Rat King

by Push Gaming

It's grainy and retro with a fun old-school game feel that could produce a max 10,000x payout. If this has caught your attention, then come and see how Rat King offers a collection of multipliers and free spins along with an exciting cascading reels system and scatter pays.

Slot information

RTP: 96.34%
Volatility: High
Max Payout: 10,000x stake
Jackpot: No
Min Bet: 0.10
Max Bet: 100.00
Category: Grid slots
Theme: Retro
Release Date: 27th Jul 2023

Our rating

4.0 out of 5

Win potential

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Rat King Screenshots

Rat King Features

It's all about the multipliers and free spins in Rat King. Both Multiplier and Rat King symbols are collected in the Collection Boxes as these two symbols reach the bottom of the reels.

Multiplier symbols make the progressive meter grow and this figure is applied to all wins at the end of the sequence. The multiplier then resets as a new spin begins.

Rat King symbols are also collected in these boxes at the bottom and they make their way to the meter on the left. A collection of 3, 5 or 5 of these will bring you 10, 15 or 20 free spins.

The bonus game continues the theme from the base game and you are looking out for Multiplier symbols and Rat King symbols once more. The Rat King symbols can add additional free spins while the Multiplier symbols have their usual effect of progressing the multiplier meter. 

This won't reset between spins during the bonus game, so this should show you where the biggest wins will happen in Rat King. The max 10,000x payout will certainly require more than one visit to the bonus game.

As an added extra, there are Dud symbols on the grid and a collection of 7+ of these will create a new cascade as they are removed.

Bonus Buy

If you don't have the time to wait for scatter symbols to arrive in a natural way, then the Bonus Buy option may be the solution. Some players, outside the UK, can purchase a ticket to the feature with 3 different variations available. 

To enter with 3 scatter symbols and an RTP of 96.58%, will cost 100x. 4 scatter symbols produces an RTP of 96.63% but will set you back 250x. Finally, a whopping 500x will take you into the bonus round with a maximum of 5 scatter symbols and an impressive 96.93% RTP.

Rat King - Collection Boxes

Collection Boxes

Collect Multiplier symbols to increase your multiplier level and Rat King symbols to boost the potential number of free spins.

Rat King - Free Spins Feature

Free Spins Feature

3, 4 or 5 scatter symbols award 10, 15 or 20 free spins respectively. During the bonus, the multiplier level doesn’t reset between winning sequences, which should help bring bigger payouts.

Rat King - Dud Symbols

Dud Symbols

A collection of 7 Duds will make them disappear and make way for a new cascade. Fingers crossed for a top win here.

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Rat King Review

We can't remember Push Gaming producing a scatter pays slot before so this is fairly uncharted territory for them. But they certainly are no strangers to the world of cascading win sequences so the addition of scatter-paying symbols shouldn't be too much of a step up for a developer of this quality.

As with many game producers, Push Gaming has gone for a retro feel that appeals to many of us these days and it adds a light-hearted edge to what could be some very serious slot-spinning action.


This industrial-themed game is filled with machines spitting out different coloured gloop and conveyor belts that are ready to take your collection boxes off to the bank. The symbols are made up of sticky treats and we imagine that this is what has attracted the rats to the building!

The animations are deliberately low grade and the soundtrack wouldn't be out of place in an old Mega Drive production. Mobile gamers can also get in on the action on both Apple and Android products if this is how you like to access your iGaming entertainment.

Game Play

There are many elements to this slot that we simply loved; however, a slight downside for us was how the collection boxes restricted access to multipliers and scatter symbols.

In most games, you only need bonus scatter symbols to land on the screen to trigger the main feature, but here it isn't quite so easy. All of these symbols need to make the arduous journey to the bottom of the reels and drop into a collection box to bring about a bonus game trigger. It's an extra step that might get in the way of your enjoyment and certainly your ability to back the bigger wins.

Once you get to the bonus game, it's clear that very decent wins could appear at this point thanks to the progressive multiplier that doesn't reset between winning spins.

Win Potential

As we have seen, the bonus buy option could produce an RTP level that sits just under 97% but for the most part, we will have to be satisfied with 96.30% as a general marker. The maximum payout here is 10,000x and the medium volatility isn't unreasonable.

Our Verdict

Despite our little moan about the additional step to collect Scatter symbols, we found a lot of enjoyment during our time with Rat King. Push Gaming very rarely misses the mark and they have succeeded once again in producing an engaging and fun setup. Retro fans should consider this title, big win fans should consider this title and anyone that likes coloured gloop and rats should definitely consider this title.

Paul Clare
Reviewed by Paul Clare Last updated on

Paul spent plenty of time in arcades up and down the UK discovering all of the best fruit machines and watching them grow into the incredible online slots we see today. He still loves the basic format but also has a soft spot for games with big bonus rounds that progress as you play. Immortal Romance is one of his favourite slots of all time.

Learn more about Paul here

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