Whilst many people decide which slot to play based on the theme, special features or promotional offers, the savvy gamblers steer towards slots with the highest RTP. The house edge of online slot machines can vary widely, and it stands to reason that the lower the house edge, the better your chances of winning.

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In the table below, you’ll find 10 Grosvenor Casino slots that stand out against hundreds of other games. We’ve also highlighted the slot with the highest RTP (return to player) payout rate and the best features for each game. Our best Grosvenor slots RTP is currently Jammin’ Jars at 96.83%. The NetEnt Slots RTP List below shows the RTP (Return to player) percentage for each and every slot from this provider. The RTP’s listed are base don 1 million spins and take into account the house edge. Please note that any listed RTP is a house edge based on millions of individual spins. This page is for you to use as a guide only, always remember that the house always wins in the long.

Top RTP Slots	RTP	Bet Limits	Free Spins	Paylines	Rows	Reels
Jack Hammer 2	97.10%	£0.50 – £250	10-20	99	3	15
Simsalabim	97.50%	£0.25 – £125	Yes	25	3	5
Retro Reels Extreme Heat	97.50%	£0.30 – £112.50	Up to 20	30	3	5
Devil’s Delight	97.60%	£0.20 – £40	Yes	20	3	5
Kings of Chicago	97.80%	£0.05 – £50	Up to 30	5	3	5
Starmania	97.87%	£0.10 – £20	10	10	3	5
Blood Suckers	98.00%	£0.25 – £50	10	25	3	5
1429 Uncharted Seas	98.60%	£0.10 – £100	25	50	3	5
Jackpot 6000	95.10 – 98.90%	£1 – £2	No	5	3	3
Mega Joker	99%	£1 – £5	No	5	3	3

Of course, you should keep in mind that only the best slot sites to win offer high payout games from which you can take advantage. The return to player percentage of a game is measured over thousands of game rounds, and it stands to reason that the higher the RTP, the better the deal for the player. With this in mind, I have decided to create a list of the 10 online slots with the highest RTP.

#10 Jack Hammer 2 (NetEnt) – 97.1% RTP

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Jack Hammer 2 is the first of many NetEnt slots to make this top 10 list. This entertaining slot has a crime and adventure theme, captured in a comic book style. There are an impressive 99 bet lines in this game, providing plenty of opportunities to win. It also boasts a variety of interesting features that make the game exciting to play, whilst creating chances to win. The Sticky Win feature sees any winning symbol combinations held in place for a free re-spin, and they continue until no new wins are created. There is also a free spin feature, where you get up to 20 free plays, where all wins are doubled and extra wilds randomly land on the reels. Jack Hammer 2 has a player-friendly RTP of 97.1%

#9 Simsalabim (NetEnt) – 97.5% RTP

This magical themed slot recreates all the excitement of a magic show. The stage is set, with symbols such as a magician’s wand and top hat, a caged dove and a Houdini-style chained chest. The hypnotist is wild, helping to complete winning symbol combinations. When you play Simsalabim, keep your eyes peeled for 3 bunny rabbit symbols on the first 3 reels. These trigger the bonus game, where you pull rabbits from the hats to reveal cash prizes of up to 50500 coins. The slot also features a free spins round, which provides the potential for big wins thanks to the triple payouts. All these features combine to provide a great RTP of 97.5%.

#8 Retro Reels Extreme Heat (Microgaming) – 97.5% RTP

The RTP of 97.5% is one of the highest you will find in the Microgaming slots selection.Retro Reels Extreme Heat has an old-school feel, with symbols you’d expect to see on a classic fruit machine, including cherries, lemons, bells, bars and 7’s. At the same time as providing a retro feel, it includes many features which you’d expect from a modern video slot. There is a free spin bonus, where you can get up to 20 free plays with all wins doubled. There are also wild substitutions and scatter pays. A highlight is the innovative re-spin feature. After any spin, you can choose to spin just one reel, which allows increased chances of winning.

#7 Devil’s Delight (NetEnt) – 97.6% RTP

Unleash your inner devil in this NetEnt video slot. Set against a fiery backdrop and tombstones, the 5 reels are filled with symbols from the underworld.Devil’s Delight is packed full of exciting features that provide plenty of chances to stack up the wins. The devil wild expands to cover entire reels. Whilst the free spins bonus features win multipliers of up to x5. Yet the real highlight of the game is the unique Soul Reaper bonus game. Match the correct sin to each character their soul will be added to the Soul-O-Meter whilst you reap a coin prize. When the Soul-O-Meter is filled with 15 souls, the Sin Spins feature is activated. Here, you get 10 Sin Spins where you can pocket some juicy rewards. With so many cool features and a high RTP of 97.6%, this is one hell of a slot!

#6 Kings of Chicago (NetEnt) – 97.8% RTP

Kings of Chicago mixes the best elements of a video slot with classic poker. The game is played with a deck of cards, which is shuffled before each round. Unlike normal slot machines, where payouts are made for matching symbols across paylines, in this slot, you win if you have a poker hand on one of the five paylines. The game includes a joker, which substitutes for all cards. Plus, the scatter label can randomly appear on any card. Get 3 or more and free deals, the equivalent of free spins are triggered. You can bag up to 30 free deals in the special feature and all wins are doubled. This innovative slot machine provides a unique twist on what you expect from a video slot, and boasts an impressive RTP of 97.8%.

#5 Starmania (NextGen) – 97.87% RTP

With colourful star symbols set against a pretty outer space background and a spacey, ethereal soundtrack, this NextGen slot is a real treat for the senses. Wilds are stacked onto the reels boosting your shot at winning combinations. There is also a free games feature, where extra stacked wilds can help create some big wins. The game features 10 paylines and wins are paid in both directions. With every line win, you also have the option to gamble your prize, for a chance to double or even quadruple your win multiple times. The great graphics, exciting features and favourable RTP of 97.87% make Starmania a real hit with players.

#4 Blood Suckers (NetEnt) – 98% RTP

The vampire genre has never been more popular, and it is the inspiration for this spooky NetEnt slot. You’ll see various Blood Suckers adorning the reels, along with the weapons to fight them off. It is not merely the impressive 98% RTP that draws players to this slot, but also the rich selection of special features. There are wild substitutions, scatter pays, free spins with triple payouts and a vampire slaying bonus game. Trigger the bonus and you will find yourself in an ancient burial chamber, filled with coffins. Open the coffins to slay vampires, earning coin wins with each creature you defeat.

#3 1429 Uncharted Seas (Thunderkick) – 98.6% RTP

This video slot from Thunderkick is visually stunning. The reels are replaced with a medieval style hand-drawn map and the symbols include a variety of sea creatures and beasts as well as sun, moon and star symbols. The slot includes a wild symbol which expands to cover entire reels, helping to create bigger wins. There is also a free spins bonus where you can earn up to 50 free goes. 1429 Unchartered Seas has a rewarding RTP of 98.6%, one of the highest you will find in a video slot, making it a popular choice with players.

#2 Jackpot 6000 (NetEnt) – Up to 98.8% RTP

Jackpot 6000 is a thrilling classic slot machine from NetEnt with a real old-school vibe. You can play with up to 5 paylines active, betting between 1 and 10 coins per spin. It is highly recommended to play with the maximum bet of 10 coins however, as this creates the possibility of triggering Supermeter mode. In this game mode, you can win a mystery prize of between 10 – 6000 coins when just 2 joker symbols land anywhere on the reels. Also, getting 3 jokers on a payline in Supermeter mode guarantees a jackpot payout of 6000 coins. When you play Jackpot 6000 with 1 – 8 coins, the RTP is a paltry 74.9% – 79.2%. Yet with 10 coins in play, the RTP ranges from 95.1% – 98.8%. The variance is because Supermeter mode is skill based, so you can directly impact the outcome.

#1 Mega Joker (NetEnt) – Up to 99% RTP

Whilst Jackpot 6000 boasts an extremely high RTP, it is just beaten to the top spot by another NetEnt classic slot; Mega Joker. Bet with just 1 coin and the RTP is an underwhelming 76.9%. Yet on the other hand, a max bet of 10 coins elevates the RTP to between 89.1% – 99%. Furthermore, it provides bigger payouts and the Supermeter mode. In Supermeter mode, you need to choose the bet level and the optimum level at which to collect your winnings. It is this element of skill which can increase the RTP. The skill component, retro style and engaging gameplay make Mega Joker a firm favourite with players.

Frequently Asked Questions

Because our goal is to keep you well informed we have put together a list of the most frequently asked questions and our team of experts has provided the answers below.

🏆 What are the best paying slots?

The best paying slots are the ones that feature a high RTP because that translates to a small house edge such as NetEnt’s Jack Hammer 2 slot or Simsalabim, with a return to player percentage of over 97%.

✍ How do I choose a good slot machine?

In choosing a good slot machine a player should look for high payouts, volatility and the features of the game itself. For example, you are bound to have a higher return on your investment while playing a slot with free spins and multipliers.

💱 What is the average payout on slot machines?

The average payout on slot machine varies among slots but you are going to find a higher return-to-player percentage in the recommended online casinos as compared to the traditional slot machines. Blood Suckers slot and 1429 Uncharted Seas slot have a very high RTP of over 98%.

🎰 What is a high variance slot machine?

High variance slots are destined for gamblers who are willing to play for huge wins.Kings of Chicago is a great example in that direction because it features not only a high RTP but also a high variance, which makes it ideal for our example. Flexible betting limits, free spins and a unique twist on slots as we know them are just a few perks of enjoying this title.

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The online slots industry is literally buzzing at the minute. There are thousands to choose from and the competition between the developers just seems to be increasing.

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Competition is a good thing for the punters as it means not only has each game got to be better than the last, but they’ve also got to be more player orientated. One of the ways that they make games more player orientated is by adjusting small elements within them such as the RTP.

For those that don’t know, RTP stands for Return To Player and this is essentially the house edge that each slot carries. The numbers range massively for slots, so it’s important to make sure that you get the best deal by taking the house edge into account.

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As more games hit the market, we are definitely seeing a trend of the RTP increasing for newer games. More players are aware of what RTP means to them, and given that there are so many games to choose from it makes sense that clued up players are targeting higher RTP’s to give them the best chance of winning.

What is RTP?

We won’t go into too much detail here as we’ve spoken about it so many times and even have a full article on this and variance here.

For those that don’t know, the RTP is the rate that the game pays back to the player. This number is represented as a percentage and often around the 90-98% mark for modern day slots.

The easiest way to get your head around this is to take the number as the amount paid out per £1 staked. So, a game with a 95% RTP would pay out 95p for every £1 staked, with the casino keeping 5p of that stake. Theoretically, anyway. The RTP is calculated over millions of test spins so won’t apply literally to a session of a few hundred spins.

Obviously, as we get higher rates, the amount the casino takes is lower and the amount that the player takes is higher. The smart thing to do then would be to make sure the games you play have a high RTP.

One thing that we do want to flag is not to get a low RTP mixed up with a low volatility slot, as these are very different things. The volatility of the slot is more about how the game works in terms of frequency of payouts and the amount paid out. The RTP is the fixed amount that is paid out over a huge sample of spins.

Is it Ever Worth Playing Low RTP games?

If you can help it then you want to steer clear of them. Why would you want to purposely give the casino a bigger edge than they already have? You don’t, so it makes sense to avoid them.

Sometimes a slot with a low RTP could have other features to tempt you, like a jackpot for instance, so in those situations you have to weigh up the pros and cons.

Realistically though, based on the number of spins you are likely to make, you’re unlikely to feel any effect in terms of RTP. The percentage is worked out over millions if not billions of spins and then adjusted accordingly. If you play online slots once a week for 30 minutes, then the RTP is unlikely to influence your experience much.

How Low do the Games Go?

First thing to note is the difference between brick and mortar slots and online slots. The old pub fruity games can dip into the 70% range, which is pretty shocking to be honest. However, before online gaming this was very much the norm, so it just shows the monopoly things like fruit machines used to have in bars and clubs. In fact, next time you’re out, take a look in the top right-hand corner of your nearest fruit machine and prepare to be shocked.

Online numbers are much higher, although some are still pretty poor. You’re going to be looking at slots that start from about 85% at the bottom end and work their way up. These games are painfully low and should be avoided at all costs.

What Game Types are Lowest?

Without doubt the ‘type’ of slot with the lowest RTP is that of progressive jackpots. These games offer huge sums of money that could change your life forever, but overall, as a standalone slot they are pretty terrible value.

Mega Moolah by Microgaming is one that standouts, with an appallingly low 88% RTP rate. However, it also happens to be on of the developers most popular games.

Obviously, the payoff is in the big jackpot up top, but it all needs to be taken into account. It comes down to whether you think the trade-off is worth it.

Do Games Have Different RTP’s at Different Casinos?

They shouldn’t really, but it can happen.

There will be many times where you are able to play the same game at different casinos. This is because the casinos don’t actually make the game, instead they buy the rights from a game developer and then host it on their site.

If you find that one casino has the same game at a different RTP than the other, then you should look to play at the casino with the higher rate. The move to lower the rate is a naughty tactic that some casinos employ with certain games.

As a result, not only should you avoid playing the game, but you should probably avoid the lower paying casino too, as it is obviously not trustworthy.

Jump ship and play somewhere else.

Can the RTP Change?

Yes, the RTP can vary depending on what type of bets you place, but this should be noted in the info.

A good example of this is from the Greatest Odyssey slot which is made by PlayTech. The RTP changes on from 94.09% to as low as 73.57 depending on which bet you place, so you really do need to read the rules before you start spinning.

Whilst this isn’t the norm for most slots, it’s more common that you might think, so keep a look out for these types of games.

Lowest RTP in the Industry?

Here is a list of some of the worst slots in the industry for RTP. It’s worth noting that these RTP’s are ‘from’ meaning that they can be as low as this for certain bets but could also be higher.

Adventures in Wonderland

This one is actually ok to play, it serves the theme well and has a progressive jackpot attached which explains why it’s still being played. The RTP is just 86.40% without the jackpot though, and only goes up to a max of 88% with it. At least it has a few good bonus rounds.

Mega Moolah & Mega Moolah Isis

Only saved by their progressive jackpots, these two come in at 88% and 88.02% respectively. In other words, there is no reason to play these games unless you are jackpot hunting. It’s a famous favourite though, and has paid out millions upon millions in its time.

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Lucky 5 Reeler

This one from Barcrest actually plays quite well. Again, it’s dated, and the RTP of 87.80% isn’t doing it any favours, but every spin is actually 5 spins in 1, and wins are frequent although not always worth a lot. It’s a decent effort but it wouldn’t catch your eye over many others.

Fortune Jump

It’s old, it’s a bit generic in theme, and the graphics are uninspiring – especially considering it’s a Playtech title. Alongside a meagre 89.20% RTP that doesn’t leave many reasons to play. There is a bonus round that can be pretty rewarding, but getting into it is nigh on impossible.

White King

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Another from Playtech, this time bearing a 90.05% RTP. We’re moving in the right direction but there are many slots that leave this one in the dust. Stacked wilds and a bog standard freespins round aren’t enough to make up for this low RTP.