Nitropolis 4

by ELK Studios

They’re back for another high-octane adventure and they’re ready to do whatever it takes to get more of that valuable nitro to keep their dystopian lives running at full throttle. Nitropolis 4 from ELK Studios is the latest release in this series featuring the famous Nitro Reels in addition to Big Symbols, multipliers, free spins and a max 50,000x win.

Slot information

RTP: 94.00%
Volatility: High
Max Payout: 50,000x stake
Reels: 6
Paylines: 4,096
Jackpot: No
Min Bet: 0.20
Max Bet: 50.00
Themes: Action, Animal
Release Date: 23rd Feb 2023

Our rating

“ iGaming at its best! ”

4.5 out of 5

Win potential

Play Nitropolis 4

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Nitropolis 4 Screenshots

Nitropolis 4 Features

Slots with plenty of features tend to be extremely popular so there's no reason why this game shouldn't turn out to be a real crowd-pleaser. It is brimming with action all the way through the base game and the free spins bonus as well. Watch out for a ton of modifiers that will take over the reels and hopefully produce some cracking wins.

Players outside the UK can get straight to the following features by using the X-citer feature. It all depends on where you live and might be an option if you’re lucky.

Nitro Reels

Nitro Reels are a standard helping for games in this series. They take up two positions on the board with a nitro outline and contain up to 12 regular symbols. They can also appear as Big Symbols which cover six positions. This is what helps to create so many winning ways in this slot collection.

Nitro Booster

For an additional boost, look up to the TV screens at the top of the reels where eight different modifiers can occur at random.

Nitro Multiplier

Nitro Multipliers will multiply all wins that occur and can be up to x12 in value. Watch out if two or more land at the same time as they will multiply by each other.

Free Spins

Up to 20 free spins will be yours when you land between three and six bonus symbols. As regular wins increase the row sizes, a safety level is put in place to ensure the next round of spins doesn't drop back down again. Any Nitro Reels in play will stay until the end of the feature. If you land a Super Bonus symbol then get ready for permanent eight rows of action with the both ways modifier in place.

Nitropolis 4 - Nitro Reels

Nitro Reels

Nitro Reels produce up to 12 symbols within the same 2-symbol space. Win lines can run into tens of thousands when this happens.

Nitropolis 4 - Nitro Booster

Nitro Booster

It’s time for modifiers galore as wilds, upgrades, max rows and more can all come your way at any point.

Nitropolis 4 - Nitro Multiplier

Nitro Multiplier

All wins in view with a Nitro Multiplier will grow up to 12x—or higher if more than one exists.

Nitropolis 4 - Free Spins

Free Spins

There’s a maximum of 20 free spins at stake with safety levels in place to keep those reels as stretched as possible.

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Nitropolis 4 Review

Having played the other games in this series, there was never a doubt in our minds that this game was going to produce the goods and after going through the feature selection, we're pretty sure that the rest of this production will live up to expectations.


What can you say about the Nitropolis 4 game design? It is simply stunning and somebody at ELK Studios deserves an award. It's industrial and grimy while being beautifully presented and it all happens in tandem with raw sounds and adrenaline-filled effects that keep you on your toes. You couldn't ask for much more from a game in this category on your laptop, PC or mobile device.

Game Play

The free spins game will undoubtedly bring the biggest wins thanks to the rows being held at certain levels and various modifiers that keep features stuck in place. However, the base game is just as exciting and will produce all you need and more while you wait for the freebie to turn up. Just beware that it's hard to put this game down so plan your screen time carefully!

Win Potential

Another plus for this game is the huge 50,000x max win and to see this, you'll need to watch the rows expand and the various modifiers land in place. The volatility is fairly high but not astronomical and the RTP of 94% is a little on the low side, unfortunately.

Our Verdict

Go and play Nitropolis 4! We aren't really sure what else needs to be said.

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

Play Nitropolis 4

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