Did you know that more than 70% of the income of online casinos come from online slots? Slot machine games are the most popular game type in all casinos and there is a simple reason for this: They do not require any expertise but still offer satisfying prizes.

If you want to become a professional poker player, for example, you must play that game for years. Becoming an online slot player, on the other hand, can be done in 5 seconds: Just pick a slot game and start playing. Casino slots are for everyone and offer the most fun.

However, in order to increase your winning chances, you must still know a couple of things about slot games. This will be our purpose in this online slots guide: Below, you can find everything you need to know about casino slots.

What Is The Difference Between Slots Online And Casino Slots?

At first glance, it seems to be there is no difference between online slots and slot games at brick-and-mortar casinos. Both have the same rules and the same visuals. In fact, most of these slot machines are the same: Cleopatra slot, for example, can be played both in online casinos and brick-and-mortar casino buildings. However, there is still a big difference between these slot games: Return To Player ratio.

We will explain what RTP is below, but for now, know that it directly affects how much you will lose in the long run. In other words, if the RTP rate of an online casino slot machine is high, you will lose less often & get paid much more frequently. Now, according to laws, the RTP rate of brick-and-mortar casino slots cannot be less than 75%. This is actually a quite low rate, because the average RTP rate of online slots is 94%.

So, you will lose less while playing online casino slot games. And that’s why you should prefer online casino sites to play casino slots and all other types of casino games: The house edge will be lower. Don’t worry, we will explain what house edge is too – keep reading.

How Do Online Casino Slot Games Work?

Online casino slot games are actually computer software, which means all the things you see on the screen are “digital codes”. Slot games include an RNG (random number generator) software, which generates random numbers with every spin. And every symbol in the slot game has a numerical counterpart. When you press the “spin” button, RNG creates a random number and if it matches one of these numerical counterparts, that symbol(s) appear on the reels. Here is an example:

  • The numerical counterpart of “cherry” symbol is in between 70 and 80.
  • The RNG software creates a random number and it is 72.
  • Since both results match, the cherry symbol is displayed on the screen.

This is a simple example of course, but it explains the main principle of slot machines. It also explains why “experience” does not matter in online slots: There is no way to predict the result of the RNG outcome, so you cannot use a “tactic” to increase your winning chance. Online casino slots depend on being lucky and that’s the only thing you need. That’s why there is no difference between a veteran and a beginner: Both have the same chance of winning.

A professional card player, for example, can count the cards or read your body language to increase his chances. But you cannot do any of these when playing online casino slots – even the most professional player in the world cannot gain an advantage and affect the outcome in his favor.

The Difference Of Our Slot Games Guide

We are sure that you have read dozens of online slots reviews and online slot guides so far: Free slots with bonus is a popular topic and there are lots of content on the internet. However, most of them are “click-baits”: They don’t actually tell you anything important and useful. We, on the other hand, are dedicated to make you a better casino slots player: We will explain every important thing to know about slot machine games and offer you the chance to try lots of them for free.

Once you are done reading this guide, you will know what RTP is, how it affects you, and what to look for to find the best online casino slots. In short, we will turn you into a slot machine games expert. Let’s continue – we have lots of things to tell you.

Terms Of Online Slots: You Need To Know These

No matter which category they fall in, slot machine games contain lots of terms. It is of crucial importance to learn the meaning of these terms – by doing that, you can understand the category of an online slot, its payout frequency, and your potential win/loss ratio. We will also be using these terms in this guide too. So let’s list them all and explain one by one.

  • Symbols

All slot machines have symbols, no matter which category they belong to. The number of these symbols varies from game to game, but it is usually between 8 and 20. These are theme-specific symbols, and, for example, if you are playing a fruit slot game, the symbols will consist of fruit pictures. Your goal in slots online is to land the same symbols next to each other on a pay line. Usually, at least three symbols are required to qualify for a payout, but this number can be as low as 2. The prize will be determined according to the symbol set you placed, because each symbol has a different payout.

  • Wild & Scatter

These are special symbols with additional features. Wild symbol has the ability to substitute for all other symbols. So, for example, you can complete any winning combination with a wild symbol or expand a current one. Wild usually has the highest payout but again, every slot machine is different in this regard. Scatter is the symbol used for triggering bonus rounds. It has one more feature: It is the only symbol that does not need to be placed on a pay line to make a payout. In other words, scatter symbols can land anywhere on the reels and still give a prize, in addition to triggering the casino bonus games.

  • Payout

The cash prize of the slot game symbols. As explained above, each symbol has a different prize, based on their rarity. When we say “payout of symbols”, we mean how many coins they are paying for landing 3, 4, and 5 of them, respectively.

  • Paytable

Literally, the table that shows the rules of the slot game, payouts of symbols, and conditions for activating bonus rounds. You can view this table by pressing the same named button on the interface and/or a button that says “pays”, “view pays”, or “info”. Paytable usually includes the RTP rate of a slot machine too, so we highly recommend checking it before starting to play.

  • Pay Lines

These are real lines that connect both sides of the reels. Usually, you cannot see them but they are there – don’t think them as straight lines, they cross over every slot on the reels and look like weird, zig-zag drawings. Symbols will be placed on these lines, side by side and from left to right. The number of pay lines changes according to the slot machine category. For example, fruit slots usually have up to 5 lines. Video slots contain 15-20 lines but this number can go as high as 1.024, sometimes higher. As a general rule, the higher the pay line count, the higher your winning chances are. However, the minimum bet amount will be defined according to the number of pay lines too – read the “bet amount” section below to learn more.

  • Bet Amount

This means how much you are betting for each pay line. These are different things, and it is important for you to understand this distinction. The minimum bet amount in an online slot is actually the minimum bet for a single line. You are betting per line, not per spin. Let’s say an online slot has 20 pay lines and the minimum bet amount is listed as 0.01 coin. The cost of per spin will actually be 0.20 coin if you bet on all lines (0.01 x 20). So, while bigger pay line numbers increase your chances of winning, they also increase the bet amount.

  • Progressive Jackpot

This is a specific category of slot games, which the prize keeps increasing with every game played. That’s what “progressive” means. While the prize can reach quite high amounts (sometimes millions of dollars) the RTP rate of these slots are lower than usual, so their payout frequency will be much less. Usually, we don’t recommend playing progressive jackpot slots – your chances of winning are lower than any other online slot category.

  • Bonus Round(s)

Slot games with bonus rounds are pretty common. In fact, almost all online slots have some kind of a bonus round. By landing a specific set of symbols (for example, three scatters) you can activate the round. This is usually a free spin round, where you get to spin the reels for free for a certain number, for example, 20 times. The prize at the end of the round is yours to keep. However, there are other types of bonus rounds too: You can play a mini-game, or try to guess the sign/color of a closed play card. Innovative online slot developers offer innovative bonus rounds – there is no limitation in this regard. We even saw mini-games where you get to shoot at the screen.

  • RTP (Return To Player)

And here is the most important thing you should know: RTP rates define how much of your investment you can recover. Or, it shows how much you will lose in the long run. Here is an example: Let’s say the RTP rate of a slot game is 96%. This means you will get to recover 96 EUR of every 100 EUR you invested. In other words, your losses will be 4 EUR, maximum. RTP is the opposite of house edge, which shows how much the casino operator will win from your bets, in the long run. In this example, the house edge is 4%, which means the online casino will be winning 4 EUR from every 100 EUR bet you make. As a player, your goal should be finding the highest RTP rates in online casino slot machines. 94% should be the minimum RTP rate – do not play slot games that have a less rate than this.

  • No Download

A simple term to explain that you do not need to make a download & install a program to play a slot machine. New slot games are developed with HTML5 nowadays, so none of them require a download. You can play all kinds of casino slots with your browser, desktop or mobile.

Types Of Slot Machines

Well, slot machine terms are not the only thing you should learn: Slot games are a big category and include lots of different kinds of online slots. While the general rule is the same, the gameplay and even the winning chances are different in each type. In this regard, here are the most common types of online slot games and their explanations:

  • Classic/Fruit Slots

These are the “authentic” slot games that contain only a few lines and symbols. They are also called fruit machines because their symbols are fruit pictures. On average, they don’t have more than 5 pay lines and 8-10 symbols. They usually don’t have bonus rounds and special symbols too. However, they are the cheapest slot game to play, especially if you are on a budget: Even with 10 EUR; you can spin the reels for hours.

  • Video Slots

The majority of casino slots fall into this category. Video slot machines have more symbols and pay lines and therefore, offer better winning chances. Bonus rounds are the main feature of video slot games and almost all of them have impressive visuals. If you are truly a beginner, start with playing video slots: Dozens of themes are waiting for you. We recommend picking 20-line video slots in general. While there are even 1.024-line video slot games, the cost per spin is too high in those.

  • 3D Slots

Same as video slots, but these have quite impressive visuals. In fact, they look like CGI movies – the graphics are that good. 3D slots require powerful hardware, so the best platform to play them is desktop PCs. They are not actually three-dimensional games; this term refers to their advanced graphics quality.

  • Multi-Line Slots

This is a term used for video slots that have “virtually unlimited” pay lines. With every winning spin, the number of pay lines keeps increasing and it can easily go over 1.024. Their cost per spin is pretty high and for this reason, they usually have a fixed jackpot prize. Multi-line slots can be seen in brick-and-mortar casinos mostly, online casinos have better systems that offer fixed pay lines.

  • Jackpot Slots

Jackpot slots online are one of the most popular slot game types. Unlike progressive jackpot slots, their prize pool is fixed, so it does not increase or decrease with every game played. This is not a bad thing because they still offer satisfying prize amounts and high RTP rates. Instead of progressive jackpot slots, we recommend playing fixed jackpot slot games – your winning chances will be much better.

  • VR Slots

Virtual reality slots are a new thing and require a special google to play. However, these are not expensive googles of Oculus or HTC Vive. Even a 90 EUR google can do the job fine and you won’t be needing a PC too, VR slots can run on mobile devices. It is an immersive experience and we highly recommend trying it, if you have the budget. VR slot games are rare but more and more providers start to develop them every day. In fact, they may be the future of all online casino slot games.

  • Multiplier Slots

These are either classic or video slots, but their symbols pay with multipliers only. Instead of paying 10 coins, for example, they pay 10x total bet. In general, they are quite advantageous games, as your potential winnings are high. However, in order to get the maximum payout, you must play with the maximum bet.

Free Casino Slots Vs Real Money Slots: Which One To Prefer

This is a meaningless debate, because you should prefer both. You don’t need to pick one – there is no need for that. Allow us to explain:

  • Free slot games should be used for practice and learning the rules & the conditions that trigger the bonus rounds. Even if you have the money, you should always try a new slot game in demo mode first. Free slot games show you whether that game is suitable for your needs and/or how often it makes a payout. In other words, don’t start playing new slot games with real money immediately: Try them without taking any financial risks first.
  • There is no difference in regards to rules and winning chance between free slot games and real money slots. The only difference is that you will be playing with a virtual budget. Do not confuse this with demo versions of PC games: Free slot games contain all the features as their real money counterparts. Nothing is limited behind a paywall.

So, play both of them: Free slot machines are perfect for making practice and casual gambling. And real money slots are the only way of winning real cash prizes. Instead of picking one, combine both and get the best possible casino slots experience.

How To Find Popular Slot Games And Where To Play Them

In order to find the best online slots, you should find the best slot providers. Slot machine games are developed by these providers, and some of them are better than the rest, as can be guessed. In general; Microgaming, Novomatic, Netent, Play’n GO, and IGT offers the best online slot games, but there are lots of independent studios such as Endorphina, Thunderkick, and Rabcat too. Take a look at our online casino software guide to learn more about these providers: Finding the best ones will result in finding the best online slots.

After that, you should find an online casino that works with these providers. Instead of searching on the internet, you can pick one of our recommended casino sites and start playing without wasting any time. Finding the best online casinos requires a different kind of expertise and you should leave this job to us, the professionals.

How Can I Find The Best Casino Online To Play Online Slot Machines Real Money?

Well, after reading this online slots guide, you can start by taking a look at all of our other articles on this website. Finding the best online casino is not an easy task and there are lots of things to consider. The casino site must be legal, fair, safe, and contain hundreds of slot machines to choose from.

As can be guessed, only a couple of online casinos can offer all of these and if you are a beginner, you won’t be able to find them by yourself. Instead of relying on search engine results, read our other guides and pick one of our recommended online casinos. Our professional team tested each and every one of them in detail – we know what we are doing and we recommend you only the best.

I Heard About An Online Slots System, And…

Let us stop you right there. We are sure that you heard lots of “systems” that “guarantee” a winning in online slot games. Thing is, none of these are true. Most of these myths originate from the old days, when slot machines used real cogs and wheels. Up until the 60s, slot games were not electronic – when you pulled the lever, you were actually powering up the mechanism. And since there were only a couple of combinations that can be formed, it was really possible to predict when the machine will pay out.

However, this is not the case anymore in 2019: There is no way to predict the results of the RNG software, as explained above, and therefore you cannot use a tactic/strategy/system to increase your chances. If you don’t believe us, play free slot games and see for yourself: None of these “systems” will work. You just need to be lucky and pick the slot games with the highest RTP rates.

Online Casino Slot Games FAQ

If this means the bonuses you get at online casinos, there are plenty of online slots related promotions. Casino slots are the most popular game category at casino sites and most of the bonuses focus on them for this reason. You can get welcome bonuses, no deposit free spins bonuses, reload bonuses, and even cashback bonuses for online slot machines. In addition, you will be getting lots of online slots tournaments too. If you are referring slot games with bonuses, there are still plenty of options: Bonus games slot machines offer lots of variety such as free spins, mini-games, and gambling rounds. Take a look at the “terms of online slots” section above to get more information about this topic.
Yes, but this distinction is not important anymore in 2019. Once upon a time, casino games online were downloadable exe files, which you need to install like any other computer program. Nowadays, this is not the case: Thanks to advanced coding algorithms, all casino games can work on multiple platforms at the same time. In other words, there is one “single” file for all operating systems (desktop or mobile) and you don’t need to install it at all. Whether you are using a desktop PC or a mobile device, you can play that game without downloading anything. In short, every slot game is for PC and for all other operating systems.
This means you don’t need to download and install a program to be able to play in an online casino. Such casino sites support “instant play” technology, which means you can play free casino slot games with bonus rounds with your browser only. Moreover, you can make payments, reach customer support, and activate bonuses too – none of these will require downloading a program. In 2019, the majority of online casino sites fall into the “no download” category and this is a good thing. Because, online casinos no downloads can work on mobile devices too, whereas online casinos that require a download can only work on desktop PCs.
Online slots real money no deposit bonus is a common promotion organized by casino operators. This means after becoming a member, the online casino gives you a couple of free spins that can be used on a real money slot. And if you win a cash prize with these spins, you get to keep it. In other words, you get to play real money slots without making a deposit. However, you must still complete a wagering requirement in order to withdraw your prize. Please take a look at our other guides to learn what this is – we prepared lots of articles and guides that explain wagering requirement in detail.
You are. The interesting thing about progressive slot machines is that the prize actually comes from the players, not the online casino. Each bet increases the prize pool further, and the grand prize is actually the total of all the “lost” bets of other players. With every spin you make, you are actually feeding the pool. So, if a progressive slot machine is offering millions of dollars, for example, this means thousands of players have tried their chances and lose. The initial reward at the prize pool is offered by the casino operator of course, but it is the players who make it bigger. And the payout is made by the casino operator but it is, again, the players who “send” the money to the casino. Note that these explanations do not apply to free progressive slot games, as their prize pool is virtual.
Absolutely. There are lots of slots apps available on the official application stores and most of these are free slots app, which means you don’t need to pay anything to play them. However, slot apps are not your only way of playing these games on mobile. When you visit an online casino from your mobile device, you will access to the mobile version of that website, which means all of the games (and other features) will still work. You can play online slots for real money or try their demo versions – both options are possible. In fact, gambling with a mobile device is a different kind of experience and we highly encourage you to try it. The chance to play online slots anytime and anywhere is a big plus, and your mobile device makes this happen.

Play Online Slots Real Money Or Free: The Choice Is Yours!

Now, you know how slot machines work, how to find new casino slots games, and how to get rewarded more frequently – you are ready to become the ultimate online slot player. Pick a free game casino from our website and practice first.

Take advantage of the welcome bonuses too: This way, you can create a starting capital for free. And when you list slot machines that suit your needs the most, you can start playing them with real money. Good luck and may the reels turn in your favor!