Best Slot Games Online

Ziv Chen

Updated by Ziv Chen


Lee James Gwilliam

Fact Checked by Lee James Gwilliam

Senior Vice-President

Last Updated 28th Mar 2024, 09:19 AM

There’s nothing quite like the feeling of spinning reels on a slot and hoping for a big win. While land-based slot cabinets are great, online slots allow you to play on the move, with thousands of options available. But with thousands of old and new online slots available at your fingertips, how can you find the best ones? On this page, I have attempted to create a complete guide that will not only help you discover the best online slot games, but will also provide you with some cool tips for making the most of your bankroll at the best slot sites.

The Top 10 Online Slot Games

Starburst Game Logo
Software Provider NetEnt Logo
RTP 96.09%
Volatility Low
Maximum win €50,000
Book of Dead Game Logo
Software Provider Play'n GO Logo
RTP 96.21%
Volatility High
Maximum win €500,000
Sweet Bonanza Game Logo
Software Provider Pragmatic Play Logo
RTP 96.48%
Volatility Medium
Maximum win €2,110,000
Big Bass Bonanza Game Logo
Software Provider Pragmatic Play Logo
RTP 96.71%
Volatility High
Maximum win €525,000
Gonzo’s Quest Game Logo
Software Provider NetEnt Logo
RTP 95.97%
Volatility Medium
Maximum win €125,000
Legacy of Dead Game Logo
Software Provider Play'n GO Logo
RTP 96.58%
Volatility High
Maximum win €500,000
Gates of Olympus Game Logo
Software Provider Pragmatic Play Logo
RTP 96.50%
Volatility High
Maximum win €500,000
Eye of Horus Game Logo
Software Provider Blueprint Gaming Logo
RTP 96.31%
Volatility Medium
Maximum win €50,000
Fire Joker Game Logo
Software Provider Play'n GO Logo
RTP 96.15%
Volatility Medium
Maximum win €80,000
Bonanza Game Logo
Software Provider Big Time Gaming Logo
RTP 95.98%
Volatility High
Maximum win €240,000

Other Top Online Slot Games

While thousands of slot games are available online, finding the best games can be a challenge. Thankfully, I’ve done the hard work for you! My team of experts at has used their decades of experience to find the very best online slot for you to enjoy when playing at established sites and even at the best new online casinos. Check out ten of my favorites below. 

Mega Moolah – Microgaming

One of the most famous progressive jackpot slots of all time, Mega Moolah from Microgaming, has been wowing players with its sensational wins since 2006. Mega Moolah offers an RTP of 88.12% and low volatility. It's a simple 5x3 safari-themed game and remains one of the oldest slots from Microgaming that continues to dominate the charts to this day.

Immortal Romance – Microgaming

Developed by Microgaming, Immortal Romance is a vampire-themed slot that’s had its fangs in slot fans for years. The game has special features like Wild Desire, which gives you five reel Wilds, a free spins bonus, and multipliers on specific spins. You can immerse yourself in this story of vampiric romance by reading the characters’ backstories on the symbols in the paytable.

Cleopatra – IGT

Started as one of IGT’s top land-based slots in 2002, Cleopatra jumped to online casinos with its Egyptian themes in 2012. You can hit Wild symbols to boost your winnings or hope for three Scatters to trigger a free spins bonus game. Cleopatra has a minimum bet of $0.20 and a maximum bet of $100, with a medium variance, making it a solid option for all players. 

Book of Ra Deluxe – Novomatic

While Book of Ra Deluxe is one of the older games on this list, launched in 2008 by Novomatic, the Egyptian-themed game is still one of the best slots you can play. The game has an RTP of 95.10% and is high variance, which suits big-budget players. Book of Ra Deluxe also has a Gamble Feature, where you can play for more money if you hit a win. The slot will let you predict whether a playing card is red or black, and if you’re correct, you can double your money. 

9 Pots of Gold – Microgaming

Microgaming’s 9 Pots of Gold is an Irish-themed slot with leprechauns, rainbows, and lucky clover symbols to boot. If you hit three free spins symbols, you can play the game’s exciting free spins rounds with a random multiplier on all wins. As the name suggests, you’re looking to hit nine pots of gold symbols, giving you a win of 2,000x your stake. 

Big Bass Splash – Pragmatic Play

One of the online slot giants, Pragmatic Play, takes slot fans on a relaxing fishing trip with Big Bass Splash – a slot game with an RTP of 96.71% and a maximum potential win of 5,000x your stake. You can bet between $0.10 and $250 on each spin, allowing for a sensational maximum win of up to $1,250,000.00. Furthermore, a free spins round is available, which can be triggered by landing Scatter symbols. Alongside these features, there are fish symbols, each carrying a distinct value. These can be collected and stacked by hitting one or more Wild symbols.

Rainbow Riches – Barcrest

An Irish-luck-themed slot from WMS Gaming, Rainbow Riches lets you look for your pot of gold win on 5x3 reels. You can find Wishing Well symbols, which provide multipliers up to 500x your stake. There are no free spin games, but you can claim a $250,000 jackpot if you hit the correct symbols. Rainbow Riches is also well known for working well on mobile devices at mobile casinos online.

The Dog House Megaways – Pragmatic Play

If you're a dog person, then you definitely shouldn't miss this popular release from Pragmatic Play. The Dog House Megaways is a charming cartoonish-looking slot game powered by Big Time Gaming's Megaways mechanics, offering up to 117,649 paylines. With an RTP of 96.55%, a highly volatile gaming model, and a maximum win of over 12,000x your bet, it's a slot game that's not to be missed – especially for dog lovers!

Tombstone R.I.P – Nolimit City

Embark on a journey into the Wild West with Nolimit City's gritty and brutal slot, Tombstone R.I.P. This game presents 5 reels in a 2-3-3-3-1 configuration, along with 108 paylines. You can play the Tombstone R.I.P slot for as little as $0.10 or go all in with $50.00 and enjoy its 96.08% RTP, all while aiming for the mouthwatering maximum payout of 300,000x your stake. The slot offers a pack of thrilling bonus features, such as Hang 'em High Freespins, Boothill Freespins, and the Nolimit Bonus, the latter of which can take you into the free spins round for the price of 70x the bet.

Reactoonz – Play'n GO

If you're a fan of Cluster Pays slots, then you've certainly heard about Reactoonz, a slot with cascading symbols. The game features a 7x7 gaming grid, an RTP of 96.51%, and a high variance gaming model. During the gameplay, once the Quantum Leap feature is charged, you can reap the benefits of one of four features: Implosion, Alteration, Demolition, and Incision. The slot is better suited to players with a bigger bankroll looking to hit the maximum win of 4,750x. 

Compare Slots

Playing Online Slots

If like me, you find slots fun to play, then it's very easy to find online sites where to play your favorite games. The first thing to do is sign up with licensed and regulated slot sites. The best online casinos give you access to hundreds, if not thousands, of slot games usually grouped by slot theme or type. Every type of casino player will find something to enjoy.

Similarly, if you’re on the lookout for games with real money prizes, paying attention to the RTP may prove worthwhile. A Return to Player (RTP) percentage tells you how much, on average, a slot pays back to players over time. This is not a guarantee but a good measure to see how long your bankroll may last. Physical slot machines usually have an RTP between 80-90%. Meanwhile, the average RTP for an online slot is around 96%, allowing you to make the most of your money. 

Check out my recommended slot casinos below to play slots online.

Slots 643
Mobile Slots 643
Total Slot Providers 7
Mobile Slot Providers 7
Must be 21+ and present in an eligible state. T&Cs apply. Gambling problem? Call 1-800 GAMBLER. Registration Required
Slots 1112
Mobile Slots 1112
Total Slot Providers 7
Mobile Slot Providers 7
Must be 21+ and present in an eligible state. T&Cs apply. Gambling problem? Call 1-800 GAMBLER. Bonus Money Has a 1x Playthrough After Entering Deposit Code.
Slots 1008
Mobile Slots 1008
Total Slot Providers 10
Mobile Slot Providers 13
Must be 21+ and present in an eligible state. T&Cs apply. Gambling problem? Call 1-800 GAMBLER.

Different Types of Slot Games

Slots are the most popular type of online casino game, with thousands of games available. These slots fall into different categories. For example, if you’re looking for slots with the biggest potential prizes, you can play progressive jackpots, where a portion of the stake of everyone playing goes towards a jackpot anyone can win.

Alternatively, there are many different types of online video slots, including penny slots, which you can play with for as little as $0.01, and Megaways slots, which can boast up to 117,649 paylines. There are also classic fruities that simply focus on spinning reels and hitting winning combinations. Yet, we are just scratching the surface.

The best slot game for you will come down to personal preference. Penny slots may be perfect for budget bettors. Likewise, high rollers may want to try out high volatility slots, which pay out less frequently but with bigger wins. 

How We Review Slot Games

How We Review Slot Games

There are many factors to consider when it comes to selecting the best slots, including surface-level details like graphics and features. However, you also have to consider the game’s internal workings, like how often it pays out. 

Here at, I am part of a team of experts who examine every aspect of games before making our recommendations. Check out the key areas we review and what we look for below. 

  • Software Provider: While anyone can make a quality slot game, the best slot providers worldwide have built that reputation by consistently producing top-quality games. Our experts always keep an eye out for industry-leading software developers to get an idea of the quality before we dive into the game.
  • Theme: We don’t rank themes against each other (who are we to decide Vikings are better than fishing), but our reviewers look at the realization of that theme. We look at which symbols make sense, whether the background contributes, and if the bonus rounds fit with the overall game.
  • Design: Playing slot games should be as straightforward as possible, so our review team searches for slots with easy-to-use menus. We also appreciate any game with simple rules and explanations. Finally, our reviewers only consider games that have high-quality graphics.
  • Features: Most online slot games will have unique features to enhance your experience. The best slots will allow you to hit bonus rounds where you can play for free with multipliers, unique symbols, and more.
  • RTP: We look for high RTP slots that theoretically give players the best chance of stretching their bankroll over time.  
  • Volatility: The volatility of a slot determines how frequently the game pays out on average. There are benefits to playing low, medium, and high volatility slots, so our experts consider whether the volatility works with the rest of the game features during our review.
  • Mobile Capability: Many online casino players enjoy playing on the move, whether with a mobile browser platform or a native casino app. Our review team takes the time to try all of the slot games for mobile, looking for casinos that provide an optimized experience rather than a desktop game crammed into a smaller space.

How Online Slots Games Work

Online slots are essentially a digital version of classic fruit machines in a land-based casino. The popularity of land-based slot games led many world-class software companies to develop exclusive online slot games tailored to modern customers, with bonus rounds and sharp graphics. Even classic games that have been copied with online versions get a facelift with the addition of Wild symbols, bonus features, free spins, and Scatter symbols. 

So, how does an online slot work? Well, you click buttons to determine your stake for your spin and click to spin the reels. Unlike real-life slots, you don’t need to cash out your winnings specifically. Instead, you can close the game and take your profits with you. Some bonus buy slots even let you buy your way directly into the bonus rounds of the game, which is usually where all the action takes place.

Tips to Win on Online Slot Games

The crucial thing to remember is there is no way to improve your odds of winning with an online slot. These games use RNGs (Random Number Generators) so that you have the same chance of hitting winning combinations on every spin. 

However, there are ways you can make the most of your bankroll, like claiming generous bonuses. You can also consider the volatility of a slot and how it fits your budget, with low volatility best for low-budget players looking to hit frequent wins to keep their bankroll going. Other factors you can consider to get the edge include setting responsible gambling limits on your account to control your bankroll and the RTP of the slots you’re playing. 

Real Money Slot Sites Vs. Free Slots

Did you know that many of the best slot sites allow you to play slots for free in demo mode to learn about the gameplay and how to win on online slots? Bettors often overlook this fact, but it is a really interesting feature.

There are definitely times when playing an online slot for free is better than playing for real money. But it is worth remembering that the main difference between free and real money slots is potential prizes. When spinning the reels for free, it is not possible to win a cash prize, whereas a real money game will give you the best chance of boosting your bankroll.

However, both demo mode and real money games have their advantages and disadvantages. Let’s explore them in a little more detail below:

Benefits of Playing Free Slots Online

  • Play without risk: Keep your money safe and play free slot demos of the games you love. Do you sometimes like playing free slots for fun? Demos are a good option if you just want to play for fun.
  • Practice: Hundreds of new slots launch each year, and thousands of games are available. If you pick a game you have never played, demo mode is a great way to get familiar with the betting system and game mechanics.
  • Play without registering: Some online casinos allow players to access game demos without signing up for an account. This is not possible at all casino sites, so it is worth checking when you visit the casino.

Benefits of Playing Real Money Slots Online

  • Win prizes: No doubt the potential for winning money is the main reason to play a real money version of an online slot. While casino games are down to pure luck, that chance of winning is something players love to experience.
  • More excitement: Putting your cash on the line and the potential to win money makes online slots exciting. Knowing this risk and reward makes the games dramatic and more energetic than playing for free.
  • Bonus inclusion: Online slot demos are not eligible for casino bonuses. Therefore, you must play real money slots to contribute to the wagering requirement and be able to claim any type of casino bonus.

Online Slot Game Variations - What to Consider

The sky is the limit when checking out the breadth of choice in the online slot world – there are so many slot variants to choose from. Every player is catered to, no matter their budget, gameplay preference, favorite mechanic, theme choice, or bonus requirements. Of course, the best slot variation for you will depend on your personal preferences.

In fact, the sheer number of game types at the best slots sites can be overwhelming, so let’s break down the most common:

  • Classic slots: Based on the traditional three-reel fruit machines of a land-based casino, these online slots are back-to-basics games. They are known for fast gameplay and high variance, where big wins and losses can happen.
  • Video slots: These are the modern variant of online slots that offer five reels and slick graphics. Video slots no download provide immersive gameplay, including storylines, animations, and various bonuses and game mechanics.
  • Megaways: A type of slot mechanic developed by Big Time Gaming, Megaways slots have become increasingly popular online. These games dramatically raise the number of ways to win, going as high as 248,832. This essentially means the number of paylines is dynamic and can expand.
  • Progressive Jackpot: Online slots with a progressive jackpot feature a top prize that grows across a network of games from the same developers on all online casinos where the game is present. This allows the growing jackpot to reach massive amounts until someone triggers it and wins a life-changing prize.

Other Games Offered by Online Casinos

Although slots outnumber any other online gambling game category, online casinos do not rely on just slots. You will find many types of table games, live casino games (blackjack, roulette, poker, and more), and sometimes also a sportsbook for live sports betting. This also applies the other way round, where even the best online casinos for baccarat will offer a range of slots for you to play.

Meet The Author

25 Years
Ziv Chen
Ziv Chen
Writer Writer

Ziv Chen has been working in the online gambling industry for over two decades in senior marketing and business development roles. Ziv writes about a wide range of topics including slot and table games, casino and sportsbook reviews, American sports news, betting odds and game predictions. Leading a life full of conflict, Ziv constantly struggles between his two greatest loves: American football and US soccer.

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