Types of Slots at Online Casinos & Our Favourite Slots Sites in 2022

Slots can be categorised in many different ways because they are super versatile. They can be sorted by themes, graphics, paylines, mechanics used – you name it. But to make this guide easier to grasp, we've chosen to group them according to their number of reels, prize potential, and platform compatibility. Find out which types of slots are best-loved by the players and choose a slot site to explore your favourite type:
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Top 10 Online Casinos by Type of Slots

Although online casinos try to include as many slots as possible, some sites are slightly better than others when it comes to certain types of slots games. You will find online casinos with dedicated sections to progressive slots, others featuring many high payout slots and those with the trending live slots. That’s why we’ve listed 10 of the best slots sites online and highlighted the types of slots they are best for:

  • 🥇 Mansion (Most Types of Slots Available Online)
  • 🥈 Betfair (Best Online Casino for Mobile Slots)
  • 🥉 BetVictor (Top-Rated Vintage 3-Reel Type of Slots)
  • 🏅 888Casino (Great for Different Types of Video Slots)
  • 🏅 LeoVegas (Top 3D Real-Money Slots for Pro Players)
  • 🏅 Unibet (High-Rated Progressive Slots with Juge Jackpots)
  • 🏅 Casimba (Many Types of Slot Games in the App)
  • 🏅 Grand Ivy (Recommended for Free Spin Slots Bonus)
  • 🏅 Ladbrokes (Best for Live Slots Trending Now)
  • 🏅 Betway (Excellent Collection of High Payout Slots)

You will find various types of slots on the websites of all the casinos in the listing above. But we’ve tried to make your choice easier by finding the biggest advantage of each of the operators. And rest assured that all of our recommended sites are licensed and regulated by reputable authorities such as the UKGC, the MGA and the GBGA, so they are completely safe.

Best Types of Slots Machines Online in December, 2022

We’ll now go into further detail and focus on specific titles. We’ve chosen the most popular types of video slots and recommended both a game and a premium online casino where you can play it. We’ve also included information about the RTP percentage because this is one of the first metrics players are interested in. As you know, the higher it is, the better! Here are 10 of the most popular slot types and their best-loved representative:

Online Slot: Best Casino: Type of Slot: RTP: Software: Rating: Secure Link:
5-Reel 96.10% NetEnt
5.00 ★ out of 5
www.mansion.com
Mobile 96.10% Real Time Gaming
4.95 ★ out of 5
www.betfair.com
High Volatility 96.40% NetEnt
4.90 ★ out of 5
www.betvictor.com
Free 96.98% NetEnt
4.85 ★ out of 5
www.888casino.com
3D 95.97% NetEnt
4.80 ★ out of 5
www.leovegas.com
Progres sive 88.12% Micro gaming
4.75 ★ out of 5
www.unibet.com
Real-Money 96.86% Micro gaming
4.70 ★ out of 5
www.casimba.com
3-Reel 95.75% Micro gaming
4.65 ★ out of 5
www.grandivy.com
Live 95.96% Playtech
4.60 ★ out of 5
www.ladbrokes.com
High Payout 99.00% NetEnt
4.55 ★ out of 5
www.betway.com

The titles in this table are probably some of the best-known slots online, so they need no further presentation. But depending on your favourite type of slots, you may need to brush up on your skills if you’re not sure how to play slots online. Remember that certain types of slots do require you to be familiar with the paytable before playing.

The Best Types of Slot Games Reviewed

At first, when we set out to write this guide about types of slots games, we were taken aback by the immense opportunities of grouping the slots in whichever way we like. Shall we group them by the mechanics used in them? Or by theme? Or by novelty? Finally, we concluded that we’d research what types of slots the players are looking for.

And so, we came up with 10 categories. Every 2 types can be either juxtaposed with one another or complement each other. In the following paragraphs, we’ll review each type of slots discussed on this page and offer the top 3 slots in the respective category.

And if you are wondering how fruit machines got so complex that we are now unable to list all possible types of slots machines, you will be interested to learn a peculiar fact from the history of slots. Did you know that in 1996 the first online casino featured 18 slots from Microgaming?

Fast forward 25 years, and you now have slot sites with thousands of titles. The boom of online gambling and the unprecedented popularity of online slots have forced many software giants to switch their focus to developing online titles.

3 Reel Slots

If you pay close attention to movies where a slot scene is shot, it would most definitely be a 3 reel slot. They are the most popular types of slot machines at land-based casinos and have an unexpectedly large fanbase. 3 reel slots are not so easily found at most online casinos, but if you know where to look for (like we do), you’ll be surprised to find some good old classics still online. Here are the best 3 reel slots online available:

Best Online Casino: Sign Up Bonus: Top 3-Reel Slots: Casino Rating: Secure Link:
Up to £500 + 10% Cashback Fountain of Youth Bermuda Triangle
5.00 ★ out of 5
www.mansion.com Full T&Cs apply. New customers only. Min deposit £20 max bonus amount £500. First deposit: 100% up to £200. Second deposit: 50% up to £300. Wagering 40x for each bonus. Game weighting applies. Cashback: 5% cashback on first and all other deposits during week 1, 10% cashback on all additional deposits taking place in week 2 only. Bonus betting limits: slots - $/£/€5 all other games – 10% of bonus amount.
Wager £10 & Get £30 + 100 Free Spins 9 Lions, 7s on Fire
4.95 ★ out of 5
www.betvictor.com Full T&Cs apply. 18+ Opt in. Wager £10 on selected games within 7 days of registering. Get 3x £10 bonuses, selected games, up to 40x wagering to withdraw max £750. 100 free spins on selected games, no wagering. Bonuses expire in 7 days. Card payments only. Click for T&Cs
Up to £100 + 30 Free Spins Fire Joker, Diamond Duke
4.90 ★ out of 5
www.leovegas.com Full T&C’s apply. New reg only. Claim 10 free spins x10p each on Book of Dead (no deposit needed) within 3 days. Opt in & deposit £10, £25 or £50 within 7 days & further 7 days to wager cash stakes 35x to unlock reward (£50 on 2 deposits). 3 day exp. Wagering/game contributions vary. 10 wager-free spins x10p to added to Book of Dead with each qualifying deposit, 3 day expiry. 18+ BeGambleAware.org

Old-school 3-reel slots are great for beginners because they have fewer paylines and are easier to follow. You will actually know what symbols to look for and when you win, you will know why. They are also great for people who like to gamble at land-based casinos but have decided to vary their game online. Also, it’s not just the fun. This type of slots has high volatility and great RTPs, making them potentially very profitable.

5 Reel Slots

Now, if you’re up for something a little bit more graphically impressive, you’d love 5 reel slots. There are different types of video slots at online casinos, but 5 reel slots are the most popular casino game on the internet. They are much more diverse than retro 3 reel slots but can be overwhelming to new players. If you don’t know where to start, these are 3 of the best video slots online:

5 reel slots are great for a bit more experienced players. That is, of course, if you actually want to know what’s happening instead of spinning the reels aimlessly. Compared to 3-reelers, this type of slots offers many more symbols, paylines and winning combos. However, if you’ve never played 5 reel slots, be ready for a steep learning curve because many features can be added, such as wilds, scatters, bonus rounds, free spins, Megaways and whatnot.

Free Slots

Have you been gambling online long enough to remember when the UK allowed playing demo versions of most of their RNG games for free? Well, unfortunately, that’s not the case anymore.

Free slots to play for fun are still found at some online casinos, but only after registration and verification. Below, we’ve listed the top 3 sites to play slots for free:

Best Online Casino: Sign Up Bonus: Top Free Slots: Casino Rating: Secure Link:
100% up to £100 + £88 Free Guns N’ Roses Reactoonz
5.00 ★ out of 5
www.888.com No Deposit Offer 18+ • New players with valid mobile number only • Claim in 48 hrs • 14 day expiry • Valid for selected games • Pre-1st deposit only: FS voucher winnings is uncapped, bonus wins & max redeemable amount for non-funded players capped at £100, excl. JP wins • Wager Bonus x1 - req. contributions vary by game • Bonus expires in 90 days • Deposit Offer: 1st time depositor at 888casino only • £20 min deposit • Claim in 48 hrs • Valid for selected games • Bonus wins capped at £500, excl. JP wins • Pre-1st deposit only: Bonus wins & max redeemable amount capped at £100, excl. JP wins • 30x wagering – req. vary by game • Bonus expires in 90 days • Payment method & country restrictions apply • Withdrawal terms, No Deposit Offer terms & Deposit Bonus Offer terms apply. • Full Bonus Policy appliesBeGambleAware
Up to £100 + 30 Free Spins Jimi Hendrix Danger High Voltage
4.95 ★ out of 5
www.leovegas.com Full T&C’s apply. New reg only. Claim 10 free spins x10p each on Book of Dead (no deposit needed) within 3 days. Opt in & deposit £10, £25 or £50 within 7 days & further 7 days to wager cash stakes 35x to unlock reward (£50 on 2 deposits). 3 day exp. Wagering/game contributions vary. 10 wager-free spins x10p to added to Book of Dead with each qualifying deposit, 3 day expiry. 18+ BeGambleAware.org
Deposit £10 & Get £40 Welcome Offer Extra Chilli Thunderstruck
4.90 ★ out of 5
www.unibet.com Full T&Cs apply. 18+ begambleaware.org. New customers only. Min deposit £10. Money back as bonus if first sports bet loses. Wagering requirements: sportsbook 3x at min. odds of 1.40 (2/5), casino 50x. Unless forfeited the sportsbook bonus must be wagered before using the casino bonus. Bonus expires 7 days after opt-in. Visit Unibet.co.uk for full T&C's.

Depending on the types of slots games you like, you may be able to find demos of some of them. Remember that demo versions will not win you any real cash and that if the slot has a jackpot round, you will not be able to trigger it in the demo. But they are good enough to get a feel for the game before placing a real bet.

Real Money Slots

In this category, you will find a collection of many different types of slots machines both on- and offline. Technically any slot with the potential to award real money prizes can be in it, no matter whether it has 3- or 5 reels, whether it is vintage or innovative and so on. Playing real money online slots means that you will have to be extra picky when it comes to the security of the operator. We’ve cherry-picked 3 premium domains where you can play real money slots safely:

Best Online Casino: Sign Up Bonus: Top Real Money Slots: Casino Rating: Secure Link:
100% up to £200 + 50 Free Spins Rainbow Riches Pick’n Mix The Goonies
5.00 ★ out of 5
www.casimba.com Full T&Cs apply. 18+. New players only. Min deposit £20. Max bonus bet £5. Bonus spins on selected game only and must be used within 72hrs. Winnings from Bonus spins credited as bonus funds and capped at £100. Bonus funds expire within 30 days. Offer is 100% bonus match up to £200 + 50 Bonus spins on your 1st deposit, and 50% bonus match up to £50 on your 2nd deposit. Bonus funds are separate to cash funds & subject to wagering requirement (35x deposit + bonus). Only bonus funds contribute towards wagering requirement. Affordability checks apply. Terms apply. Please gamble responsibly. BeGambleAware.org
100% up to £300 + 25 Bonus Spins Eye of Horus 9 Lions
4.95 ★ out of 5
www.grand-ivy.com Full T&Cs apply. 18+. New players only. One bonus offer per player. Minimum deposit £20. Max bonus bet is £5. Bonus spins on selected games only and must be used within 72 hours. Bonus funds must be used within 30 days otherwise any unused bonus shall be removed. Bonus funds are 100% match up to £300 on your 1st deposit. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds contribute towards any wagering requirements. Terms apply. BeGambleAware.org
Wager £10 & Get £30 + 100 Free Spins Starburst Fishin’ Frenzy
4.90 ★ out of 5
www.betvictor.com Full T&Cs apply. 18+ Opt in. Wager £10 on selected games within 7 days of registering. Get 3x £10 bonuses, selected games, up to 40x wagering to withdraw max £750. 100 free spins on selected games, no wagering. Bonuses expire in 7 days. Card payments only. Click for T&Cs

Playing for real money also means that you will have to choose a reliable payment option. Paypal is the most popular payment provider amongst online casino players globally and for a good reason. It keeps your sensitive financial information hidden, and your bank statement will be gambling-free. And we all know you can’t be too careful when it comes to online transactions.

High RTP Slots

If you know anything about online slots, the first thing you probably look up when choosing new types of slots games to play is the RTP. The payout percentage is not the only important metric but, it sure gives you a good idea about the possible return. Find below the highest RTP slots at reputable online casinos:

Best Online Casino: Sign Up Bonus: Top High RTP Slots: Casino Rating: Secure Link:
Up to £50 Welcome Bonus A Night Out Rainbow Riches Cluster Magic
5.00 ★ out of 5
www.ladbrokes.com Full T&Cs apply. 18+. New Casino players only. Deposit required. Bet £10+ on qualifying games. 40x wager reqs (bonus only) on selected games. Accept Bonus within 14 days. Bonus valid for 30 days. Certain deposit types excluded. Player restrictions apply.
100% up to £300 + 25 Bonus Spins Immortal Romance Reel Rush
4.95 ★ out of 5
www.grand-ivy.com Full T&Cs apply. 18+. New players only. One bonus offer per player. Minimum deposit £20. Max bonus bet is £5. Bonus spins on selected games only and must be used within 72 hours. Bonus funds must be used within 30 days otherwise any unused bonus shall be removed. Bonus funds are 100% match up to £300 on your 1st deposit. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds contribute towards any wagering requirements. Terms apply. BeGambleAware.org
100% up to £200 + 50 Free Spins Buffalo Rising Megaways Dazzle Me
4.90 ★ out of 5
www.casimba.com Full T&Cs apply. 18+. New players only. Min deposit £20. Max bonus bet £5. Bonus spins on selected game only and must be used within 72hrs. Winnings from Bonus spins credited as bonus funds and capped at £100. Bonus funds expire within 30 days. Offer is 100% bonus match up to £200 + 50 Bonus spins on your 1st deposit, and 50% bonus match up to £50 on your 2nd deposit. Bonus funds are separate to cash funds & subject to wagering requirement (35x deposit + bonus). Only bonus funds contribute towards wagering requirement. Affordability checks apply. Terms apply. Please gamble responsibly. BeGambleAware.org

Paradoxically enough, most online casinos will not let you filter the best RTP slots so you’d have to spend hours on end checking and comparing RTPs. And if you are still wondering what RTP is, it stands for Return to Player. The higher it is, the better because it shows how much of the bets will be returned to the player in winnings (theoretically).

High Volatility Slots

Slot volatility or variance is another cornerstone metric used when expert players choose what types of slots games to play. It shows you how often you are likely to hit winning combos. So, low variance slots will constantly hit relatively small prizes, while high variance slots will not land wins often, but when it does, it will be a big prize. Here are our recommended high variance slots online:

Best Online Casino: Sign Up Bonus: Top High RTP Slots: Casino Rating: Secure Link:
Up to £50 Welcome Bonus Book of Dead Bonanza
5.00 ★ out of 5
www.ladbrokes.com Full T&Cs apply. 18+. New Casino players only. Deposit required. Bet £10+ on qualifying games. 40x wager reqs (bonus only) on selected games. Accept Bonus within 14 days. Bonus valid for 30 days. Certain deposit types excluded. Player restrictions apply.
Up to £500 + 10% Cashback Thunderstruck II Great Rhino Megaways
4.95 ★ out of 5
www.mansion.com Full T&Cs apply. New customers only. Min deposit £20 max bonus amount £500. First deposit: 100% up to £200. Second deposit: 50% up to £300. Wagering 40x for each bonus. Game weighting applies. Cashback: 5% cashback on first and all other deposits during week 1, 10% cashback on all additional deposits taking place in week 2 only. Bonus betting limits: slots - $/£/€5 all other games – 10% of bonus amount.
100% up to £100 Welcome Bonus Fluffy Favourites Buffalo Blitz
4.90 ★ out of 5
www.betfair.com Full T&Cs apply. Minimum deposit of £10, x45 wagering, Roulette and blackjack 50% weighting. Bonus Valid for 7 days. Not available to customers using Moneybookers/Skrill or Neteller as a payment method.

Think about your intentions when deciding whether to play high- or low-variance slots. Are you willing to risk a larger sum for a high reward, then go for high variance slots. Or you’d prefer your bankroll to last longer while you enjoy occasional small wins, then low variance it is! Remember that both RTP and variance are just theoretical values that are calculated over millions of spins. It may be your luckiest day today or not. Just choose a game that you would enjoy.

Online Slots with Progressive Jackpots

This is one of the favourite types of slot games for many players because of the potentially huge prizes. Progressive slots online work in a network where a small part of every bet goes to a pool, thus the jackpot keeps increasing until it’s won. Expect 5- even 6-figure jackpots and slots with various bonus rounds and functionalities. If you’ve never played progressive slots before, you may want to start with these 3 titles:

One thing you should know, though, is that with big prizes come bigger challenges. Compare the RTPs of any slots with two versions, a regular one and a jackpot one. You will quickly notice that progressive jackpot slots come with lower RTPs and very high volatility. This means that you have to be ready to wait out longer dry spells in the hopes of winning the grand prize.

3D Slots

3D slots have all the cool features of a classic slot but are also quite similar to a video game. So, they are visually very impressive and immersive. Usually, a story will be integrated into the slot, and you will see a video clip introducing you to the story. Or there will be leaves swirling in a sudden gust of wind in front of the reels. If this sound like fun, check out these 3D slots first:

When we say innovative slots, the 3D type of slots is definitely what we refer to. In our editorial team we are great fans of 3D slots, and we cannot hide it. But if you are more of an old-fashioned slots player, you’ll be pleased to know there are many offline slots games with online slot alternatives.

Mobile Slots

We are so glued to our smartphones and tablets that logically, most of the online gambling happens on mobile platforms and the industry has to adapt. There are even pay by mobile slots that are becoming more and more popular. If you like spinning the reels on the go, check out these three mobile slots:

Not only are almost all slots optimised for mobile devices nowadays, but also most software providers have a mobile-first policy, meaning that all new titles are launched on mobile devices first. So be sure that no matter what types of slots machines you like, you will find mobile-friendly titles.

Live Slots

A brand-new type of slots developed by the iGaming industry giant Playtech, live slots are both similar and different to the RNG ones. At first, we thought how on earth did they think it would be a good idea to place a person who will spin the reels instead of the player? But it turns out live slots are more about socialising with a community than anything else. The only live slot available now at online casinos is Buffalo Blitz Live.

To play it, choose the size of your bet, the loss limit and the number of spins and click on the autoplay button. It turns out the host will not be spinning the reels for you if you don’t specifically request them in the chat to press a manual spin button. While the game spins away, the presenter will encourage the players to communicate in the chat. An unlimited number of players can play simultaneously, so there will be busy hours.

Tips on How to Play Different Types of Video Slots?

We’ll wrap this guide on the most popular types of slots by providing some pro tips on how to enjoy playing slots the most. Slots are arguably not a game of skill, but you can still adopt an online slot strategy that may slightly boost your chances of winning. Check out our tips on how to make your slots experience better:

  • Choose Licensed Casinos – prioritise your safety and always choose trusted operators.
  • Play Responsibly – always start gambling with a good idea of how much you can afford to bet.
  • Activate All Paylines – your chance of hitting a winning combination is better if you activate all the lines.
  • Play High Payout Slots – theoretically, the higher the RTP, the better your chances are of winning.
  • Claim Bonuses – most online casinos have daily promos for their slots players featuring cash bonuses and free spins.

And finally, although it may seem obvious, start with the basics. If you’ve never played slots before, don’t just jump in thinking you will learn the rules while playing. Although slots are pretty straightforward, it’s so much more fun when you know why you’re winning. Start by learning more about slot machine symbols because they make up the winning combos.

FAQ

In our final section, we’ll provide answers to some of the most popular questions about the different types of slots machines. And if you are already a pro slots player, rest assured there are many new slots sites to play at, so you will never get bored!

🌐 Where to find the best types of slots online?

There are great sites to play the best type of slots that are safe and reputable. Just make sure they are licensed and regulated by an internationally recognised authority such as the UKGC, the MGA or the GBGA. Any reputable casino should have a rich enough slots portfolio so that you can find your favourite game.

♾️ How many types of slots are there?

It's hard to say because slots can be categorised in many different ways. Let's list 10 of the best types of slots so you can take your pick. 3- and 5-reel, free, real-money, progressive, high payout, high variance, 3D, live, and mobile slots are some of the best-loved types of slots games by online players.

🎰 What are the best type of slot machines to play?

There's no wrong answer to this question. It very much depends on your personal preferences and how much you can afford to spend on gambling. High RTP slots are definitely popular with players but there are many more types of video slots.

👑 What are the most popular slots?

5 reel online slots make up the biggest part of the game collections at most online casinos. They are so versatile that we can hardly list all types of slots with 5 reels. They can have different themes, features, bonus rounds and functionalities. Their symbols are various, and you will enjoy multipliers, wilds, and scatters, too.

🍒 What are 3 reel slots?

3 reel casino slots are typically found offline at land-based casinos. They are not so impressive in terms of graphics and mechanics used but have a devoted fanbase because of their simple gameplay. 3-reelers have fewer paylines and lower variance. You will find some of the best-loved 3 reel slots have been transformed into online games.

📓 How to play different kind of slots?

Slots are straightforward. You can literally go online knowing nothing about them, hit the spin button and play, but that would be no fun. Learn how to play different slots before you start spinning because this way, you will be able to take advantage of the various functions best.

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