Guide to Find the Best Online Slots

The best online slots can be so rewarding that we hesitate to stray and explore the other options out there. It may be difficult to test the online slot waters, but every now and again it has to be done. In 2020 alone, there were over 3,000 new slot games released. Since then there have been hundreds more. This page will help you figure out what you should be looking for when you venture out into the big, wide, magical world of online slots.

The Best Online Casino Slots Can be Found Here


Best Online Casino Slots

Find Amazing Slots at Online Casinos

You know the feeling when you find those perfect online slots. It’s a feeling of excitement, anticipation, and satisfaction all rolled into one. Every casino player has something different in mind when they picture their favourite online slots. Whether it’s a special feature, game mechanic, bonus round, volatility, or payout percentage – there’s always something that keeps us going back for more.

Many players tend to be drawn to a couple of popular games. It’s always good to have a selection of slots to rotate between. This keeps things fresh and exciting. And, it also prevents us from staying on the same online slot for hours after it has been on a not-so-favourable streak.

But how do we find the top alternatives? It takes some research and a bit of luck. Our aim is to help you on your way to finding the best online slots to suit your preferences. We’ll also point you to the most rewarding casinos that offer the greatest slots of all time.

Tried and Tested Online Slots

Tried and Tested Online Slots

Online slot machines can be played on your computer, tablet or smartphone at any time, anywhere in the world. They work the same as land-based slots do: you deposit money, press the play button, and have fun playing the game.

It’s this simplicity that makes slot machines so popular. And since we don’t have to head down to a land-based venue anymore in order to play, it’s that much easier to enjoy the best online slots whenever we feel like it.

Let’s look at some of the biggest hits in iGaming. Placing a focus on what it is about each of the great slot machines that makes it so popular will help us understand a bit about the different features of online slots.

The most popular online slots are ranked differently for various regions. There are many reasons for this. For example, some game providers aren’t licensed to offer slots in certain countries. So, a game that is wildly popular in one region may not be very accessible in another. Themes can also be a determining factor when it comes to the popularity of slots in different regions.

However, there are certain casino games that definitely stand out from the crowd. These online slots are globally regarded as the best of the best. Players from all corners of the world flock to them time and again.

Here are some of the most popular video slots along with the game providers that created them:

  • Play’n GO: Book of Dead, Legacy of Dead, Reactoonz, Reactoonz 2, and Moon Princess.
  • NetEnt: Gonzo’s Quest, Starburst, Twin Spin, Aloha! Cluster Pays, and Dead or Alive II.
  • Pragmatic Play: Wolf Gold, Sweet Bonanza, John Hunter and the Book of Tut, Book of Vikings, and Gates of Olympus.
  • Reel Kingdom: Big Bass Bonanza.
  • Stormcraft Studios: Thunderstruck Wild Lightning.
  • Push Gaming: Razor Shark and Jammin’ Jars.
  • Red Tiger: Gonzo’s Quest Megaways, Piggy Riches Megaways, Primate King, 10,001 Nights, and Pirates Plenty Megaways.
  • Microgaming: Immortal Romance, Thunderstruck, and Thunderstruck II.
  • Relax Gaming: Money Train 2, and Temple Tumble Megaways.
  • iSoftBet: Gold Digger, Aztec Gold Megaways, Majestic Megaways, and Western Gold Megaways.

No doubt you’ve heard of some, if not all, of these video slots. You’re in for a treat if you haven’t. These games serve up everything you could ask for on a silver platter: adventure, bonuses, wild symbols, and free spins galore. These are the key aspects of the best online slots after all.

Online Slots

Pick Top Online Slots

How to Pick the Perfect Online Slot

There are a number of key factors that can influence your decision when trying to find the ideal online slot for you. The first step is to identify your priorities and then find the games that match them.

Here are things to consider:

  • Are there special promotions with different games? Online casinos offer different games at different times so it is worth keeping up to date with the latest promotions and giveaways related to different games.
  • It’s okay if entertainment is your top priority. If it is, be sure to pick online slots that offer amazing graphics and themes that appeal to you.
  • Do you want the best value for your money? Then look at the game’s Return to Player percentage (RTP) to find the one with the best statistical value. Games with higher RTPs have a smaller profit margin (for the casino) in the long run.

What the RTP Tells You about an Online Slot

An RTP tells you how much of all the money wagered on an online slot will be paid back to players over a period of time. The time period considered in the RTP calculation is in the long run and spans over millions of bets – so don’t be surprised when your slot session doesn’t pay you out according to the RTP stated.

Every slot machine has its own RTP. The RTP is expressed as a percentage. The higher the percentage, the more often you can win money over a longer period of time. However, the value is a theoretical statistical calculation that cannot be taken literally. An RTP will give you the approximate overall estimate for the slot or game in the very long run. It cannot predict the outcome of your experience.

Here are some of the best online slots with high RTP values that we can’t get enough of:

  • Fruit Million – RTP: 97.1%
  • Big Bad Wolf – RTP: 97.34%
  • Steam Tower – RTP: 97.04%
  • Jack Hammer 2 – RTP: 97.07%
  • Joker’s Luck – RTP: 97.61%
  • Jungle Stripes – RTP: 97.03%
  • Book of 99 – RTP: 99%
  • Greedy Goblins – RTP: 97.2%
  • Back to Venus – RTP: 97.07%
  • Blood Moon Express – RTP: 97.48%
  • Halloween Fortune – RTP: 97.06%

If you’re going to play online slots based on their RTPs, always review a game’s RTP once you have opened it. You can view it by clicking on the information icon once the game has loaded. This is a precautionary step because some online slots are developed with a variable RTP range.

Variable RTP ranges give online casinos the ability to set the RTP values to their liking. The best online casinos will leave the return percentages at higher values. But you will get some online casinos that do the opposite.

Fortunately, casinos that are licensed by proper authorities, such as the Malta Gaming Authority, will never set their RTP rates at less than 84%. They usually keep them much higher, even on the highest RTP setting. You can bet that the sites listed on have been vetted to validate that they are properly licensed.

What is the Volatility of an Online Slot?

The word volatility, as applied to an online slot, refers to the level of risk inherent in the game. It is used to describe how often and how much you can win during your gaming sessions. Games with high volatility can involve long periods of drought with the occasional big win. High volatility online slots also have the ability to go on a winning streak and pay out a large number of big wins in a short period of time.

On the other hand, games with low volatility typically pay out smaller wins on a more regular basis. Low volatility games mean less risk. The payouts on low volatility slots are smaller but much more frequent and there won’t be much time to get bored when playing this type of game.

Small wins pop up every few spins and you are constantly entertained by all of the bonus features and animations that are keeping your attention. That’s not to say that big wins are impossible on low volatility online slots – they can, and will, happen. Volatility is also referred to as variance when speaking about online slots.

Pro Tip: You can find out the volatility of the best online slots by checking the game provider’s website or by testing the game in demo mode. Playing slots for free in demo mode will help you determine if it pays out often or not.

Fairness of Online Slots

How the Best Online Slots are Kept Fair

There’s a myth that all online slots are rigged. Of course, you do get online slots that are offered by dubious sites. But we’re not talking about those. We recommend that you steer clear of those sites and stick to the online casinos that we recommend. The outcomes of the online slots at these safe online casinos are determined by random number generators (RNGs).

A random number generator is a computer algorithm that constantly generates a complex series of numbers that are used to determine the outcomes of slot machines and other casino games. The randomness achieved by this method is globally viewed as more than adequate for online gambling.

Tips to Win Online Slots

Tips for Maximising your Winning Potential at Online Slots

At SPCasinos, we spend hundreds of hours playing online slots. While we can’t guarantee that any of the tips below will help you win your next massive jackpot, we can tell you that we use some of these tricks when we play online.

You can use them or not, it’s completely up to you:

With reliable online casino software, the RNG is built into every single game and is always operating. Here are a few interesting facts that give some insight on exactly how RNGs ensure the fairness of online slots:

  • RNGs have been used in slot machines for decades and have improved significantly in recent years with advancements in computer technology. Nowadays they are more powerful and safer than ever.
  • The RNG generates numbers between 1 and 10 digits long, one hundred times per second.
  • Each of the numbers generated corresponds in some way to a symbol and a possible position on a reel.
  • When you press the spin button, the game picks the numbers created in that millisecond to determine the outcome of the spin.

Innovative New Online Slots

Dozens of slot machine games are released every week. Game providers are constantly developing new titles for players to enjoy. This week’s best slot game could pale in comparison to the games coming out next week because game developers are constantly creating new features and mechanics for online slots.

Some of the most recent developments in the gameplay-style of online slots include:

Cascading Wins: 

Cascading wins are also referred to as Avalanche wins. Online slots that incorporate this feature will spin again if you land a winning combination, and you don’t have to pay for the additional spin. However, you still reap the rewards if you land a winning combination on the successive free spin. Some of the most popular Cascading Wins online slots are:

  • Sweet Bonanza, Great Rhino Megaways, and Gates of Olympus – provided by Pragmatic Play
  • Gonzo’s Quest – provided by NetEnt
  • Gonzo’s Quest Megaways, Tiki Fruits Totem Frenzy, and Piggy Riches Megaways – provided by Red Tiger Gaming
  • Xpander – provided by Hacksaw Gaming
  • Rise of Olympus, Reactoonz, and Ractoonz 2 – provided by Play’n GO
  • Thunderstruck II – provided by Microgaming

When you land a winning combo on a Cascading slot, you are paid your winnings and then the winning symbols disappear to make way for new symbols that typically fall from the top of the screen.

Cluster Pays: 

Many of the best online slots that have recently been released feature the cluster pay mechanic. These slots count winning combinations based on matching symbols that land beside each other. If you’ve ever played Gems or Bejewelled then you know what we mean. Some of the most popular Cluster Pays online slots are:

  • Aloha! Cluster Pays – provided by NetEnt
  • Jammin Jars and Jammin Jars 2 – provided by Push Gaming
  • The Magic Cauldron and Gems Bonanza – provided by Pragmatic Play
  • Gemix 2 – provided by Play’n GO
  • Golden Glyph – provided by Quickspin
  • Sun of Fortune – provided by Wazdan
  • Chilli Pop – provided by Betsoft

Instead of paying winning combinations from left to right, or right to left, Cluster Pays online slots award wins on clusters of symbols.

Megaways Slots: 

Most slots offer between 10 and 100 paylines that you can bet on. Megaways slots are a completely different story. On Megaways slots, you can’t choose the number of paylines you want to bet on. The game is set with 117,659 possible winning paylines. As with all online slot mechanics, there are variations on this number. Some of the most notable Megaways online slots are:

  • Fruit Shop Megaways, Twin Spin Megaways, and Divine Fortune Megaways – provided by NetEnt.
  • The Dog House Megaways and Madame Destiny Megaways – Provided by Pragmatic Play.
  • Bonanza Megaways and Extra Chilli Megaways – provided by Big Time Gaming
  • Black Gold Megaways – provided by Stakelogic.
  • Moriarty Megaways, Royale with Cheese Megaways, and Hot Spin Megaways – provided by iSoftBet.
  • Pirates’ Plenty Megaways – provided by Red Tiger Gaming.
  • Buffalo Power Megaways and Legend of Cleopatra Megaways – provided by Playson

Megaways slots have become increasingly popular due to their sophisticated graphics and exciting gameplay.

Online Slots Megaways

Other Online Slot Innovations

There are so many different features and mechanics to discuss that we could keep the conversation going for days. If you haven’t started exploring them yet, it’s about time you do. Here are a few other prominent favourites that game developers are incorporating into the best online slots at the moment:

  • Bonus Buy feature
  • Pick Objects (in the bonus games)
  • Locked Reels
  • Mega Quads
  • Mega Clusters
  • Nudge feature
  • xNudge feature

There are so many different features and mechanics to discuss that we could keep the conversation going for days. If you haven’t started exploring them yet, it’s about time you do. Here are a few other prominent favourites that game developers are incorporating into the best online slots at the moment:

  • Bonus Buy feature
  • Pick Objects (in the bonus games)
  • Locked Reels
  • Mega Quads
  • Mega Clusters
  • Nudge feature
  • xNudge feature

Playing Top Online Slots for Free

You can enjoy all the benefits of the best online slots without risking a dime. Well, not all of the benefits. When you play for free you won’t be able to win real money. However, playing the best online slots for free is still a great way to try new games.

If you want to add a bit of spice to the party, you can play for free without depositing your own funds when you claim no deposit bonuses or no deposit free spins at online casinos. Any winnings you make while you are playing with free bonus money are usually capped.

Online casinos will commonly state that any winnings received with free bonus money or spins is limited to a specific withdrawal value. So you won’t be able to withdraw all your winnings in most cases, but it still beats playing with zero possibility of winning real money.

You could also take up deposit offers at online casinos to increase your play time and enhance your opportunity to try some of the best online slots available. Having extra funds in your account allows you to venture out a bit more – and who knows, you might find a new favourite along the way.

Casinos use bonuses as a way to entice players to log into their website and continue playing after registering. Bonuses are usually offered as a percentage of a player’s deposit but can also take the form of no deposit bonuses. Either way, you cannot simply withdraw a casino bonus as you have to wager a certain amount before you can withdraw your bonus money.

It’s the same as with no deposit bonuses; however the wagering requirements on deposit bonuses are usually lower than on no deposit bonuses.

We recommend choosing any of the bonuses on this page since we have used them ourselves and can confirm that they were totally worth it. These casinos are safe and transparent. The terms of all the bonuses offered can be found in the terms and conditions of each casino. Since they are all licensed by reputable gambling authorities, there are no hidden terms.

In addition to all the games we’ve already mentioned on this page, here are a few more of the best online slots that you’ll find at these online casinos:

  • Book of Vikings
  • Gordon Ramsay Hell’s Kitchen
  • Augustus
  • Joe Exotic
  • Buffalo King Megaways
  • Foxpot
  • Hyper Strike
  • Scroll of dead
  • Wild Chapo
  • Blazing Mammoth
  • Lucky Lady Moon
  • Cash Pig


Mobile Online Slots

All the Best Online Slots are Available on Mobile

If you like playing games on your mobile phone rather than on a desktop computer, you’ll have no trouble finding fantastic online slots to enjoy. We can easily play slots on smartphones and tablets running Android and iOS operating systems. Some of the best online casinos are also available on some Blackberry and Windows handheld devices.

Since most online casinos are totally compatible with mobile devices, we refer to them as mobile casinos when playing on mobile.

Depending on which mobile casino you choose, you may not even have to download and install any special software to play the games, deposit and withdraw, chat to customer support, or view your transaction history. Even the live dealer games are available on mobile without any download required.

There are a few online casinos out there that are staying with the download method – on handheld, desktop, and laptop devices. Some players prefer downloading and installing software, and there’s nothing wrong with that. We also enjoy it sometimes.

We have a selection of online casinos available, offering the best online slots, that provide download links for iOS, Android, and Windows devices. So have a look around the site if you’re on the market for those. Visit our Best Casino Apps page for more information.

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Aleksandra Nolan

Experienced online casino writer and reviewer who loves to share her knowledge and experience with others. She enjoys analyzing the latest trends in the industry and offering valuable tips to help others by having the most from betting at online casinos. She is constantly looking for new and interesting topics to write about and stays up-to-date on the latest changes in the online gambling industry.