Brand new
Our rating:
Developer: ELK Studios
Release date: 1st Oct 2024
Cluster Kingdom Slot - Screenshot
Grid Slot
RTP: 94.00%
Max Payout: 10,000x stake
Volatility: High
Min Bet: 0.20
Max Bet: 100.00
Reels: N/A
Paylines: N/A
Category: Grid slots
Jackpot: No

Cluster Kingdom

Paul Clare
Reviewed by Paul Clare Last updated:

ELK Studio’s Cluster Kingdom is set all the way back in mediaeval times, but its fascinating features are actually quite advanced. There are cluster pays, Sticky Redrops, Persistent Multiplier Wilds and 3 royal bonus rounds. The 10,000x max win would be a decent reward for even the most valiant of dragon-slaying knights.

Full review continued below ↓

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Our Rating

“A mediaeval Holy Grail of a slot”

4.1 out of 5

Features
8.5/10
Design
8.2/10
Gameplay
8/10
Win potential
8/10

Cluster Kingdom Review

Mediaeval gambling with a Monty Python twist. I’m sold. This comical olde slot seeks as much to entertain as it does to fill your little leather bags of money with… money. With so many engaging features and win potential, ELK Studios’ Cluster Kingdom could be a hit for the ages.

A screenshot of Cluster Kingdom slot gameplay

Gameplay & Features

This is a cluster-pays slot, so you don’t have to worry about your winning combinations starting from the leftmost reel. You just need at least 5 symbols to be touching horizontally or vertically. Whenever you hit a win, those symbols disappear and their positions will respin, thereby allowing for more potential wins.

There are 5 different pay symbols. If you manage to land 20 or more of the same symbols, you can win between 25x and 250x the bet. The Wild substitutes for all the above symbols and is as valuable as the most valuable pay symbol when functioning as a pay symbol itself. 

A screenshot of Cluster Kingdom slot feature gameplay

Multiplier Wilds & Sticky Redrops

Multiplier Wilds will multiply any winning combinations they’re a part of. They also stick to the grid until there are no more respins. If 2 end up next to each other, their values multiply together. 1 Wild is left with that total multiplier value, while the other reverts to being a standard Wild.

If a Sticky Redrop symbol falls, it will turn into a random pay symbol. All instances of that symbol stick to the grid, and the other positions respin. If more instances appear, they stick and there’s another respin. 

This continues until no more instances of that symbol appear. That’s when you’ll collect the value of the now presumably massive winning combinations on the grid. Any other winning combos that may have appeared beforehand are not collected.

The Princess symbol adds 1 to 4 Wild symbols to the grid. The Queen symbol moves around herself and other nearby symbols. The King symbol will turn all instances of a nearby low-pay symbol into instances of a nearby high-pay symbol.

Bonus Game

A King Symbol next to a Princess symbol triggers the Mini Bonus, where you get 3 free spins and a Sticky Multiplier Wild whose value increases by +1 with every win it’s a part of. If a Multiplier Wild isn’t part of a win, it’ll move to another grid position. 

A King next to a Queen triggers the standard Bonus, which awards 6 free spins. In the base game, if a King and Queen are on the grid but not next to each other, the Queen will move 1 position closer with every respin. 

If all 3 end up next to each other, you trigger Super Bonus, which awards 6 free spins plus a guaranteed Sticky Multiplier Wild.

Players outside the UK will probably be able to buy instant access to certain features via the X-iter function. Sticky Redrops, Mini Bonus, Bonus and Super Bonus cost 10x, 50x, 100x and 500x respectively.

I found it was quite tricky to hit decent wins from just standard winning combos. Thankfully, the game’s features trigger quite often, and those can often turn a meagre win into a decent win.

I liked the Multiplier Wilds but Sticky Redrops was a little hit-and-miss. I was spinning a long time before I was able to trigger even 1 of the 3 bonus rounds – the standard bonus. Given how long it’d taken me, I was expecting a bigger haul, but it wasn’t my day.

Cluster Kingdom - Sticky Redrops

Sticky Redrops

A Sticky Redrop symbol will turn into a pay symbol. The reels keep respining provided another instance of that symbol falls. See how many of the same symbol you can amass.

Cluster Kingdom - Multiplier Wilds

Multiplier Wilds

These multiply the values of any wins they’re part of and stick until the end of any respins. Adjacent multiplier Wilds combine their values but only 1 inherits the total multiplier value. The other becomes a standard Wild.

Cluster Kingdom - King, Queen & Princess Feature

King, Queen & Princess Feature

The Princess adds 1 to 4 Wild symbols to the grid, The Queen rearranges herself and the symbols adjacent to her. The King transforms all instances of a nearby low-pay symbol into instances of a nearby high-pay symbol.

Cluster Kingdom - Bonus Round

Bonus Round

When the King is next to the Princess, this triggers the Mini Bonus. The King next to Queen triggers the bonus, and all 3 together trigger the Super Bonus. Enjoy free spins and sticky Wilds with increasing multipliers.

Win Potential

This definitely plays like a game with high volatility. The relatively low RTP of 94% is a familiar sight now. In the base game, decent wins were few and far between, even when I managed to trigger the features. 

I was a little disappointed by my haul from the Bonus round, too. I think that was just my bad luck, though. I can see how I could’ve done better on another day.

The max win is an attractive 10,000x! 

A screenshot of a big win in Cluster Kingdom slot

Design

The setting is a top-down view of a wooden table. Coins and dice are scattered over it, giving us the impression that some bets are being placed in relation to the cards of the 5x5 grid. 

The plodding mediaeval music is enjoyable – it has a nice melody and fits in with the game’s overall theme. It gets pretty epic in the bonus rounds.

Even though the aesthetic is very basic, the graphics are decent. If you have a close look, you can see the weave of the different card symbols. The animations of the fluttering grid positions are good, too. 

The smartphone experience is very much the same as that of desktop, but certain features can make the game hard to follow at times.

Our Verdict

A fun but potentially very cruel game for your balance if you don't pay attention. If you like high volatility, intriguing features and Monty Pythonian tomfoolery, ELK’s Cluster Kingdom is definitely for you.

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