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Online Casino - Best Casino Games & Slots Casino OnLine is a recommendation service for casino online bonus offer and promotes the online gambling establishments that have attained the highest ranking in our reviews. Feb 21, 2020 Most online slot players won't even consider a slot game if it isn't a bonus slot. Basically, this type of online slot machine gives bonus spins when you land 3 or more symbols. Although most popular games offer this, Machina Megaways is one of the more recently launched examples of this.

Online slots are a very enjoyable way of passing the time, especially from your mobile phone while on the bus stuck in traffic. This form of entertainment has grown exponentially over the last few years with hundreds upon thousands of players now playing these types of games than ever before. They are not only fun to play but also offer plenty of cash prizes provided that the reels are lucky for you of course! Read on as we take an in-depth look at some of the most popular slots that players all across the world are enjoying right now:

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Book of Dead – tomb raiding fun on the reels!

Book of Dead is a hugely popular online slot that's all about accompanying intrepid explorer Rich Wilde as he seeks out untold riches in the pyramids of Egypt. Featuring 10 paylines, a lucrative Free Spins round, plus special Expanding Symbols, it's one unforgettable gaming experience on the reels! Incredibly, the top prize for this game is a massive 5,000x your stake! Sign up with CasinoLuck right now and not only will you receive a fantastic 100% Welcome Bonus up to €150 but also 150 Spins on Book of Dead! See if you can help Rich Wilde finally get his hands on the legendary Book of Dead?

Starburst – an out of this world space adventure!

When you think of popular online slots then this game certainly springs to mind as it is, in fact, one of the most widely played slots of all time. This space-themed slot features incredible 3D graphics and comes with 10 paylines, Expanding Wilds, and lucrative Respins that combine together to send players to a galaxy far far away. With a reasonable top prize of 500X your stake on offer, it's one space adventure worth signing up for! Kick-start your Starburst adventure with CasinoLuck today with a 100% Welcome Bonus up to €150 plus 150 Spins on Book of Dead!

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Twin Spin – the ultimate fruit machine slot!

This uber-popular slot from NetEnt remains as popular as ever with players as to this day, it is still one of the most played slots ever since launching back in 2013. It's inspired by old-school fruit machine slots of the past and features 243 ways to win, Wild symbols, and a unique Twin Reel feature where two reels display exactly the same symbols. The maximum prize on offer here is a reasonable 1,080X your bet. Create a NextCasino account today to get your hands on an awesome 100% Welcome Bonus up to €200 as well as 100 Spins to enjoy on Twin Spin!

Bonanza – an explosive encounter on the reels!

This mining themed game comes from Big Time Gaming and is by far the most popular of all MegaWays slots. Featuring up to a gigantic 117,649 different ways to win, it's all about blasting the reels to cause Reactions so that you can keep on forming winning combinations here. There is even a fun Free Spins feature where you can benefit from Unlimited Free Spins as well! The top prize on offer here is a mouth-watering 10,000X your wager! Play Bonanza at NextCasino today to also get your hands on a superb 100% Welcome Bonus up to €200 plus 100 Spins on Twin Spin!

Wolf Gold – the beauty of the wilderness awaits!

This much-loved online slot comes from Pragmatic Play and is all about following the trail of an elusive wolf as you attempt to uncover lots of cash prizes along the way. Featuring sumptuous graphics, 25 paylines, and exciting bonus features such as Unlimited Free Spins, Respins, and Giant symbols, it's a thoroughly enjoyable online slot to experience that's for sure. The maximum payout here is a more than respectable 1,000X your wager. Seek out the wild wolf by playing Wolf Gold at WildSlots today where you can benefit greatly from a wonderful 100% Welcome Bonus up to €100 plus 100 Spins!

Reactoonz – fun with aliens guaranteed!

This quirky online slot is produced by leading software provider Play'n GO and is all about zapping aliens in outer space to win big cash prizes. Played on an innovative 7×7 grid, Reactoonz is chockful of entertaining bonus features including Low symbol transformations, Cascades, Intersecting Wilds, Extra Wilds, and Double Multipliers. The top prize on offer here is a whopping 4,570X your stake! Play Reactoonz at WildSlots today for not only the chance to win big on the reels but also to snap up a lucrative 100% Welcome Bonus up to €100 plus 100 Spins on the hit Play'n Go slot Book of Dead!

Hit that spin button!

As you can see players sure do love a bit of variety when it comes to online slots and each game listed above is bound to give you countless hours of entertainment. Naturally, we recommend trying out all of the above games as each one not only offers a unique gaming experience but also comes with some fantastic cash prizes up for grabs. All that's left to do now is to get spinning and as always we wish you the very best of luck on the reels!

The benefit of playing any of the highest payout percentage online slots is of course that you are going to get, over the long term, many more winning spins on those slot and will always get more play time from your bankroll and a much higher percentage of your stakes being paid out to you as winning pay-outs.

However, I can tell you for sure, that when you do go on the hunt for the loose online slots that are available to all slot players you can spend many hours, if not days checking out the RTP's of such slot games, and no player is going to want to waste their time.

Therefore what I have done in the following guide is to do all of the research for you, and as such I will now be presenting to you the highest RTP slots online, and will also let you know which game providers have launched and designed those slot games.

That will then put you in the position whereby you can track down any casino site offering those higher paying slot machines, and can pick and choose just which casino sites to play at, based on other factors such as bigger and better bonuses, generous comp clubs and rapid winning pay-outs too.

1. Mega Joker Slot – RTP 99.00%

With its certified RTP of 99.00% there really is a lot to like about the Mega Joker slot and whilst it is a slot with a 3 reel, 5 pay-line playing structure, it will be slot that you can always rely on to deliver you with plenty of winning pay-outs.

The Mega Joker slot can be found at all casino sites offering the ever-growing range of NetEnt designed slots, all of which are fully licensed and regulated by the way.

2. Jackpot 6000 Slot – RTP 98.90%

Having launched literally hundreds of great playing slot machines over the years, it will not surprise you to learn that the second top paying online slot by virtue of its RTP is another NetEnt designed slot, that being their Jackpot 6000 slot machine.

That slot, much like the one above has been designed as a basic playing 3 reel, 5 line slot, and you are bound to want to give it some play time sooner rather than later once you discover its long term expected pay-out percentage is a whopping 98.90%.

3. 1429 Uncharted Seas Slot – 98.60%

Whilst the first and second slots with the highest RTP's are the older styled classical slots, there are plenty of video slot games that do come with above average pay-out percentages, and the next one worth tracking down and playing is the 1429 Uncharted Seas slot.

That is a slot on which some huge winning pay-outs can be achieved via both its base game and bonus game, which is a set of free spins, and it's a multi denomination slot game too and one has been designed by Thunderkick and has a verified RTP of 98.60%.

4. Blood Suckers Slot – 98.00% RTP

Never be under the impression that you are going to have to pay the slots boasting the very highest pay-out percentage online for high stakes, and each of them do come with fully configurable staking options, that put you in full control over the stake levels you can play them for.

If you do find yourself playing at a casino site offering you the range of NetEnt designed slots, then do make sure that you give the Blood Suckers slot game a whirl, for by doing so you will be playing a Vampire themed slot and one with a high RTP of some 98.00%

5. Starmania Slot – RTP 97.87%

Low to medium variance slots are as popular as ever with slot players, as too are the range of NextGen Gaming designed slots, and you will find that all their slots have stunning graphics and some very highly advanced sound effects too.

You are not going to have to look too hard to find a casino site offering their range of slot games, but one that you should be making a beeline to play is the Starmania slot, which has been set to return to plays over the long term 97.87% of their stakes as winning pay-outs.

6. Kings of Chicago Slot – 97.80%

I do hope you have now got plenty of slot games to add to your list of higher paying online slots, however there are still plenty of other slots that are going to be worth checking out and playing, such as the Kings of Chicago slot game from NetEnt.

That slot is unusual in as much as the reel symbols are all playing card symbols, and I would advise you to read through its pay table to get an idea of the very unique winning combinations that can be spun in and formed when playing it online and the bonus game on offer too, for you will find it a fun slot to play and a higher paying slot too thanks to its 97.80% RTP.

7. Devil's Delight Slot – 97.60%

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When it comes to finding the best slots to play online, the devil is always in the detail, which is a great introduction for the next slot with a higher than average pay-out percentage that you can play online that being the Devils Delight slot.

A fun to play video slot that does of course offer players all the unusual play configurable option settings which include a speed play setting and auto play option, and one thing you will love about that devilishly good NetEnt designed slot games is its 97.60% RTP.

8. Retro Reels Extreme Heat Slot – 97.50%

There is no doubt in my mind, that many of you slot players out there will have played Microgaming designed video slots before, and probably do always tend to play them regularly too, and they can be accessed by a downloadable and instant play gaming platform and a mobile casino app too.

One slot that you need to get stuck into playing to have the maximum winning chances at any casino site offering Microgaming designed slot machines is the Retro Reels Extreme slot, as it is a video slot on which you will find an RTP of a fabulously high 97.50%.

9. Simsalabim Slot – 97.50%

It isn't too unusual to find more than one online slot that has been set to return a pay-out percentage of the exact same amount as some other slot games over the long term, and as such allow me to introduce you to another slot that comes with the same RTP as the above slot.

That additional slot though is part of the NetEnt collection of video slots and goes by the name of the Simsalabim slot, it's a slot also boasting a magic type of themes and its RTP of 97.50% should ensure you get a fair amount of play time out of your gambling budget too.

10. Jack Hammer 2 Slot 97.10%

There are now two slot games from NetEnt that make up the Jack Hammer series of slots, however I should point out that if you have only played the original version of that slot you really do owe it to yourself of play the second slot in the series instead.

The reason for me saying that is that the Jack Hammer 2 slot is a game that boast a slightly higher and much more appealing RTP than that of the original game, and for reference that long term expected pay-out percentage has been set at 97.10%.

Single Session Slot Game RTP's

One final aspect to playing slot machines, including each of the top 10 slots with the highest RTP's that all players do need to be fully aware of, is that those slots are completely random, and as such you could win or lose when playing them.

On any one single slot playing session, that does of course mean that even though for example a slot such as the Jack Hammer 2 slot has been set to return a pay-out percentage of 97.10%, you are unlikely to achieve that exact pay-out percentage on every session that you have playing it.

But over the long term the more that you do play any slot the much more likely you are to achieve its pre-set RTP, and you could of course achieve a pay-out percentage of over 100% or a pay-out percentage much lower than the one it has been set to return to players.

However, make no mistake about it, when you do set about playing low paying and higher paying slots you are soon going to notice the difference in the type of gaming session you do have, as you are much more likely to spin in many more winning combinations, and trigger many more potentially huge paying bonus game feature rounds when playing those slots with the highestpaybacks.

So make sure that you do have each of those slot games listed up above higher up on your list of slots to play online, when you next fancy spinning some slot game reels online, as they are the very best ones you can play currently.

David is the editor-in-chief at casinosx.com and has been involved with the casino industry for 15+ years. Working on a number of sites he enjoys helping out other casino players with his guides and tips and tricks to help everyone get the best value for money when playing online.