Online Slots 2021

Who does not know the slot machines that are found in almost every pub and many restaurants? And who hasn't put a dollar or two in the slot? But in the meantime, many entertaining games migrated to the Internet, and online casinos are among them. A large and important part of the offers is online slots. The big advantage of an online slot is that the winning opportunities are much higher, as larger amounts can be distributed. And nobody has to leave the house to play. An Internet connection and a computer, smartphone, or tablet are enough to pass the time with the sometimes very complex games.
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Noah Martin
Author:
Noah Martin
Last update:
April 22, 2021
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This author was thoroughly tested and approved by the experts at CrushingCasinos.com before joining the editorial board to ensure a high content quality.
Author Bio:
 
Noah has been in the online casino business for a long time, initially working at Caesars - a US gambling company, before switching to journalism and working as an editor. Later he started his own business and applied his knowledge in creating different website and now he is the owner and editor-in-chief of CrushingCasinos.com in Canada.
Noah has been in the online casino business for a long time, initially working at Caesars - a US gambling company, before switching to journalism and working as an editor. Later he started his own business and applied his knowledge in creating different website and now he is the owner and editor-in-chief of CrushingCasinos.com in Canada.

Online Slot Casinos: Favorites of Casino Crusher

Registering at the right online casino is essential, and various aspects need to be considered. It's not just about quantitative elements, but also qualitative ones. And of course, the online casino has to suit you, no matter if there are so many games.

However, the following points are essential:

  • Number of Slots: Not all online casinos offer the same slot games. Some are limited to a smaller selection, while others have 2,000 or significantly more slots at the start. The number of slots is crucial if you want a wide range of themes and slot types.
  • Selection of Software Provider: Most game developers have their way of programming casino slot games. Some stick with simple concepts, while others produce real graphic monsters with many bonus features. The greater the selection of game developers, the better for you.
  • Jackpot Slots: Jackpot Slots are very popular because, with them, you have the chance of a single win that is much higher than with normal slots. Therefore, a good selection of such slot machines is very important.
  • Demo Mode: If you find a slot interesting but don't know it yet, you can play the slot machine for free in demo mode in a good casino. For this, you get play money and can try out all the rules and mechanics in peace.

Top 3 Online Slot Casinos in Detail

You cannot imagine a reputable online casino not offering slot games. However, some of them stand out from the crowd thanks to their game library and promotion offers. We find these three casinos the best choice for playing online slots.

  • Woo Casino: Woo Casino is unbeatable for its offer of online slots. Players can enjoy over 3,500 titles developed by some of the most reputable software providers in the market. Additionally, you can get up to $300 and 200 free spins as a welcome offer when making the first deposit.
  • Maneki Casino: Customers won’t be disappointed with what Maneki Casino has to offer. More than 3,100 slots can satisfy any kind of casino player. Reputable game developers guarantee a top-notch gaming experience. Don’t forget the welcome package as well! After making the first deposit, you can get up to $500 and 99 free spins!
  • FastPay Casino: Vast number of online slots titles is a major trademark of FastPay Casino. Slots fans will be thrilled to find over 3,100 games provided by the most famous development studios. Of course, there is a juicy bonus for all new players. Make the first deposit and get up to $225, followed by 100 free spins!

Our Slot Reviews - Play Free Demo





Are there Special Casino Bonuses for Slots?

From the casino's point of view, a casino bonus draws new customers' attention to the casino. The prize is intended to get the player to register and make a deposit in the best case. In return, there is either a bonus in the form of bonus credits, free spins for certain slots, or a combination of both.

Such bonus offers are particularly suitable for slot game fans. Of course, you don't get the bonus money without conditions. As a rule, you will have to wager the casino bonus before transferring the amount for withdrawal. One-time wagering is not sufficient, as most of the time, you have to wager the bonus 20, 30, or 40 times. But the stakes are not rated equally for all games.

In many online casinos, it is clear in the wagering requirements that the bonus for slots is calculated at 100%. With casino games such as roulette, blackjack, or baccarat, things are quite different. Under certain circumstances, only 10% or less will be credited to your bets. Sometimes these games cannot be used with bonus money at all.

It clarifies that the implementation of bonus conditions is usually only possible quickly and efficiently with online slots. There are also bonus offers in which you can get free spins on certain slots, sometimes even without making a deposit. You can sometimes keep the winnings, and sometimes they are counted towards your bonus balance and are then subject to the wagering requirements again.

Score
4,5
Bonuscode
100% up to
$300
+ 200 Freespins
Slots
3500+
Developer
AmaticEgtElk StudiosEvolution Gaming
19+ / T&C applies
Score
4,1
Bonuscode
100% up to
$500
+ 99 Freespins
Slots
3100+
Developer
AmaticBally WulffEgtElk Studios
19+ / T&C applies
Score
4,2
Bonuscode
100% up to
$225
+ 100 Freespins
Slots
3100+
Developer
AmaticEgtElk StudiosIsoftbet
19+ / T&C applies
Score
5
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100% up to
$600
+ 200 Freespins
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3100+
Developer
AmaticBally WulffEgtElk Studios
19+ / T&C applies
Score
4,1
Bonuscode
100% up to
$500
+ 100 Freespins
Slots
3000+
Developer
AmaticEgtElk StudiosEvolution Gaming
19+ / T&C applies

What are Progressive Jackpots?

A slot with a jackpot is particularly appealing to many adventurers. But why? A progressive jackpot continues to grow, sometimes in the millions for particularly popular slots. It is because a certain proportion of the money used by all online casinos in the world flows into the jackpots.

This is also why, in the event that someone hits the jackpot, it is not the casino but the game provider responsible for paying out the winnings. So you don't have to worry about the fact that the casino in which you play cannot or will not pay you the winnings. Everyone who plays at a jackpot slot machine has the opportunity to hit the jackpot. However, this is often not the case, which can be seen in the sometimes very high sums with which the jackpots are equipped.

The Biggest Jackpots of All Time

  1. €18,915,721 at Mega Moolah: On 2018-09-28, the biggest jackpot of all time was won. It's one million above the second one on this list.
  2. €17,861,813.00 at Mega Fortune: The second-biggest jackpot went to Finland on 2013-01-20. The NetEnt developed progressive jackpot landed a second place on this list.
  3. $20,057,734 at Mega Moolah: A player from Zodiac Casino picked up this one on 2019-01-30. The willer decided to remain anonymous.
  4. £13,212,882 at Mega Moolah: A soldier from the UK was lucky enough to land this huge jackpot on 2015-10-6. This one is won in Betway.
  5. €14,679,069 at Mega Moolah: This one was hit on 2020-08-17 at Lucky Casino. It is also the 67th jackpot won on this progressive jackpot.

Which Are the 3 Most Popular Jackpot Slots?

Jackpot slot games online are extremely popular with players in all kinds of casinos. The attraction lies in the high payouts that are available. Here is a brief introduction to the most popular three jackpot slots.

Microgaming's Mega Moolah has been in the market for many years. It is equipped with five reels, and there are 25 active paylines. The minimum bet is $0.25, and a maximum of $6.25 is possible. Four progressive jackpots are waiting to be cracked by you. Mega Moolah's payout percentage, excluding the progressive jackpot, is around 94%, which is on the lower end of the scale.

Mega Fortune is developed by one of the largest and most respected providers, NetEnt. The slot machine comes classic with five reels and three rows each. Thematically, the slot is set in the world of wealth and luxury. Therefore, the winning symbols are closely related to this topic: expensive cars, luxury watches, champagne, rings, cigars, etc. There are three jackpots to crack: Rapid, Major, and Minor, all filled according to progressive rules. The payout ratio at Mega Fortune is 96.60% and is therefore in the middle.

Gladiator Jackpot is the popular jackpot slot provided by PlayTech. This slot game is an implementation of the famous blockbuster from the dream company Hollywood. Accordingly, many likenesses and references for the film appear here. The five reels slot, each with three rows and 25 active paylines, can be fed with stakes between $0.01 and $25. Free spins can also be won.

Top 10 Online Slots that Payout the Most (RTP)

RTP is the abbreviation of the term "Return to Player" and means what percentage of the stake a player gets back on average when playing a slot. It is a theoretical value that is based on a large number of runs of a game. In order to be able to judge the fairness of a slot more precisely, the RTP rate is important information.

  1. Ugga Bugga - up to 99.07%: It is a slot from PlayTech with a very unusual structure. You play here on ten different pairs of three symbols. The rules are not immediately apparent, so a little training is required. However, due to the high payout ratio, this is a worthwhile undertaking.
  2. Mega Joker - up to 99%: This one is a classic fruit slot from NetEnt. You can win a maximum of $30,000 at this machine that consists of five reels with three rows each and comes with the well-known fruit symbols. Melons, pears, grapes, and the Mega Joker as wild and the famous lucky number seven shape the success slot's appearance.
  3. Nemo's Voyage - up to 99%: The online provider Williams Interactive, which is not that widespread, is responsible for this five-reel slot. The theme is the science fiction novel "20,000 Miles Under the Seas" by the French author, Jules Verne. Corresponding symbols such as the famous diving bell and all sorts of marine animals can be discovered here.
  4. Ooh Aah Dracula - up to 99%: As the title suggests, this Playcrest slot is about the most famous of all vampires. The story of the Count from Transylvania is taken up humorously. It is equipped with five reels and ten pay lines, and this horror slot provides plenty of action.
  5. Jackpot 6000 - up to 98.86%: It's a real classic from NetEnt. You play with fruit symbols and a typical wild symbol on three reels with three rows each. There are plenty of winning combinations, and the RTP rate suggests long gaming fun.
  6. 1429 Uncharted Seas - up to 98.60%: Thunderkick has put a lot of effort into the graphic implementation and transports the player to the seven seas with this five-reel slot. Here it is important to assert yourself against sea monsters and mythical creatures and find the right path using the sun, moon, and stars.
  7. Blood Suckers - up to 98%: Another classic from NetEnt that inspires with a high payout ratio. This five-reel slot offers 25 paylines. Thematically it is about vampires. The gruesome-creepy pleasure ensures good profits on the online casino.
  8. Jokerizer - up to 98%: The increasingly well-known developer studio Yggdrasil is responsible for this slot. The game impresses with a symbiosis of classic elements and a modern game structure. The fruit slot offers a lot of variety, stylish graphics, and, last but not least, a high payout ratio.
  9. Good Girl Bad Girl - up to 97.80%: A Betsoft slot with an interesting topic. It's about the famous "little angels and devils" that each of us has on our shoulders. Which of the two we listen to is up to us, and you have to make this decision at Good Girl Bad Girl.
  10. Retro Reels Extreme Heat - up to 97.5%: In our last entry on the list, it's one of the market leaders in online slots, Microgaming. Retro Reels Extreme Heat keeps what the title promises. It is a retro slot with classic winning symbols, five reels, three rows, and ten paylines. With the burning 7 you can get a lot of online slots real money.

What are the Biggest Slot Software Providers?

The beginnings of slots go back decades. But since the Internet conquered the world and computer technology has become indispensable, a lot has changed. Without resourceful and creative people, slots in their current form would be inconceivable. In the past few years, some development studios have been able to position themselves at the top of the market. An overview of the top five game providers:

  • NetEnt: Founded in 1996 in Stockholm, the Swedish group is one of the pioneers in business and is now one of the world's largest studios. There is hardly an online casino that can do without the provider's slot games and gaming machines. NetEnt specializes in video slots, and titles like Starburst or Dead or Alive have achieved cult status. But NetEnt has a lot more to offer.
  • PlayTech: This software provider was founded in 1999, and it is well-known for top-quality slots. Many small developers are collaborating with them, and that helps them grow their portfolio. Age of the Gods and Gladiator are probably the most popular slots developed by this company.
  • NextGen Gaming: NextGen Gaming puts a strong focus on developing online slots. There are over 350 titles in their portfolio, and more than 750 casinos worldwide include their slots in the offer. Merlin's Millions, Jackpot Jester 50.000, and Gorilla Go Wild are the most notable ones.
  • Microgaming: This provider is also one of the pioneers of the online casino era. The company even publishes that it was responsible for the first online casino of all time. But Microgaming quickly concentrated on developing software for the casino market: online games, the best slot games, slot machines of all kinds, and casino games.
  • Lightning Box: Lightning Box entered the market in 2004, and the company managed to establish itself as a top-notch slots developer. Slots developed by this company offer some exciting bonus features. You should try out some of the most popular titles, such as Fortune 8 Cat, Dolphin Gold, or Samurai Princess.

How do Online Slots Work?

While the basic functionality is the same for almost all online casino slots, the machines differ in their special features and functions. Although there are slots that can do without these additional functions, game mechanics of varying complexity play a role during the game.

  1. Wilds: Wild symbols are very popular in slots. They work like wild cards and can substitute for other symbols to increase the chance of additional combinations. Most of them appear as individual symbols, but they can also have certain properties. An expanding wild, for example, takes up the entire reel. There are often different wild symbols in a slot. For example, those that remain in place the next time you shoot.
  2. Scatter: Scatter symbols can have different properties. In numerous classics, scatters are symbols that count as winning combinations above a certain number even if they are not on a payline. In most modern slots, three or more scatter symbols trigger the free spins mode. It doesn't matter where they are on the reels.
  3. Free Spins: How free spins can be obtained can differ from slot to slot. Scatter symbols are most commonly used for this. Three or more scatters then trigger a set number of free spins. The player does not have to pay a stake for this. In most cases, free spins come with additional bonus features, such as expanding wilds or similar gimmicks.
  4. Multipliers: They are used in a variety of video slots. Most of the time, it's about profits that build on each other. A win ensures that the multiplier value increases. On the next spin, the win is multiplied by the multiplier. In this way, a whole chain reaction can be set in motion. But there are many more possible uses for multipliers.

In our opinion, the best slots are Ugga Bugga, Mega Joker, and Nemo’s Voyage because these slot machines have the highest payout percentages in comparison. It means that the risk of losing your capital is lowest here, which means that the playing time is the longest in comparison with other slots.

There are several ways to play a slot for free. On the one hand, there are the websites of the manufacturers themselves. Industry giants such as NetEnt or Microgaming provide demo versions of their slots. But the slots offered can also be tested in many online casinos, sometimes even without prior registration.

No, there is usually no separate software to download to play online slots. The games can be started conveniently and directly from the browser. However, there must be an internet connection, otherwise, the games will not work.

The market for smartphones and tablets is becoming more important these days, as the game providers recognized it long ago. Therefore, the slot machines are also offered for smartphones and tablets as well as other mobile devices. HTML5 makes most slot machines online compatible with Android and iOS.

Online slots use RNG, a random number generator, to determine the outcome of the game. Every time, the results are random, and the game does not apply any cyclical intervals.

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