
Best Cluster Pays Slots (Highest RTP/Payouts) + Feature Explained
Nine times out of ten, to get you a win per line, paying symbols must appear on the reels in strict order. There are often two conditions must be met:
they have to form some pattern (called payline)
moreover, often only paying symbols from the left to the right are deemed an eligible win (though there are a small portion of win both ways slots)
The Cluster pays feature is very different in that sense:
there is no predetermined pattern (payline) needed to get you a win
there is no “from the left to the right order” limitation
The only thing you need is that some number of symbols (usually 5-6) appear anywhere on the reels adjacently. To be deemed as “adjacent symbols”, symbols must be connected with their both 2 angles (2 angles form one whole side so it is fair to say that symbols must be connected by their sides, just one angle is not enough).
Anyway, let’s take a look at the slots list and discuss how it works further in detail.
Best Paying (RTP) Slots with 0 Paylines
(Players from United States are welcome)
Full list of Cluster pays slots
How exactly Cluster pays works
Let’s take a look at what exactly the word “adjacent symbols” may mean.
Any symbols can be connected (be adjacent) with each other in basically either of these 2 ways:
- Either by one angle

- Or by two angles or the whole side

Why am I bringing up all that stuff? Because the Cluster pays feature requires symbols to be connected only by both angles (the whole side) to be considered as an eligible cluster. Just one angle connection is not going to be enough.
I hope now it is crystal clear how the feature works.
What’s special about Cluster pays slots

It usually takes minimum 5 adjacent symbols appearing anywhere on the reels to form a winning combination. However, there is no consistency across the board of software providers, so, for example, Netent’s Aloha! requires minimum 9 symbols to get you a win.
Cluster pays slots are always modern games (2016+), nice looking and well implemented as a result.
Cluster slots basically pay both ways unlike the majority of online slots that pay from the left to the right.
Moreover, there is no limitation where the symbols must appear, so it can be even in the middle of the layout or anywhere else. The only rule, as we have already discussed, they must be connected by 2 angles.
The majority of Cluster pays slots do also implement Cascading reels feature, which definitely brings much more fun to the table.
The Buy bonus game feature is something that you can get fairly often in Cluster pays slots as well.
Best 5 Cluster pay slots of all time
Aloha! (Netent)

I guess everybody agrees that x10,000 win slot with low Volatility level at the same time is a rare thing to have (Volatility has been estimated by NEtent itself by the way). Other than that, exactly this slot has given a start to Cluster pays feature (and now it is NEtent’s registered trademark).
Paylines: Cluster RTP: 96.42% Volatility: Low Free spins: Yes Multiplier: No
Maximum possible win: x10,000 (of your stake) Cluster Symbols required: 9
Sweet Bonanza (Pragmatic)

play Sweet Bonanza for real money
Sweet Bonanza is a product of Pragmatic Play company. It has decent RTP, looks really well, and, what is more important, allows players to win very thrilling x21,100 of your total bet.
Paylines: Cluster RTP: 96.51% Volatility: Medium-high Free spins: Yes Multiplier: Yes
Maximum possible win: x21,100 (of your stake) Cluster Symbols required: 8
Reactoonz (Playngo)

Reactoonz is a Playngo hit. It is a well-balanced game in terms of both RTP and maximum possible win. However, please keep in mind that RTP of all Playngo slots may be set at 5 different levels so you are supposed to check it in each online casino separately (here is an article how to do it).
Paylines: Cluster RTP: 96% Volatility: High Free spins: No Multiplier: Yes
Maximum possible win: x4,750 (of your stake) Cluster Symbols required: 4-5
Golden Glyph (Quickspin)

play Golden Glyph for real money
Golden Glyph is an amazingly looking Quickspin product, which is one of the leaders in the industry. It requires only 5 clustered symbols to form a winning combination which is a bit lower than on average.
Paylines: Cluster RTP: 96.19% Volatility: Medium Free spins: Yes Multiplier: No
Maximum possible win: x13,185 (of your stake) Cluster Symbols required: 5
Pirates 2 Mutiny (Yggdrasil)

play Pirates 2 Mutiny for real money
Pirates 2 Mutiny is a Yggdrasil game (this company is my top 2 favorite software provider after Netent). It has a decent maximum possible win of x4,400 of your stake, and High volatility level at the same time. Its RTP is a bit lower than on average, that’s why it is ending the rating.
Paylines: Cluster RTP: 96.2% Volatility: High Free spins: Yes Multiplier: Yes
Maximum possible win: x4,400 (of your stake) Cluster Symbols required: 7
Cluster pays feature’s impact on RTP, Volatility and Winning hit frequency
Those 3 parameters are truly the most important ones when it comes to online slot’s characteristics. Let’s see how RTP, Volatility and Hit frequency interact with the Cluster pays feature.
Cluster pays feature’s impact on RTP
There is no causation between those two. However, Cluster pays slots are newer ones so their RTP tends to be rather decent.
Cluster pays feature’s impact on Volatility
Cluster pays slots are known for their sometimes even huge wins. Hence, the volatility level of such games is naturally going to be rather high.
Cluster pays feature’s impact on Winning hit frequency
As a result of high volatility you have to be ready for a bit lower hit frequency than on average on the market (on average it is around 20-30%).
Some other interesting facts about Cluster pays
In some games (like Reactoonz), if 4 symbols form a square it is already enough to get you a win (instead of 5-7 which are required normally). On top of that such a winning got multiplied.
Netent is the best software provider (in my humble opinion) that has got Cluster pays slots in its portfolio. On top of that some other leaders on the market produce Cluster pays games, such as, Yggdrasil, Pragmatic, Playngo.
Also Netent has first introduced the Cluster pays feature to the market with its Aloha slot. So Netent is a pioneer here.
Cluster pays slots can be considered as Megaways slots by their spirit, because both groups basically pay any ways. Though technically they are not called Megaways as a rule of thumb.
I have never come across a Cluster pays slot with network progressive jackpot at the same time.
Conclusion
Cluster pays slots are very nice in general so there are almost only advantages to be discovered with two insignificant disadvantages.
pros:
decent RTP in general
usually high volatility (which is actually a good thing for players)
modern slots with high quality of graphics and sound
many modern features are also often implemented (Buy bonus, Cascading reels, etc.)
some slots allow to win big
cons:
it might be hard to keep track whether you win or not
not too many offers on the market (though it is only in comparison since there are dozens of them available)
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