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Slots Online 2020 - A Guide to the Multi-Reeled Game

If there is one game that never fails to bring out players in their droves, it’s slots. Slots are so popular among casino players, that you can find slots online in all shapes, sizes and themes imaginable. Navigating through such an overwhelming abundance of slots can be tricky. Here, at CasinoTop10, we have shortlisted the best slots casinos by taking several factors into consideration. We will delve into everything you need to know to play the best online slots games!

Why Play Slots Online?

  • Simple Slots Rules – Slots are the easiest game to play compared to other online casino games;
  • Variety - There are much more variations of slots games online than at brick-and-mortar casinos and you can find various slots online with diverse features and themes;
  • Casino Bonuses – You have a wider selection of slots bonuses you can claim which would boost your bankroll exponentially.

Playing at the Best Slots Casinos

The internet is bursting with online casinos offering a range of slots games or even dedicated entirely to slots online. We can class them into three types of casinos: the good, the not so great and the ones you should definitely steer clear of (unless you want your money to disappear faster than a rabbit into a hat at a Las Vegas magic show). You can get easily confused wading through an endless sea of choices.

When you find yourself asking what online slots pay real money, rest assured our team of gambling experts will guide you to find the best slots online. If any of our listed online casinos tickle your fancy, you will find in-depth details in our casino reviews of what you will find at your chosen casino site. On top of that, we give you the opportunity to secure yourself an exclusive online casino bonus simply by signing up through us.

4 Tips to Choose Where to Play Slots Online

1) Pick a Casino with the Widest Selection of Slots Games

Slots are globally the most popular casino games. This is the case in land-based casinos worldwide and online. A major factor is the variety of video slots to choose from by superb casino software developers.

2) Choose a Secure Online Slots Casino

Our gambling experts emphasise this: ‘A safe online gambler is a happy online gambler’ and we couldn’t agree. Safety is essential to having a pleasant online casino experience. Our casino sites have all been checked thoroughly to safeguard your safety and security with state-of-the-art features ensuring you play your favourite real money slots games.

3) Pick the Largest Slots Bonus with the Best Terms and Conditions

Don’t settle for the first casino bonus you come across. Instead, choose the largest casino you can possibly find and keep in mind to go through the T&Cs prior to signing up and claiming the bonus. The wagering requirements can be demanding at your online slots casino of choice. Our Online Casino Bonus page can guide you better.

4) Choose a Real Money Slots Casino with Games on Mobile & Desktop

If you spend a good part of your day commuting to work by train or find that you are hardly at home, you are probably spending your time on your mobile phone rather than your laptop. You should prioritise a casino which offers online gambling on different platforms like mobile, tablet and desktop. You can even find download casinos which offer no internet slots.

How to Play Online Slots

You’ll quickly notice quite a difference between the slots at brick-and-mortar casinos and the video slots online. Online slots don’t have mechanical restrictions or a limited number of reels and paylines. Internet slots have great design and charming symbols with more advanced interactive elements such as bonus games and other in-game features.

Below we will take a closer look all elements you find in the various types of slots online.

slots online

  1. Jackpots – various slots come with the incentive of a progressive jackpot. Each wager that isn’t won, a percentage of your bet is added to the jackpot pool. Some progressive jackpot slots have a single prize. Others can have up to four. You have the chance to win either the Mini, Minor, Major or Mega Jackpot. To take part in the jackpot slot, you will need to play the maximum bet.
  2. Paylines – these are the betting lines or winning lines with the combination of symbols that result in a win. There are multi-payline slots which aren’t necessarily horizontal. Multiline slots can have varying paylines you can win.
  3. Credits/Player Money – This displays the available money which you can bet with. Every amount you win will be added to your total. Your player money will be in the currency you are playing with.
  4. Bet – This is the value of your bet by calculating your chosen coin value and lines multiplier.
  5. Multiplier – You can choose to insert several coins before you spin so that you can, in turn, multiply your potential profit. Let’s say you bet 3 coins and you get matching symbols worth 10 times. Your payout would be 10 x 3 so 30 times your stake.
  6. Autoplay – This is a setting to automatically spin the reel. You can choose the number of spins, or the amount of money to spend. Some autoplay buttons allow you to place a cap or limit before it stops spinning.
  7. Spin Button – Once you have decided the coin value and multiplier you can press the spin button to spin the reels.
  8. Max Bet Button – The maximum values of available settings such as coin value and multiplier. This is a button preferred by high rollers and players trying to hit the jackpot.
  9. Coin Value – You can adjust the coin value for each bet. You can place small bets or large bets. For example, bets worth can be 0.01, 0.10, 0.50, 1.00, 2.00, 2.25, 3.75, 10.00 and so on. You can alter both the coin value and multiplier before you spin.

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Guide to Choosing the Best Slots Online Games:

  • Online Slot RTP
  • Slot Volatility (or Variance)
  • Slot Game Features
  • Online Slots Themes (or Genres)
  • Slots Software Provider

Online Slots RTP

RTP is the Return to Player calculated as a percentage. RTP is kind of the house advantage but in reverse. Slots games use RNG so when the reels stop spinning you can rest assured; they are completely random. These would be tested by audit companies. The value of the slot RTP gives you an indication. The percentage relates to what per cent of a dollar will be returned to you, the player. Essentially, if a slot has an RTP of 95%, then you will lose 5% of every dollar you spend which is the house edge. It’s vital to remember that RTP is not calculated per wager, but rather over an extended period of time. Online Slot RTP is usually between 90% to 99%.

  • High RTP = 98% or more
  • Medium RTP = 95% - 97.99%
  • Low RTP = below 94.99%

 Highest RTP Slots

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Blood Suckers



0.25 - 50.00




1.00 - 20.00

Kings of Chicago



0.05 - 50.00

White Rabbit


Big Time Gaming

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Wolfpack Pays



0.01 - 2.00

Jack Hammer 2



0.01 - 2.00


Slots Volatility

Slots volatility or variance refers to particular elements of online slots. These are the payout frequency, how much you can expect to win and the slot machine’s level of risk required by the player. Low or high volatility isn’t a matter of good or bad, but rather your preferred style of playing slots. Levels of volatility are divided into 5: High, Medium-High, Medium, Medium-Low or Low.

High volatility slots are better for high rollers as you end up using up quite a large amount of your bankroll, however, when you win, you get very big wins in these kinds of slots. Low volatility slots are great if you have a small budget. These types of slots are exciting because you get small but frequent wins. Medium variance slots have the best of both worlds: they have smaller payouts than high volatility slots but larger than low variance ones. The same goes for the frequency of payouts as the amount you win is smaller than high variance slots and larger than low variance slots.

Slots Software Provider

There are hundreds of internet slots games available at different online casinos and most casino software developers produce unique slots games. Some software providers specialize solely in slots games. Some casino software companies have even developed land-based slots as well online ones. Such software includes Aristocrat, Playtech, Barcrest and Novomatic among others.

Other software providers are only available online. These include the widely popular software giants like NetEnt, Rival, Play’n Go, Yggdrasil, Microgaming, Betsoft, Ash Gaming, NextGen Gaming and many more. Online slots are great as you don’t need to download any software and usually these slots games have a seamlessly high quality on any interface whether you are playing on your laptop, tablet or mobile phone.

Slots Features

Online slots today are very different from classic slots. Casino developers have pushed the boundaries creating games when are becoming more engaging. You can find slot machines with 5 or more reels and with hundreds of paylines.

Even ways to win is a feature being adopted by slots games. You can find slots which are win-both-way, have hundreds of ways to win (such as 243 or 1024) and now with Megaways feature. Other slots have complex slot features like gamble features, scatter slots, bonus games, free spins and much more. On top of that, new video slots games have high-quality graphics and sound too!

Slots Themes

Just like with movies, TV shows and music, you have your favorite genre. The same goes for online slots games. Not only do they come in all shapes and sizes, but you can find several popular slot themes. Some slots themes are characteristic to a culture such as Egyptian slots, Asian slots or Irish slots. You can find slots themed to genres like fantasy-themed, sci-fi themed, detective themes or myth themed slots featuring Norse, Roman or Greek figures.

Movie buffs can find plenty of movie and tv themed slots, some of which are actually branded such as the infamous DC comics slots. You can find music-themed, video game themed, fruit-themed and many many other slots. One thing is certain – there is a slot out there for everyone.

Types of Online Slots

Slots are simple to learn how to play. You can find plenty of variations, so it does certainly pay to take time to understand how they work rather than diving right in. These different types of slots use have characteristic features. Here is a brief overview of each:

Classic Fruit Slots

fruit slots

Classic slots games are found online and are digital replicas of fruit slots and old-school games you are likely to find at land-based casinos. Vegas classic slots include the timeless fruit symbols like lemon, cherries, grapes and other symbols include horseshoes, bars, bells and cards suits like diamonds, spades and hearts. Classic slots are authentic and remain popular to this day. If you enjoy timeless classic slots and fruit slots rather than flashy symbols and music, then classic slots are the best fit for you.

Video Slots

These must be the most popular kind of online slots you can find on the internet. They mesh classic gameplay with captivating modern design. You can find video slots in a wide range of themes and with great in-game features. Video slots are unlike the traditional mechanical slot machines as these are designed and integrated by the software developers. Various pattern lines and features are incorporated in these slots. This could mean that winning lines can be from side-to-side, corner-to-corner, zigzags and so on.

3D Slots

Do you enjoy a great story? Then you’ll quickly get hooked to 3D slots which are part video game, part slots. While you spin the slots game reels, you can also progress through in-game different levels and mini-challenges and lots more. 3D slots have particular storylines, settings and functions. Each game is completely unique and you are completely immersed in the world created.

Progressive Jackpot Slots

Progressive jackpots slots are not a new concept as you can find that jackpots form part of popular slots at live casinos as well as online. How does a progressive jackpot slot work? Essentially, you have a jackpot linked to a slot machine which takes a portion of the amount bet by players and it’s added to a progressive pool with a large, but nonetheless hard-to-hit jackpot.

Everyone who plays these slot machines can participate in the progressive pool contributing to the jackpot and when it’s hit, you can win $1 million or more! Interestingly, jackpot slot machines can happen in the same location and other casinos can offer a multi-state jackpot which means payouts can he huge. You must play the maximum number of coins per spin to be eligible for the progressive jackpot. This thrill of playing slots online is synonymous with playing the multi-reeled game at brick-and-mortar casinos in the gambling meccas of the world.

3 Reel Slots

Slot machines are often categories by the number of reels. Reels are the vertical sections that roll each time you spin or pull the lever. The number of combinations increases depending on the number of reels. Playing 3-reel slots have a total of 20 symbols per reel. So the number of possible combinations is 8,000 (203). The probability of winning is 1: 8,000 x 100% which is 0.125%. These are still beloved types of slot machines.

5 Reel Slots

Online slots with 5 reels are by far the most popular and common type found globally. They come in all sorts of enticing themes with attractive features such as scatter slots, bonus rounds and more. The majority of 5-reel slots have the standard 20 paylines. You are more likely to frequently make small wins and sometimes make big wins. So, if there are 20 symbols in each reel, then there are 3,200,000 possible combinations (205). The probability of winning is 1:3.2 Million x 100% which is 0.00003125%.

Slots Apps – Real Money Slots & Free Slots Apps

In today’s world, with the rapid increase in the use of mobile devices, there has been an increased demand in mobile slots sites and slots apps. You can find several online casino real money slots apps as well as free slots apps. Social casinos offer a wide range of fun slot games too. People can enjoy classic slots, video slots and scatter slots apps other fantastic choices.

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Slots Strategy and Slots Money Management for Real Money Slots Online

Slots Strategy

Once you have mastered the simple rules of online slots, it’s time to think about something a little more complex – online slots strategy. You can implement a strategy when playing online slots for real money to bag more cash than playing without. Our strategy guide can help improve your chances of winning at internet slots. Luckily, not only are you spoilt for choice with the variety of slot machines online, but you can play free slots before you decide to put any money down.

Slots Money Management

Managing your bankroll is an important feature of effectively gambling. Your gameplay will be enjoyable, and you will be in for a smoother ride if it comes with a plan and a purpose that you unflinchingly stick to. Below, we have outlined the top slots money management tips:

  1. Know your Bankroll Needs for the Right Slots Money Management

    First, you should decide how much money you need in your bankroll for an enjoyable slot experience and when you discover precisely this, come hell, high water or the second coming, YOU DON’T BUDGE.

  2. Calculate Your Bankroll in Slots

    Now that you’ve decided your amount, you need to choose the machine you want to play and figure out how much you are willing to wager in an hour. Here it’s important to look for the volatility of your chosen slot machine. We recommend choosing a low to medium variance game where you can make smaller bets and play longer.

  3. Set Aside Your Winnings

    If you manage to make a tidy sum playing slots, do yourself a favor and don’t put all of it straight back in the game again. Aim to keep a percentage of your winnings separate from your bankroll and don’t touch it.

  4. Slow Down Your Play Speed

    The faster you play and the larger you bet, the quicker you will lose your money in the long run. If you play at a slower rate at any casino, chances are you will make better decisions for your next move.

Online Slots Bonuses and Free Spins

When it comes to slots online, there are so many features, at times it can get confusing. Here we are going to clarify everything you need to know.

Slots Casino Bonus vs Slots Bonus Game

Slots Casino Bonus

This is a promotion or a sign-up bonus at a casino that you can claim and use on their available slots games. Sometimes you can use the bonus on featured games at the casino’s discretion.

Slots Bonus Game

This is an in-game feature. The slot you are playing will give you access when you hit a required combination. These can be as scatter symbols or bonus symbols. These symbols can change to give you a big win or raise the value of hit paylines.

Free Spins Bonus vs Free Spins Slots

Free Spins Bonus

Some online casinos offer players a number of free spins in addition to your welcome bonus package. Some casinos offer as little as 20 free spins while other casinos are more generous and offer 50 or 100 free spins. These come with requirements such as an expiry date for the free spins and which games these free spins applicable for. These work like a no deposit bonus as you don’t need to wager your money and you can add your winnings to your bankroll.

Free Spins Slots Feature

This is an in-game feature where you are awarded several free spins when you spin and trigger a particular combination. These free slots spins don’t require any bets and you can keep your winnings too!

online slot machine

Slots History

The first slot machine was invented in 1895 by a car mechanic Charles Fey in San Francisco. This slot machine was called Liberty Bell and it had 3 spinning reels. Each reel had diamonds, spade and heart symbols painted in it and a cracked Liberty Bell. The highest payoff when you spin was a total of 50 cents or 10 nickels when you got a row of three Liberty Bells.

Slot machines have come a long way since then. Most casinos have reels operated with buttons (unless you’ve found yourself playing slots in a land-based casino frequented by dinosaurs). Online slots only require a gentle click or a tap. The original slot machines required a more athletic arm to guide the playing process as players had to pull down a side lever.

This part of the machine earned the much-loved contraption, the tongue-in-cheek moniker of the “one-armed bandit” - it was called this due to the fact that it had a reputation of “robbing players” of all their money deftly.

How do Slot Machines Work?

The principle behind the slot machine is a simple one. Slot machines are embedded with currency detectors that validate the inserted money. This is much like you would find in a vending machine. The amount you get in winnings depends on the symbols’ patterns once it stops spinning. Traditionally, the more uniform horizontal or vertical patterns you got, the bigger the payout.

Modern video slots online at online casinos have made it easier to win by implementing a bevvy of variants on the traditional patterns. It comes as no surprise that slots online are the most loved casino games and constitute most of an online casino’s income. Big money slots have become big business for those who want a piece of the million-dollar slots pie!

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The thrill of playing slots online is practically synonymous with playing the multi-reeled game at brick and mortar casinos at any of the world’s gambling meccas. Before you get started playing real money slots, we suggest you try out our free slots game first. Have a go when you head to our Free Slots page.

Slots Online FAQs

What online slots pay real money?

When on the lookout for online slots which pay real money, it's important to keep an eye out for online casino reviews as that's the place where you can find all the bonus information of each individual casino.

Where can I play online slots?

Here at CasinoTop10 of course. All you need to do is select your casino, sign up and start playing real money casino slots. If you're not sure where to start, just visit our free slots page.

How can I win at online slots?

As illustrated on our Slots Strategy page, there is no clear strategy to win at slots. Slots really is a game of luck.

Are online slots rigged?

No casinos which you will find on our site would dream of rigging their games and in fact, they all use a random number generators to guarantee fairness.

Is it legal to play slots online?

Whether or not you can play slots online for money depends entirely on your location. Always make sure to read the terms and conditions.

Can I play slots for free?

Here at CasinoTop10, we actually encourage you to play for free and learn the ropes before spending your hard-earned money.

Are online slots really random?

If you are playing at a reputable casino than the answer to this question is yes. As previously mentioned, good casinos use random number generators to determine the outcome.

Play Real Money Slots Online

With hundred and hundred of slots games to choose from and generous online casino bonuses to profit from, you are sure to enjoy playing online slots. Don’t miss out on the opportunity to sign up at one of the Best Slots Casinos and play real money slots today. Get ready to start spinning those reels and getting big wins, mega wins and astronomical wins!

18+ | Play Responsibly | T&C Apply
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