The Simplicity of Classic Slots

Written by Boris Atanasov
With more than 4+ years of experience in the iGaming industry, Boris Atanasov writes exciting content about slots, video poker, roulette and blackjack.
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When slots were invented more than a century ago, they were simple machines featuring three reels, a limited selection of symbols, and a single payline running across the center. Players pulled a lever to start the reels, earning the machines the nickname “one-armed bandits,” a moniker still used for slots today.

A lot has changed since then. Slots have evolved into advanced, software-driven games with multiple paylines, superb animations, and a host of exciting features, such as bonus games, free spins, and wild substitution symbols.

Despite all these enhancements, classic three-reel slots have not lost their loyal following. Many casino-goers still prefer them to their flashier multiline cousins because of their simplicity and nostalgic charm. Classic slots are also a great starting point for newcomers who want to learn the ropes of this casino game. Let’s take a closer look at three-reel slots: their gameplay, odds, and features.

Themes and Symbols in Classic Slots

Classic slots typically feature three spinning reels and a limited number of paylines. Many of the earliest games pay out on a single horizontal line that runs across the center of the screen, while others incorporate several horizontal and diagonal paylines, boosting the player’s chances of winning. When identical symbols land on an active payline, the player collects the corresponding prize.

Symbols
blank Themes

Symbols

When one-armed bandits were first introduced to the general public in the US, they awarded cash prizes. Shortly afterward, the machines were outlawed, so bar and pub proprietors tried to circumvent the ban by replacing the cash prizes with confectionery items such as bubble gum and fruit-flavored candy sticks.

This practice gave birth to the traditional fruit symbols that many three-reel slots still use today. Payouts are often awarded for matching cherries, plums, oranges, lemons, and watermelons. The BAR symbol was derived from the early-20th-century logo of the Bell-Fruit Gum Company. The lucky 7 and the diamond were introduced later as top-paying symbols.

The primary function of wild symbols is substitution. They can replace other icons and sometimes carry a multiplier for an additional payout boost. In Microgaming’s Diamond Deal slot, for instance, the diamond is the top-paying symbol and also acts as a wild. If you land two lucky sevens alongside a diamond on the single payline, the game pays 100 credits for a one-coin bet, as though you had landed a combination of three lucky sevens.


Themes

Today’s developers of retro slots no longer restrict themselves to fruit themes. There are three-reel games with a wide range of themes and symbols, and Microgaming offers a large selection of classic slots, including progressives such as Cash Splash, Lotsaloot, and Major Millions. Some classic games, such as Wacky Panda and Monkey’s Money, draw inspiration from animals, while others, such as Trick or Treat, borrow their themes from celebrations like Halloween.

Gameplay, Bet Sizing, and Coin Denominations

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blank Coin Denominations
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Gameplay

Classic slots appeal to novice gamblers because of their simple gameplay. In online versions, the three reels occupy most of the screen. The paytable listing the winning combinations and their payouts is usually positioned beside or above the reels.

Below the reels are the gaming controls that allow you to adjust your bet size and spin. You can click the Bet One button once to wager a single coin or click it repeatedly to increase the number of coins staked per spin. The Bet Max button enables you to wager the maximum number of coins of your chosen denomination with a single click.

The purpose of the multiplier is fairly self-explanatory: it increases your payout by a predetermined amount. Multipliers in classic slots are not as potent as those in modern multiline games. They usually only double or triple the payouts of winning combinations.


Coin Denominations

Many retro slots support wagers of up to three coins per spin. Coin denominations vary between games, but values such as 0.01, 0.05, 0.10, 0.25, 0.50, and 1.00 are commonly offered. Games with a minimum denomination of 0.01 are often called “penny” slots.


Bet Sizing

Some classic slots, such as Betsoft’s Lucky 7, award payouts for a single cherry symbol landing on the center line, which is the game’s only winning line. The total cost of a spin depends on the number of coins you wager and their denomination. For example, if you bet the maximum of three coins at a denomination of $0.10, each spin will cost $0.30.

The cash prizes a player can potentially collect are shown in the paytable, which lists the winning combinations and the amounts they pay for bets of one, two, and three coins. Some classic slots developed by Microgaming and IGT also include features such as wild symbols and multipliers.

Maximum Bets and Jackpots

1Maximum Bets in Classic Slots

As previously explained, betting the maximum means wagering the highest number of coins the game supports. In classic slots, this is usually three coins per spin. Below is the paytable for Betsoft’s Lucky 7 game. Examine it to see whether you notice any patterns.

2Example of Classic Slots Paytable

Betsoft Classic Lucky 7 Slot Paytable
Winning Combination Payouts for 1 Coin Payouts for 2 Coins Payouts for 3 Coins
7 7 7 1000 2000 5000
3 x Lucky 7s 250 500 750
3 x Cherry 150 300 450
3 x Triple Bar 100 200 300
3 x Double Bar 50 100 150
3 x Single Bar 20 40 60
Any 2 Cherries 10 20 30
Any 3 Bars 3 6 9
Any 1 Cherry 2 4 6

As you may have noticed, all winning combinations except one offer prizes that increase proportionally and in equal increments with each additional coin wagered. For example, the payout for three Triple Bars is 100 credits for one coin, while wagers of two and three coins pay 200 and 300 credits, respectively.

The only exception is the top-paying combination of three 7s, for which there is a substantial difference between the payouts for two-coin and three-coin bets. The top prize increases by only 1,000 credits between one- and two-coin wagers, while the difference between two- and three-coin bets is 3,000 credits.

In other words, the only way to qualify for the fixed jackpot of 5,000 credits is by betting the maximum on each spin. If the cost concerns you, you can use a lower coin denomination. Otherwise, you miss the opportunity to win the larger payout. This pattern appears in the vast majority of classic slots, not only Lucky 7.

The Nudge and the Hold Features

As a rule, classic slots lack special symbols and bonuses such as free spins or “pick-me” bonus games. However, they are not completely devoid of interesting features. Some 3-reel games offer the so-called nudge feature, which is particularly useful in near-miss situations where matching symbols align on every position except one.

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The Nudge Feature

The nudge feature originated in the United Kingdom, where three-reel slots with a single payline are commonly referred to as “fruit machines.” These games randomly award one or more nudges after certain spins.

When available, the nudge can be used at the end of a round, allowing the player to move a reel one position down in an attempt to complete a winning combination. This can help the player line up the required symbols.

Suppose you line up high-value symbols across the center of the first two reels and see part of the final symbol you need in the upper position of the third reel. If the nudge is available, the symbol will move one position down to the center payline, completing the combination and awarding a payout.

The nudge functionality is also featured in certain online slots, such as NetEnt’s Super Nudge 6000. This is a three-reel slot with 5 paylines in which you must enter Supermeter Mode to use the nudge. The number of nudges you receive depends on the number of coins you wager.

You receive one nudge for bets of 20 coins, two nudges for bets of 40 coins, and a maximum of three nudges for 60-coin wagers. The credits you win are stored in the Supermeter for the duration of the feature. If your Supermeter reaches 6,000 coins or more, you automatically exit the feature and return to the base game.


The Hold Feature

Another staple of fruit machines is the hold feature. Like the nudge, it is randomly activated, granting the player one or more holds on certain spins. Exactly how the feature works depends on the classic slot you are playing.

In some games, you receive several holds that must be used on the next spin. Others award multiple holds that can be used over the next several spins. As the name suggests, the feature allows the player to hold one or more reels in place and respin the rest, potentially resulting in a winning combination.

Figuring Out the Odds of Simple Three-Reel Slots

1The Odds of Classic Slots

Simple retro slots use the same principles as their modern counterparts when it comes to odds and house edge. In other words, the odds of landing winning combinations are not proportional to the payouts those combinations award.

Early three-reel machines were purely mechanical and featured fewer symbols per reel because of physical space constraints. Players could calculate the true odds of winning as long as they knew the number of stops on each reel.

Some reel positions are blank and contain no symbols. The symbols and blanks together are known as stops. The odds are easy to calculate when you know the number of stops on each reel.

2An Example

For example, if each reel has 10 stops, the total number of possible outcomes is 1,000 (10 x 10 x 10). If the machine has a single winning combination that pays 950 to 1, the house has a clear 5% edge because players will receive only $950 for every $1,000 wagered on average.

If each symbol had the same chance of appearing and the game paid at true odds, the casino would not make a profit in the long run. To prevent this, game designers “weight” the reels so that there are fewer high-paying symbols per reel than low-paying ones.

3How Operators Reduce the Odds

In random-number-generated games, certain stops, such as blanks and low-value symbols, have more random numbers assigned to them. This makes high-value symbols less likely to appear and reduces the odds of winning the flat jackpot.

Modern video slots rely on the same principles but use virtual reels onto which a large number of symbols can be mapped. As a result, players cannot easily determine the number of possible combinations or calculate the odds.

A Smart Approach Toward Playing Classic Slots

Outcomes in both classic and video slots are completely random, meaning no strategy can help you win consistently over the long haul. You may enjoy some winning sessions but will ultimately lose in the long run because the reels are weighted in favor of the house.

Slots are designed to entertain, but you must pay for that entertainment. With that in mind, there are several smart steps you can take to enhance your playing experience, preserve your slot bankroll, and extend your gameplay.

blank Examine the paytable
blank Choose Classic Slots with Higher RTP
blank Play Slots With Higher Coin Denominations
blank Stay disciplined

Examine the paytable

Examine the paytable beforehand to determine whether a given classic slot is worth playing. The paytable also indicates whether you must wager the maximum number of coins per spin to qualify for the flat jackpot. If the jackpot is significantly higher for max-coin wagers, consider betting the maximum.


Choose Classic Slots with Higher RTP

Choose classic slots with higher payout percentages when playing online. Unlike most land-based casinos, many online gambling operators publish the theoretical returns of their classic slots. The higher a game’s RTP, the better it is for the player. Your bankroll will typically last longer if you play a classic game with a 95% RTP rather than one that returns 91%.


Play Slots With Higher Coin Denominations

Play classic slots with higher minimum coin denominations if your bankroll permits. Games with higher coin denominations often have higher return-to-player percentages, although this is not true of every machine. Do not follow this advice if your bankroll is limited, as a high-denomination machine can quickly deplete it.


Stay disciplined

Stay disciplined and set limits for each betting session. If you plan to play classic slots regularly, divide your weekly or monthly budget by the number of sessions you have scheduled for that period.

Try to keep your sessions short, because the more spins you make, the greater the chance of depleting your bankroll. It is also wise to set a loss limit for each session and quit as soon as you reach it.

Classic Online Slots That Have Stood the Test of Time

Modern video slots with sleek graphics and countless extra features are all the rage, yet some players still prefer spinning the reels of the classics. Several three-reel slots have aged remarkably well, continuing to attract purist spinners. We have hand-picked five classic slots that have truly stood the test of time. You can play them online with free demo credits or for real money.

blank Break da Bank
blank Triple Diamond
blank Grand Spinn Superpot
blank Goblin's Cave
blank Lucky 7

Break da Bank

Break da Bank by Microgaming is a classic among three-reel slots, although a five-reel version is also available. The game is popular among players worldwide and offers 5 paylines, with coin denominations ranging from $1 to $25. It includes wild symbols with multipliers and offers a flat jackpot of 2,400 credits. This equals $60,000 in cash when won at the maximum denomination.


Triple Diamond

Triple Diamond was adapted for online play by IGT, a company that initially specialized in manufacturing slots for land-based casinos. The online version is a replica of the land-based machine.

It awards payouts on 9 winning lines, but you can deactivate some of them if you wish. The online version can be expensive at some online casinos because the minimum coin denomination is $25. The game’s logo acts as a wild and helps you form more winning combinations. The wild pays for one- and two-symbol hits, but you need three symbols for all other combinations. The RTP is 95.06%.


Grand Spinn Superpot

Grand Spinn Superpot is a creation of the Swedish software studio NetEnt. This three-reel slot has more detailed visuals than the previous games mentioned, but its graphics do not diminish its classic feel.

The game has an Art Deco aesthetic and plays on a single payline, with the option to bet up to ten coins per spin. It also includes the nudge feature. You can win up to 8x the line bet with the wild multipliers featured in Grand Spinn Superpot. The maximum jackpot is 10,000x your bet level.


Goblin's Cave

Goblin’s Cave is one of the classics in Playtech’s catalog. A distinctive aspect of this 3-line slot is its hold functionality. At the end of each spin, the player can select which reels to hold. The selected reels remain in place while the others respin. Coin denominations range from $0.01 to $5, with the option to wager up to five coins per payline.


Lucky 7

Lucky 7 is one of the few classic slots developed by Betsoft, a company known for its 3D games. It closely replicates the straightforward experience of classic slots, as it uses a single payline running across the center of its three reels.

Winning combinations use the standard set of lucky sevens, cherries, and single, double, and triple bars. Matching combinations occur quite often for a single-line slot, but most wins offer low payouts that return even money to the player. The maximum jackpot of 5,000 credits is awarded for a three-coin bet and a combination of three sevens.

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