King of the Streets (Slotmill) – Review & Demo Play

King of the Streets: Slot Overview

Slotmill drops me into a 1920s New York night run by Don Corlion, a cigar-chomping lion guarding his Lion's Den. King of the Streets plays on a 6x6 grid with Cluster Pays, where 5+ adjacent symbols connect horizontally or vertically. Each win triggers Avalanches as the Don smokes next to the reels. It's a high volatility setup with a gangster vibe and hard-as-nails presentation. Under the hood sit Coin Clusters, Multiplier Safes, and a bonus structure that can swing sharp when it catches fire.

King of the Streets Slot Features

Avalanches pull off all symbols that are part of a win, plus any non-winning symbols of the same type as the winning ones. A wild then spawns in one of the empty spaces before new symbols drop. This repeat cycle keeps rolling while fresh clusters land. It's a tidy twist on standard cascades, as that extra wild changes the board state after every hit and helps string together longer sequences, especially when clusters split across the grid and the wild plugs the gap.

Coin symbols carry 1x to 40x bet values. When 5 or more Coins connect, their values are added and paid, the cluster explodes, and a fresh Coin with the total multiplier lands in an empty cell. That sticky value can fold into another Coin cluster on the same round, letting me re-score the pot if more Coins link up during ensuing drops. It's a sharp money collect loop that pairs well with persistent wild spawns from the Avalanche mechanic.

Multiplier Safe symbols arrive with x2 to x500 values. When wins happen and a Safe is on the grid, it waits until no more drops occur. Then all Safe values combine, and the total multiplier applies to the round's win. In free spins this takes on a bigger role, but even in base it can flip an average tumble into something spicy. Knowing those Safes stay put until the dust settles adds a push-your-luck edge to every cascading chain.

King of the Streets Symbols and Paytable

Pay symbols run from card suits to gangster kit. Lows are diamonds, clubs, hearts, and spades. Highs are a pistol, a cigar in an ashtray, a whiskey glass, brass knuckles, and Don Corlion. With Cluster Pays, 5-of-a-kind clusters award 0.2x to 1x the bet depending on the symbol, scaling right up to 14+ clusters that pay 6x to 50x. The police badge is the wild, substituting all standard icons except scatters and special symbols.

Coins are instant-value symbols that pay via Coin Clusters. Safes are the multiplier carriers. Bonus symbols trigger free spins and super free spins. One extra quirk worth noting: when a wild substitutes for Coins, it has no Coins value of its own; it just helps connect the cluster. That matters on marginal Coin layouts where adjacency needs a bridge. Across the board, the win model rewards large clusters and repeat Avalanches more than single isolated hits.

King of the Streets Symbols and Paytable

Symbol	Quantity	Payout
	14+	x50
	13	x30
	12	x22.5
	7	x2.25
	6	x1.5
	5	x1
	14+	x20
	13	x15
	12	x12
	7	x1.5
	6	x1
	5	x0.6
	14+	x15
	13	x12.5
	12	x10
	7	x1.2
	6	x0.9
	5	x0.5
	14+	x12
	13	x10
	12	x9
	7	x1
	6	x0.7
	5	x0.4
	14+	x12
	13	x10
	12	x9
	7	x1
	6	x0.7
	5	x0.4
	14+	x9
	13	x8
	12	x7
	7	x0.9
	6	x0.5
	5	x0.3
	14+	x7.5
	13	x6.5
	12	x6
	7	x0.8
	6	x0.4
	5	x0.2
	14+	x6
	13	x5.5
	12	x5
	7	x0.8
	6	x0.4
	5	x0.2
	14+	x6
	13	x5.5
	12	x5
	7	x0.8
	6	x0.4
	5	x0.2
	Scatter
	Scatter, Special
	Wild

Free Spins and Super Free Spins in King of the Streets

Three scatters award 10 free spins. During the bonus, when a Multiplier Safe lands and the spin yields a win, that Safe's value adds to a total multiplier. The total applies to that spin's payout and persists for the remainder of the feature; it does not reset. A special +1 symbol can appear to add an extra free spin. This structure can snowball as more Safes show up early, making later spins hit harder when clusters or Coins line up.

Super free spins trigger with 2 scatters and a super scatter, awarding 10 spins. Here, remaining Coin symbols collect at the bottom between spins, staying in play to help form fresh Coin clusters across the round. The same total multiplier behaviour from Safes applies, so the dream script is early Safes plus carry-over Coins. When that pairing lands, Coin Clusters get multiplied along with regular clusters, and the last few spins can jump from tidy to explosive.

Bonus Buy Feature

Super Free Spins Bonus Guarantees a game round triggering Super Free Spins Bonus at the cost of 500x the selected bet.
Feature Cost:	x500 Bet
RTP:	96.42%
Volatility:	High
Free Spins Bonus Guarantees a game round triggering Free Spins Bonus at the cost of 100x the selected bet.
Feature Cost:	x100 Bet
RTP:	96.25%
Volatility:	High
RANDOM MULTIPLIER Guarantees a game round triggering Multiplier Safe at the cost of 40x the selected bet.
Feature Cost:	x40 Bet
RTP:	96.21%
Volatility:	High

Fast Track and Xtra-Bet in King of the Streets

Fast Track offers direct access to key features. A game round with a triggering Multiplier Safe costs 40x the bet. Regular free spins cost 100x, while super free spins cost 500x. There's also an Xtra-Bet toggle that raises the stake by 50% and makes it 2.8 times more likely to trigger free spins. I like using Xtra-Bet during longer sessions, then stepping into Fast Track if the balance and volatility are in step with my target.

RTP, Volatility and Max Win in King of the Streets

Max RTP clocks in at 96.04%, with alternative configurations set lower. Volatility is high, and the max win is 15,000x the bet. Stakes run from 0.20 up to 50 per spin, matching the Cluster Pays engine and feature buys. In practice, runs feel swingy: Coin Clusters provide base-game spikes, while Safes are the kingmakers in bonuses thanks to that non-resetting total multiplier. The package rewards patience and thrives when Avalanches chain beyond the first drop.

King of the Streets: Slot Verdict

I rate King of the Streets as a crime-styled cluster slot with real bite. The Avalanche that spawns a wild on every win keeps boards alive, Coin Clusters can retrigger themselves via the merged Coin, and Safes now reach up to x500. In free spins the total multiplier ties it together, turning decent boards into big ones without needing a perfect storm. When super free spins add carry-over Coins, the round shifts up a gear and the sums can escalate.

On the flip side, regular free spins drop the coin carry-over, so not every bonus sails. The max win sits at 15,000x, which feels fair with the new multiplier ceiling. For me, the draw is that persistent total multiplier and the way Coins and clusters both benefit from it. I keep this in rotation when I can stomach a high-volatility curve and fancy a night outside the law with the Don watching on from the Lion's Den.