once you would hit the “Cash Out” button, your coins would cascade out of the machine and pool in the coin tray. Now, however, it is now more common for the machine to print you a cashout voucher. These are redeemable at a redemption machine or at the cashier’s cage. Alternatively, you can insert it into another slot machine (usually through the bill slot) and go for some more spins.
Payline
The payline is the horizontal line that you can see in the center of a slot machine’s screen. In order to land a winning combination, the symbols must align on an active payline. The number of paylines available can vary from game to game, but you can only win payouts on the paylines that you place a bet on.
If there are ten paylines available, and you only bet on two of them, you can only reap those two payline’s rewards. Some machines require users to pay one credit for each payline that they would like to activate. Other machines may require multiple coins to activate a single payline.
Some slot games allow players to adjust the payline’s direction, while others are fixed. Paylines can run left-to-right or take on a zig-zag shape.
If you’re also interested in how all of these parts come together, make sure to watch this How It’s Made feature on casino slot machines:
Pay Table
A slot machine’s pay table will display all of the game’s winning combos and corresponding payouts. It will also display any special bonus, wild, or scatter symbols. Furthermore, the pay table will show the game’s current jackpot and indicate whether or not the machine is progressive. You should always check out a slot game’s pay table to educate yourself on all possible wins, payline configurations, payout odds, and information for bonus events.
Displays
Every slot machine will clearly display the basic information relevant to its users. Some common displays include:
- Credits played. This display shows the exact number of credits that the player is betting on each spin.
- Credits. This will show the player how many remaining credits they have. When the display reaches 0, the player must deposit additional coins through the coin slot in order to keep playing. Keep in mind. each credit will align with the denomination the game requires. If a player is using a 25-cent machine and inserts a $10 bill, the display will show that the player has 40 credits available.
- Insert Coin. This display shows that the slot machine is not currently activated. Anybody simply has to insert bills or coins into the machine to begin playing.
- Winner Paid. This will show how many credits were won on the previous spin, which would be added to the player’s total on the Credits display.
- Error Code. This display will only activate if a slot machine is malfunctioning. It will show a code that assists a staff member in identifying the problem.
Feel free to also watch a video guide on how a casino slot machine works below:
Types of Slot Machines
There are many different kinds of slot machines, some of which can be difficult to find. Here are some types of slots that you might come across and a short guide on how they operate.
Single-Coin Machines
These used to be very popular but are now much harder to find since most slots now accept dollar bills or require multiple coins per spin. Because these machines only accept one coin per spin, the house does not rake in as much revenue during a period of time as it would when using a multi-coin machine.
However, some old-fashioned casinos still use these types of machines. If you want a more classic gaming experience, and you want your credits to last for more spins, try out a single-coin machine.
Multipliers
Not to be confused with Multiplier symbols, a multiplier machine takes multiple coins and has a payout ratio that corresponds with the number of coins that a player uses on a spin. This type of machine was introduced in 1987 and is now the most popular type of slot machine found in modern casinos.
Multiplier machines still allow players to partake in single-coin play, but often players will choose to make the maximum bet.
Buy-Your-Pay Machines
Buy-Your-Pay machines allow players to bet between 1-5 coins on each spin. The number of coins inserted is what determines the game’s number of activated winning combos. For instance, if a player inserts only one coin, 3 “bars” would be a winning combo, but not 3 cherries. On the other hand, if they insert more coins, then both combos would be considered winning ones.
You can identify this type of machine by taking a look at the pay table. If it shows that more coins unlock extra winning combos, then you know it is a Buy-Your-Pay machine.
This kind of machine is not as common as multiplier machines. Many players avoid using them because it can be frustrating when they are just one coin shy of cashing out a great combo.
Multiple Payline Machines
Most slot machines only have one payline, which is in the middle of the game’s screen. On the other hand, a multiple payline machine has more than one active payline, as its name implies. This gives players a more exciting experience and offers more win potential.
However, players will typically need to pay an additional credit to activate each payline. When a payline is activated, it will light up.
Land-based casinos’ multiple payline machines typically offer 2-5 paylines, but sometimes more. On the other hand, online machines could have 50+ paylines!
Progressive Machines
Progressive machines are linked together by one jackpot, which can grow to gigantic proportions since it grows anytime a player inserts a coin into one of the network’s machines. When a player finally hits the jackpot symbol combination, the pool will reset. Some US gambling venues have linked together slot machines across entire states! Over the years, this type of slot machine has become very popular, since everybody wants to try their hand at winning a jackpot that would make them a millionaire.
Progressive jackpot slots have become especially popular in online casinos, and slots across various websites can be linked, as long as they use the same software platform.
Big Berthas
A Big Bertha slot machine simply refers to a machine that is gigantic and features 3+ reels. Some even feature as many as 8 reels, and each reel has 20 symbols! These machines are typically located near the entrance of a casino, to draw in attention. However, they don’t offer a great payout percentage.
Multi-Game Machines
A multi-game slot machine allows the player to switch between various games without having to sit at a different machine. For example, one multi-game machine might offer slots, blackjack, and video poker. In addition to this, multi-game machines will usually support many different currency denominations.
Other Useful Terms to Know
Hit Frequency
Hit frequency refers to how often a winning combination will land on the reels. If a machine has a high hit frequency, this means that winning combos will land more often. Machines that hit often don’t have a great payback percentage. Conversely, slot machines that have a low hit frequency will usually have a pretty significant payout rate.
Payback Rate
The payback rate, also known as payback percentage, refers to the amount of money that gamblers win, compared to how much they wager. Slot machines’ payback rates typically fall between 82% to 98%.
RNG
Each slot machine has a built-in Random Number Generator (RNG), which is an algorithm that ensures that each landing symbol is totally random and is not dependent on a player’s previous spin.
Now that you know all the details about slot machines, come try out some virtual ones at CasinoChan!
Konami’s position as a creator of innovative, visually impressive slot machines and casino games comes after a long, varied history in technology and entertainment. Starting from its simple roots, this Japanese company grew into a multimedia powerhouse with gaming divisions throughout Asia and North America.
Staying true to its slogan of “Born from Fun,” Konami develops and distributes both original creations and games based off of its popular video game licenses.
With a growing online presence and a steadily increasing list of unique slot machine features, Konami is prepared to stay competitive in the modern gaming environment.
Free to play Konami slot machines
Top five Konami slot games
Players looking to try out some of Konami’s hottest offerings can keep an eye out for the following games.
No. 1 Dragon’s Law Twin Fever: A fun, Chinese dragon-themed slot machine, featuring fivereels and 30 paylines. This game includes basic action-stacked symbols as well as a free spin bonus round. The titular twin dragons are at the heart of the game. One or two lucky dragons can arrive after any spin to drop additional wild spaces onto the reel for some surprise wins.
No. 2 Solstice Celebration: A cute, wonderfully designed slot game has a theme around the beauty of spring in an enchanted meadow. The five-reel machine features 30 paylines and uses an enhanced version of the action-stacked symbols as a bonus. Called the Sparkle feature, all action-stacked symbols are lined with a bright border. Filling two reels with a full stack of sparkle-lined symbols nudges other partial stacks to fill their reel. It also has the potential to trigger a free spin bonus round.
No. 3 Chili Chili Fire: A five-reel 30 paylines slot has a general Mexican theme. Including action-stacked symbols and the chance to win free games, this machine also uses the Fade Away feature. After any spin, low-paying card symbols have the opportunity to fade away. The newly empty spaces then fill with random higher paying picture symbols, with a chance to turn a disappointing spin into something special.
No. 4 Lion Festival: Boosted Celebration – Inspired by Chinese New Year celebrations, this five-reel slot machine offers players a mix of neat features including a boosted middle reel that has double the symbols to make forming a winning combination that much easier. It includes action-stacked symbols and a free spin bonus round, but the bonus round includes the twist of the Balance of Fortune system. After winning free spins, players can stick with their standard 2x multiplied free spins, or they can trade stacks of five free spins for a “super-free spin” with a much higher multiplier.
No. 5 Castlevania: Labyrinth of Love – Konami has multiple Castlevania themed slots, inspired by its video game franchise of the same name. This five-reel machine includes an expanded free spin mode along with a progressive jackpot tied to the Castlevania game board. Players who trigger the minigame get to pick from different sets of potential moves to try and reach the castle. At that point, the game switches to a flashy battle minigame, where players get to spin a set of reels to try and land on attack symbols that kill enemies while hoping that they avoid the damage symbols that close off the reel. Making it past the bosses can reward the player with one of the four progressive jackpots. Sadly, Castlevania machines are generally not available on a mobile device.
Konami mobile slots
While some of Konami’s more advanced machines are sadly still stuck in physical casinos, it has developed mobile versions of many of their classic slots. Players with a mobile device should be able to find free versions of Konami’s online slots available in participating casino apps. Anyone lucky enough to live where real money online slots are legal will also find real mobile versions available.
For unlucky players, Konami does offer a nice middle ground. The My Konami Slots app is available for iOS and Android devices. This app offers several popular slots for free play. Players can collect free chips throughout the day, and the app includes a daily free bonus spin that can award credits. While packages of chips are available for purchase, patient players can stick with the Konami free casino slot games.
The Konami slots app includes linked progressive jackpots and slot tournaments for players looking for high-stakes play. Konami goes back to its video game roots by also offering daily challenges and quests, which reward players for hitting set goals or betting certain amounts. The real hook is that players can win loyalty points that they can spend on prizes and comps at real casinos, similar to Chumba Casino. Players can earn room discounts, credit toward food, tickets to great shows or just themed merchandise. It’s a great way for players to have a little fun between trips.
The rise of Konami
Konami began as a jukebox rental and repair company in 1969 based out of Osaka, Japan. The name comes from the first letters of its three original officers, Kagemasa Kozuki, YoshinobuNakama and TatsuoMiyasako. The company’s founder, Kozuki, still sits on the executive board. Konami moved away from its original jukebox focus fairly quickly, transitioning to manufacturing arcade cabinets in 1973 to take advantage of the growing video game market.
Konami would go on to produce its important additions to arcade gaming by developing hits such as the massively popular Frogger in 1981, along with gamer favorites such as Scramble and Super Cobra. The company was able to adapt to the rapidly changing video game market throughout the ’80s and early ’90s, providing titles for the Atari 2600 and the original Nintendo console. Konami adapted and evolved its popular Scramble arcade game into the fan-favorite Gradius for the NES, and also developed popular franchises such as the Castlevania and Metal Gear series.
The video game division continued to grow through the ’90s and 2000s with steady sequels and developments even as the company branched out into the gambling industry. Always looking to maintain synergy between their divisions, many of these great video game properties would be adapted into themed slot machines.
Konami’s casino gaming division began with its entry into the Japanese pachinko machine market in September 1992. After several years, the company opened Konami Australia in late 1996. In 1997, this subsidiary would oversee the rollout of Konami’s expansion into the Australian gaming market and later the general Asian market.
Konami expanded into the American casino gaming market in January 2000. The move into the American market was cemented with the construction of a manufacturing and development office in Las Vegas in 2005. The 360,000-square-foot facility served as its base of operations for expansions through North America, South America and Europe. Building on the success, Konomi opened a second facility in Las Vegas in 2015.
Konami’s unique features
While Konami is known for its striking visual design, the company has introduced some software innovations to offer exciting updates to the classic slot machine design. Its development takes full advantage of the ability to modify digital reels before the game or switch symbols after a spin. As a rule of thumb, Konami has focused on enhancing standard slot machine play rather than focusing on adding separate bonus rounds. Konami’s unique twists on the slot machine formula give players a chance to see ordinary spins suddenly change into rich jackpots.
The action-stacked symbols feature
Players of Konami slots are almost guaranteed encounter its action-stacked symbols system. This feature creates sections across all the reels in a game that pick one single symbol to stack for that spin. With a little luck, players will see these sets of stacked symbols fill up their paylines for big wins.
Also, many games have separate bonus features that tie into the action-stacked symbols feature. For example, players may see the reels get nudged into higher payouts with the right set of lucky frames.
Other variations on standard play include dynamic reels that can morph after a spin. In certain games, players may see new wild symbols appear to fill out lines, or they may see low-value spaces disappear to make room for big winners.
The Balance of Fortune features
That’s not to say that Konami has ignored its bonus games, even if it sticks to traditional free spins and multipliers. When going through Konami’s catalog, players will find innovations such as the Balance of Fortune system. This offers winners a choice in how their bonus game plays out, usually based around a more certain smaller payout versus a riskier shot at a big return.
The Mirror Reels bonus feature
The addition of special Mirror reels in bonus rounds also adds a fun change of pace to free spins. Mirror reels are what they sound like, with the two leftmost and rightmost reels mirroring one another, making it easier than ever to get a straight line of five symbols.
Similarly, while many of Konami’s games feature bonus games and special features instead of traditional jackpots, some entries feature progressive jackpot systems.
Konami’s progressive jackpot games
Games such as Pirate’s Jackpot and Pharoah’s Wish include stand-alone progressive jackpots. Konami also has machines with community-linked progressive jackpots.
For example, Beat the Field offers players — in a bank of linked machines — each a chance at different progressive jackpots when one player in the bank triggers the special round. Eligible players can win set bonuses or a progressive jackpot based on the results of a simulated horse race.
Machines, such as the new Power Boost Inferno, offer a supreme progressive jackpot that can potentially be linked across multiple participating casinos.
Konami’s recent innovations have also shifted toward more noticeable changes to gameplay. In 2016, the company unveiled the Crystal Cyclone. This upgrade adds a social element to Konami’s older physical machines. The system places a roulette wheel in the center of several linked Konami slot machines.
When triggered, players on the linked machines get to watch bonus balls fall onto the spinning wheel in the center with credits and bonuses applied based on where the balls land.
Finally, Konami’s development comes full circle with the recent development of a partially skill-based Frogger game that provides increased payouts to players who can get their frog farther up the randomly generated arcade game.