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Best Online Slots 2024 — Top Casinos to Play Slots for Real Money

Author: Aaron Jones | Fact checker: Steven Madden · Updated: 2024/05/13

Slots stand as the pulsating heart of the casino experience, both online and off. These dazzling machines, with their spinning reels and captivating themes, offer a simple yet enthralling gameplay that appeals to a wide audience.

From the classic fruit machines to the latest video slots featuring cutting-edge graphics and soundtracks, slots promise a whirl of colors, excitement, and the chance for significant payouts. They encapsulate the essence of gaming - a blend of luck, entertainment, and the perpetual allure of the next big win.

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Free Slots vs. Real Money Slots

At an online casino among the online casino games, you have a choice of real money and free online slots for your online gambling experience.

Here are the differences between the two.

Real Money Slots

Just as the name suggests, real money slots are titles where you play with your cash balance. Therefore, you should have some cash when you start the game. Here are some features of the slots.

Bonuses and other Incentives

You can use promotions, loyalty programmes and other offers on real-money slots. These bonuses are not available with the free versions. These incentives are made to increase the player’s bankroll and provide opportunities to increase their income.

Competitive Elements

Real-money slots also have an element of competition. In some games, players outcompete opponents to walk away with the ultimate prize. On the other hand, tournaments have leaderboards where the winner takes home the largest share of prizes.

Enhanced Gaming Experience

The intensity of real-money slots heightens the overall gaming experience. The stakes involved create a more immersive atmosphere, which appeals to players who enjoy the adrenaline rush of gambling. Different features make the game enticing, with the potential win creating anticipation.

Progressive Jackpots

Real-money slots give access to progressive jackpots. Here, the prize pool accumulates over time. Most players are attracted by the prospect of winning substantial, life-changing amounts. Some slots also have smaller fixed jackpots with modest amounts.

Potential for Wins

Real-money slots give you a chance to win some cash. There is the thrill of placing bets and winning real money that you can spend. Every winning spin, payline and combination actually adds cash to your balance.

Free Slots

If you do not wish to spend cash on slots, you can play free or demo versions. Here are some features of these slots:

Risk-Free Enjoyment

Free slots offer a risk-free experience. They allow you to enjoy the game without worrying about losing money. You use virtual credits to play and you enjoy all the features as you would when playing with real money. No need to put in personal and financial information.

Casual Exploration

There is no financial commitment for the free slots. Players are able to casually explore a wide variety of games. Since there are thousands of slots out there, players are able to try each reach-free, in the meantime discovering preferences without constraints.

Skill Development

Free slots provide a platform for skill development and strategy refinement. You are able to think and implement strategies without the risk of losing your cash. They offer a perfect opportunity for beginners who want to enhance their gaming abilities like they would if they tried free trials of classic table games.

Stress-Free Gaming

If you wish to spend some free time, you can try some free slots. They give players a chance to unwind and have fun without financial stress. Therefore, they are an ideal choice for those seeking a relaxed bonus games gaming experience.

No Monetary Losses

One of the major demerits of the online gambling industry is the potential loss of money. However, with the free slots, the absence of real money eliminates the possibility of monetary losses. As a player, you focus solely on the entertainment aspect.

Types of Online Slot Machines

You will find several types of slot machines in your online casino. Each type has distinct features that separate it from the rest.

Some of the features are there for enjoyment, but there are several meant to increase your earning potential. Some of the latest casinos separate them according to categories so that you are able to find a preferred one with ease.

Below are some of the popular types of slots and their distinct features.

Fruit Machines

Fruit machines are also known as classic slots. Just as the name suggests, they pay homage to the traditional slot machines with fruit symbols like lemons, bananas, cherries and watermelons. One striking feature of the slots is that they feature simple gameplay.

They usually come with three reels and a nostalgic design that appeals to players seeking a retro casino experience. You will also find a few pay lines and features compared to others in this list. We recommend the titles to people who need a stress-free gaming experience or are just starting out.

5 Reel Slots

5 reel slots are an upgrade from the traditional fruit slots. They represent a modern evolution of traditional slot machines. This is because with five reels instead of three, you get access to more paylines and increased opportunities for winning combinations.

In addition, the titles come in various themes, such as Egyptian, movie-based, water, fishing and mythical. They also incorporate animations, advanced graphics and bonus features to enhance the overall gaming experience and increase the earning potential. 5 reel slots are the most common types of slots in most online casinos.

Progressive Jackpot Slots

Progressive jackpot slots take excitement to the next level by linking a network of games to a shared jackpot pool. A small portion of each player's bet contributes to the jackpot, which can grow to massive amounts. This amount keeps growing until there is an actual winner of the said amount.

These slots offer a chance to win life-changing amounts while offering a thrilling gaming experience. Besides, they have most of the features that you would find on 5-reel slots. Other slot types in this section may sometimes be progressive if the jackpot keeps increasing.

Mobile Slots

A good number of players play with their phones. Mobile slots cater to the on-the-go lifestyle of modern players. The titles are accessible on smartphones and tablets, where they deliver a seamless gaming experience with user-friendly interfaces and touch-screen controls. Many are accessed either through apps or via web browsers. They give a similar thrilling experience to that of the computer-based titles.

Just like their desktop counterparts, mobile slots come with various themes and features. Therefore, players do not lose the opportunity for enjoyment when they play on mobile devices. Players can enjoy their favourite games anytime, anywhere, whether for free or with real money.

Multiplier Slots

Just as the name suggests, multiplier slots multiply your earnings when you meet certain characteristics, such as hitting a specific symbol combination or triggering the free spins mode. The multiplying factor increases the base win with the said figure. For example, a 5x multiplier gives players five times the base win. This can potentially bring in huge payouts.

Most casinos will include details about multipliers in the game information and provide details of when they are activated. Check your favourite game for such features. You may also try the titles for free to see how such multipliers are activated.

Mega Spin Slots

Mega Spin slots have an added twist over the traditional spinning reels. Here, players can spin multiple sets of reels simultaneously. Since each reel has the potential to win them some cash, playing several together increases the chance of multiplying both the excitement and potential wins. Other times, several spins happen simultaneously, mostly free spins, increasing your winning potential.

Some mega spins use the increasing symbol feature. After playing a given number of spins, the symbols increase by a predetermined number. This increases the potential wins rather quickly, as there are more symbols to complete the winning combinations.

Multi-Payline Slots

Multi-payline slots offer players numerous ways to win. Each payline has the potential for a win. The paylines are symbol combinations in a predetermined pattern. For example, there could be a payline that pays diagonally, right to left, in a zigzag manner or crisscrossing.

Many slots do not give you a chance to change the number of paylines available. However, some do with the options at the bottom of the screen. Where the option to determine the number of active paylines is available, you reduce them according to your bankroll, although you may miss some potential wins.

How to Play Online Slots

Playing online slots is rather straightforward and does not require prior training. You just need to visit your favourite casino, pick a slot you would like to play, read its information section and start playing.

The spinning function is similar across slots, although you may find different features in some titles. You can play slots for free or with real money.

Besides, you do not need to download anything to play slots. Just click on your favourite title and start enjoying it.


Choose a Reputable Casino

Select a trustworthy online casino that offers various slot games. The ideal casino should have the necessary licences and offer a secure gaming environment. You can tell this by checking user reviews and reviewing sites such as ours. It should also be accepting players from your jurisdiction.


Register an Account

Sign up at your preferred casino by providing accurate information. This information may include your name, location and preferred currency. Verify your account through email or phone. Most casinos will just send a code or a link to your phone or email.


Deposit Funds

Deposit money into your casino account using a preferred payment method. You may need to pick the method in the cashier section. Many casinos offer welcome bonuses that can enhance your initial deposit. Check if it is a good offer before claiming it.


Select a Slot Game

Browse the casino's slot library and choose a game that suits your preferences. Consider themes, features, and paylines before starting your play. You can try a few games free before you play with real money. Remember, you cannot play free if you have already claimed a deposit-based welcome bonus.


Place Your Bet and Spin

Set your bet amount and spin the reels. Some titles allow you to set automatic spins, while others have options for adjusting the paylines. Where the second option is unavailable, adjust your bet sizes accordingly. Besides, monitor your balance and watch for winning combinations. Also, familiarise yourself with the game's rules.

Selecting the Best Online Slots

Several factors contribute to a potentially rewarding slot gaming experience. You should understand these factors to make informed choices that maximise your enjoyment and increase your moneymaking potential.

Return to Player (RTP)

RTP, or Return to Player, represents the percentage of wagered money that the slot is programmed to return to players over time. Higher RTP percentages, often above 95%, indicate better potential for regular payouts.


Consider whether you prefer the chance at a life-changing sum or smaller, more frequent wins. Pick a size and type that best meets your needs and preferences.

Bonus Features

Some of the popular bonus features include free spins, multipliers, gamble mode and interactive mini-games. They all provide additional opportunities for winning and entertainment.

Volatility and Variance

Low-volatility slots offer frequent but smaller wins. High-volatility slots, on the other hand, may have larger payouts but are less frequent. Choose slots with volatility that align with your risk tolerance.

The Best Slots of All Time

There are several amazing slots online. Here are five of the best ones.

Book of Ra

Book of Ra is a Novomatic slot title. It is known for its thrilling Egyptian theme. Players get to explore ancient ruins for gains. Players love its free spins and a special expanding symbol as they embark on an adventurous quest for treasures. There are nine paylines on the five reels, with a maximum win of £25,000.

Book of Dead

Play'n Go's Book of Dead takes players on an ancient Egyptian expedition. It explores their underworld for rich gains. The slot features a free-spins mode and an expanding symbol. It also has immersive gameplay and a top win of 5,000 times your bet. There are also reasonable bet ranges, with a minimum bet of 0.10 and a maximum of 50.00.

Big Bass Bonanza

Pragmatic Play's Big Bass Bonanza offers a refreshing take on fishing-themed slots. It has scatters, free spins mode and retriggers that increase your wins exponentially. Scatters determine the number of free spins you get. The slot has ten paylines and a 2100x maximum payout. It is also a medium-volatility slot. Therefore, there is a chance you will win some cash from time to time.


NetEnt's Starburst is a cosmic sensation with its dazzling jewels and vibrant colours. This simple title offers frequent payouts and expanding wilds. Stick wilds also increase your winning combinations. The slot has achieved legendary status among slot enthusiasts. Three are free spins and retriggers that offer up to 250x your bet. You can bet between £0.10 and £100.

Age of the Gods

Age of the Gods is a slot series by Playtech that combines mythology with stunning visuals and progressive jackpots. It features various titles, like Zeus and Hercules, the mythological gods of the ancient Greeks. Players love these slots for their diverse bonus features and potential life-changing jackpots. Each title has unique features and possible wins.

Slot Mechanics and Strategies

You can increase your chances of winning a slot if you understand how it works and develop strategies to win it. Learn more about this in the section below.

Basic Mechanics Every Slot Machine Has

You should understand the mechanics to increase your winning potential.

Check on the following:

  • Random Number Generation (RNG): RNG creates random outcomes for each spin. This ensures fairness and unpredictability in results.
  • Reels and Symbols: You match symbols across predefined paylines to make winning combinations.
  • Paylines: Paylines are predefined patterns for determining winning combinations. Players win when they match symbols along these lines.
  • Volatility: Volatility (or variance) reflects the risk associated with a slot.

Slot Strategy: How to Win at Slots

Here are some key tips on how to increase your chances of winning at slots:

  • Bankroll Management: Set limits on how much you are willing to spend before you start playing to help you avoid significant losses.
  • Game Selection: Diversify your game choices. Experiment with both high- and low-volatility slots to find what suits your preferences.
  • Bonuses: Take advantage of welcome bonuses and promotions offered by online casinos. They can boost your initial bankroll and provide more opportunities to play.
  • Understand the RTP: Check the Return to Player (RTP) percentage of the slot you are playing.

What is RTP (Return to Player Percentage)?

RTP represents the percentage of wagered money that a particular casino game is expected to return to players over time. A higher RTP indicates a greater likelihood that players will receive a large portion of their wagers back as winnings.

For example, if a slot machine has an RTP of 96%, it means it pays back 96% of the total bets placed over a substantial number of spins. The remaining 4% represents the house edge or the casino’s cut.

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The Best Slot Game Developers

Here are five leading slot game providers.


Microgaming was founded in 1994 on the Isle of Man. It is one of the earliest and most respected slot providers. It boasts over 300 titles that cut across various themes and features.

The casino is known for its progressive jackpots. It has appealing titles like Mega Moolah, Major Millions and King Cashalot. Mega Moolah has the highest payout in the industry and is the most frequent of all titles in the same range.

Net Entertainment

Net Entertainment is a Swedish gaming software. It is home to some of the world’s best-loved slot machines. The software provider has made a name for having slots with many features and themes. Themes range from blockbuster movies to mythical, ancient and everything in between.

This provider has several breakout titles, led by Starburst, Gonzo's Quest, and Divine Fortune. Gonzo’s Quest stands out. It focuses on Gonzo as he travels by sea to find the magical city of gold.


Playtech is another software developer based on the Isle of Man. It is known for offering games that are serious, where some features are interconnected. Many of its slots have stunning aesthetics and realistic graphics.

The Age of Gods series is the most standout series from the provider. Among the series, Age of the Gods: King of Olympus is the most stunning one, as it shows Greek mythology in a fun and accurate way.

Play'n Go

Play'n Go is a Swedish gaming software developer that has been around since 1997. It is known for making mobile-friendly titles that are aesthetically appealing due to their distinct graphics. Currently, the provider has over 100 titles.

The most popular among them is The Book of Dead. This slot follows a man as he explores the ancient Egyptian ruins for winnings. Its striking display of ancient Egypt and easy wins make it a popular slot among players.

Pragmatic Play

Pragmatic Play has been available since 2015. It has a wide collection of mobile and crypto-friendly titles and leads the way for fair gaming and RNG assurance certification. Its games are aesthetically appealing, with many having realistic features.

One of the leading games from the provider is Big Bass Bonanza. The slot is fishing-themed and offers a maximum win of over 2000 times the bet amount. In addition, it has wilds, free spins and other winning features.

Special Features and Bonuses in Online Slots

There are various bonus features available to players in slots. They may vary from one title to another, but they provide similar results. Below are some of these features:

  • Bonus game: A bonus game is similar to a free spin mode in that you are allowed to play an extra round without a deduction on your balance. This game usually has a higher win amount than real-money rounds.
  • Free spins mode: The free spins mode allows you to play a given number of times without using your real money. Most games hide their highest wins and jackpots in this mode, while others allow you to buy in the free spins directly.
  • Gamble mode: The gamble mode gives you a chance to double your wins by choosing between colours or shapes.

The Advantages of Online Slots Over Ground Casino Slots

Online casinos have several advantages over ground-based ones, as shown below.


Online slots provide unmatched convenience. Players can access their favourite games from the comfort of their homes.


The online environment offers a vast array of slot games. Players can explore themes, graphics, and features that may not be as readily available in ground casinos.

Technology Benefits

Online slots leverage advanced technology, which results in enhanced graphics, realistic images, more secure payments, great sound effects and interactive features.


Players have 24/7 access to lots of games. This accessibility ensures that individuals can enjoy their favourite slots whenever they please, without any restrictions or time limits.

Bonuses and Promotions

Online platforms often provide enticing bonuses and promotions. They include welcome bonuses, free spins, gambling modes and loyalty programmes.

Time Efficiency

Online slots allow players to optimise their time. They do not need to wait for physical machines and can swiftly switch between games.

Mobile Slot Gaming

Early slots were based on computers. They were to play on large monitors. However, as technological development took pace, most people owned and started using portable devices for their computing. Casinos were trying to capture this market.

Mobile slot gaming allows players to play on the go on their devices. They are compatible with the operating system and can run on a small screen.

Mobile slots run either on apps or on web browsers. You download the former, but just log in to play them on the latter. You have to download an app that is compatible with your device’s operating system. However, any browser can work with slots.


Slots are the most popular games in casinos. They come with different features and have immense winning potential.

There are over four dozen slot software providers and some have stood out over time. You can play slots for free or with real money.

Most casinos also provide bonuses that you can use to play your favourite titles. Besides, while most of them are games of chance, you can increase your winning potential by implementing some strategies and learning how the games work.

❓Slots FAQ

❓What are the different types of online slot machines available?

There are several types of slots available on the market. Some of the popular ones include fruit slots, 5-reel titles, multiple paylines, jackpots and Megaways. You will also find additional classifications, such as bonus buys, in your casino. Your choice of any of these depends on the expected fun, winning potential and risk appetite.

❓How can I start playing online slots?

To start playing slots, you need to visit your favourite casino, sign up for an account and make your first login. Then, visit the games lobby and pick the slot that you intend to play. You can then play it for free. However, if you wish to play with real money, make a deposit before you select a slot.

❓What should I consider when choosing an online slot to play?

Consider such factors as the RTP of the slot, the maximum pay or the jackpot value of a lot when selecting it. You should also check its volatility and features, such as wilds, scatters and bonus mode. It is also worth knowing the wager values accepted as well as the number of paylines available. Balance between enjoyment and potential wins when making the selection.

❓Can online slots be played for free, and what are the differences compared to playing for real money?

You can play slots free. However, they differ from real-money gameplay in many ways. First, you cannot withdraw your winnings when playing free. Second, you can only use bonuses and other promotional cash when playing with real money. Third, free mode has no risk of losing cash even if you lose the game, unlike the real money ones.

❓How do slot machines work, and what does RTP mean?

Slot machines have reels that spin. On top of the reels are symbols arranged down the spin. When the reels spin, these symbols move down. If adjacent symbols are the same in a specified pattern, the player wins.

RTP represents the percentage of wagered money that a particular casino game is expected to return to players over time. A higher RTP indicates a greater likelihood that players will receive a large portion of their wagers back as winnings.

❓Are online slots fair and how is fairness ensured?

Slots are fair. The casino does not have any opportunity to manipulate the results. This is because the RNG software determines the symbols, features and winnings. RNG software code is not available to the casino. So, it cannot use it to its own advantage. The games are also audited from time to time.

❓Can I play online slots on my mobile device?

Yes, you can play online slots on your mobile device. Most of the slots currently available on the casino are available for both desktops and mobile devices. Just visit your mobile browser and log in to your casino to play. You can download an app for your casino, if available and play your favourite slots.

❓What are the best strategies to win at online slots?

While slots are games of choice, you can increase your winning potential by expertly managing your bankroll to last long enough for a win to be released. You should also pick a game whose volatility matches your risk tolerance. In addition, consider trying games free to learn about them before you spend your cash on them.

❓How do I identify the best online casinos for slots?

Go for casinos that have licences from reputable jurisdictions. Check user reviews to determine if it has fair gaming practices and rules. You should also check the number of available slots and if there are bonuses, you can use them to play slots. Besides, software providers also give an indication if the casino is legitimate.

❓Are there special bonuses available for online slot players?

Most casinos have special bonuses for their slot players. These bonuses include welcome offers, reload bonuses and tournaments. Be sure to check the terms of each offer before you pick it so that you are sure you can meet them. Then, play them at the appropriate slots to take home the wins.