Cluster Kingdom (ELK Studios) – Review & Demo Play

The Cluster Kingdom Slot Game

Set on a tabletop with gold and silver coins showing the royal pair, Cluster Kingdom flips five cards across five reels to reveal twenty-five symbols on each spin. Wins land via clusters of five or more matching symbols that are adjacent. After a hit, the winning symbols and all non-winning identicals are removed and replaced with new ones, though they do not cascade downwards. The mediaeval vibe works well, and the heavy metal during big win counts gives the base game a proper rush.

Symbols and Payouts in Cluster Kingdom

Cluster Kingdom keeps it simple with five regular-paying symbols: wheat, tree, windmill, house, and castle. A cluster of five of a kind pays between 0.1x and 1x the bet, while landing twenty or more matching symbols awards between 25x and 250x the bet. A win consisting only of wild symbols pays as the highest value pay symbol. You do not need paylines here, just adjacent connections horizontally or vertically to form clusters that can expand when the grid refills after wins.

The paytable outlines each symbol clearly. Wheat pays from 0.1x up to 25x, Fruit Tree from 0.2x up to 50x, Windmill from 0.3x up to 100x, House from 0.5x up to 150x, and Castle from 1x up to 250x for the biggest clusters. Wilds substitute for any paying symbol, and multiplier wilds do the same while carrying values that apply to wins they are part of. These can be decisive in the larger cluster outcomes.

Cluster Kingdom Symbols and Paytable

Symbol	Quantity	Payout
	20+	x250
	15+	x100
	7	x2
	6	x1.5
	5	x1
	20+	x150
	15+	x50
	7	x1.5
	6	x1
	5	x0.5
	20+	x100
	15+	x40
	7	x1
	6	x0.5
	5	x0.3
	20+	x50
	15+	x20
	7	x0.5
	6	x0.3
	5	x0.2
	20+	x25
	15+	x10
	7	x0.3
	6	x0.2
	5	x0.1
	Wild, Multiplier

Cluster Kingdom Slot Bonus Features

Sticky Redrops are a centrepiece. When the sticky redrop symbol lands, it selects one paying symbol, and all matching symbols on the grid become sticky while the rest redrop. If at least one new matching symbol appears, you get a further redrop, and this repeats until no new matches land, at which point the payout is settled. Wilds and multiplier wilds are persistent during sticky redrops, while feature symbols remain inactive until that sequence ends.

Multiplier wilds substitute and apply their displayed values to winning combinations they join, and they stay sticky until the end of the round. When two multiplier wilds sit next to each other, their values multiply together and the total is added to one of them, with the other downgraded to a regular wild. This interaction can snowball during redrops and free drops, turning medium clusters into board-clearing results when values stack in the right spots.

Three feature symbols drive the theme. The Princess places one to four wilds, and if the King is visible she moves a step towards him after each win before refills. The King upgrades the lowest paying adjacent symbol type to the highest next to him. The Queen rearranges symbols and steps towards the King when he is visible. King and Queen adjacent award six free spins with persistent multipliers. Princess, Queen, and King together give six super free spins with increasing multipliers, while Princess and King adjacent give three spins.

Bonus Buy Feature

Bonus Hunt
Feature Cost:	x3 Bet
RTP:	-
Volatility:	-
Sticky Redrops
Feature Cost:	x10 Bet
RTP:	-
Volatility:	-
Mini Bonus
Feature Cost:	x50 Bet
RTP:	-
Volatility:	-
Bonus Game
Feature Cost:	x100 Bet
RTP:	-
Volatility:	-
Super Bonus Game
Feature Cost:	x500 Bet
RTP:	-
Volatility:	-

Feature Buy (X-iter) in Cluster Kingdom

The X-iter menu offers five buys: Bonus Hunt 3x bet, Sticky Redrops 10x, Mini Bonus 50x, Bonus Game 100x, Super Bonus Game 500x. Bonus Hunt more than triples the chance of triggering a bonus round. Sticky Redrops buys a spin with the feature active. The three bonus buys start straight into their respective free drops, with persistent multipliers where applicable. I use these when I want to shortcut the base game and target the higher rungs of the feature ladder.

How to Win at Cluster Kingdom Slot

This is a straightforward cluster win system across five reels and five rows. I aim for blocks of five or more identical, touching symbols anywhere on the grid, as clusters pay regardless of paylines. Bets start at 0.20 and go up to 100, so I set a stake that matches my bankroll and let the refills do the work. Autoplay can help run sessions, but sticky redrops and feature symbols are the real swing points that turn small hits into rounds that matter.

Cluster Kingdom Slot RTP & Volatility

Cluster Kingdom runs a 94.0% RTP with mid-high volatility, a hit frequency around 25.0%, and a max win of 10,000x the bet. Stakes range from 0.20 to 100, which keeps it accessible while leaving headroom for those chasing bigger multipliers. The maths model can swing, but the cluster refills, sticky redrops, and multiplier wilds give frequent shots at linking wins across a round, especially when persistent multipliers carry over into free spins.

From my sessions the slot felt fair for its risk tier. Base game spice comes from multiplier wilds appearing in the right places, while the three character features nudge boards into shape for clusters. Bonuses raise the ceiling through persistence and increases on multiplier wilds. If you prefer steadier RTP realisation, Bonus Hunt is a handy lever, but the super bonus remains the clear outlier for chasing the headline numbers.

Cluster Kingdom Slot Verdict

I rate Cluster Kingdom as a class act. ELK Studios has nailed a sweet mediaeval atmosphere and thickened it with blasts of heavy metal at just the right moments. As a cluster pays slot, it would be tempting to wish for drops before refills, yet the current system still links repeat wins well. Lower down the pecking order is not dull either, since multiplier wilds and sticky redrops add spice to the base game.

When the hierarchy climbs to bonuses, the package shines. The royal trio engineer engaging boards, multipliers carry between spins, and the top potential caps out at 10,000x the bet. It feels like a clever board game with coins, cards, and a bundle of cash on the line. Across playtests I found several ivy-lined pathways to exciting results, and when things line up, Cluster Kingdom tells a gripping tale of kings and queens.