Nitropolis 4 Slot Review (Elk Studios)

RTP: 94

Provider: ELK Studios

Best casinos: All British Casino, Videoslots, Kwiff Casino, Fun Casino, Casushi

Nitropolis 4 Key Features

RTP: 94

Provider: ELK Studios

Volatility: Medium/High

Theme: Post-Apocalypse

Reel style: 6x4

Paylines: 4096

Stakes: £0.20 - £50

Max Win: 50000



Big Symbols

Bonus Game


Explore Nitropolis 4 slot at top slot sites, featuring an engaging post-apocalyptic theme with hybrid animals. This slot game is a standout from ELK Studios, offering over 4,096 winning ways and a plethora of features like big symbols and an avalanche mechanic. Immerse in its medium-to-high volatility at recommended slots sites and dive into more thrilling slot games at OLBG.

Casinos that offer Nitropolis 4 slot sorted by RTP

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Game Data

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A dystopian society managed by animals? Why not. Anything is possible in online slots, and the Nitropolis 4 slot game is here to confirm that. This release by ELK Studios is packed with memorable visuals and good music.

It’s good that every user can alter how they play this game. For instance, you can use a regular play button or autoplay mode. There are also various betting options to choose from. Of course, this slot includes many unique features, including a bonus game.

Keep reading our in-depth Nitropolis 4 slot review to discover the features of this release and see where it suits your gaming style.

 Slot Review Key Features
StudioElk Studios
ThemePost Apocolypse
RTP %94
Reel Style6x4 in the base game
Stake Range£0.20 - £50
Max Win50,000x
Special SymbolsNitro Booster Symbols, Nitro Multiplier Symbols, Wild Symbol, Big Symbols, Bonus Symbol, Super Bonus Symbol
FeaturesNitro Booster, Avalanche, Big Symbols, Bonus Game/Free Spins, Nitro Reels/Nitro Multiplier

Graphics, Music, and Sound Effects

We can say freely that the lads from ELK Studios did an excellent job with the graphics found at the Nitropolis 4 slot. This makes sense because they just fine-tuned the successful visual elements of the game’s predecessors.

For example, you will notice reels made of metal and unique symbols in various colors. Additionally, we have the dock and the control room behind the grid.

The specific atmosphere is supported by futuristic/sci-fi-sounding music. Finally, we have super-thrilling sound effects on every spin, whether winning or non-winning.

Nitropolis 4 Expert Review

Theme & Symbols
Bonus Features
Max Win (50000)
Sounds & Music
RTP (94)

Key Features

With Nitropolis 4 online slot, you will get a 5-star audiovisual experience. But can we say the same for the gameplay? Answering this question is possible only after analyzing the key game features.

Thanks to this detailed Nitropolis 4 slot review, you will better understand the slot’s story, grid and winning ways, special features, and a few other things. Like all our slot game reviews, no stone will be left unturned when analyzing Nitropolis 4.

Theme – Post-apocalyptic

Dystopian and post-apocalyptic themes are pretty popular in modern movies and books. Thanks to some software developers, including ELK Studios, stories like this are added to many slots. So, the Nitropolis 4 slot is a post-apocalyptic-themed game.

It seems that something has happened to humanity, and animals have taken over the control of our planet. They have developed human characteristics (or maybe they were mixed with humans, who knows?) and started running things, including working at docks.  

One of the ways to figure out what the theme is all about is to check the standard symbols. In addition to the four classic playing cards, this slot has eight other standard icons: team emblems (Rogue Rats, Pug Thugs, Gritty Kitty, and Dirty Dawgs) and four animals that lead these teams (a Rat, a Pug, a Cat, and a Dog).

The special icons, like the Naval Mine Wild icon or the Nitro Canister Multiplier icon, also support the theme.


Even though the gameboard at the Nitropolis 4 online slot is not fixed, the number of reels is always the same – 6. As for the rows, the grid can display 4 to 8 rows per reel.


This is another example of an online slot that doesn’t use conventional paylines. The Nitropolis 4 slot offers at least 4,096 ways to win, and the game states that this number can reach millions in some situations.

In any case, hitting winning patterns is always the same – you need three to six standard symbols of the same kind on adjacent reels starting from reel 1.


We’ll continue our analysis of the key game features with the theoretical Return to Player percentage, or simply RTP. Learning this percentage will help you understand what you can expect regarding payout rates in the long run. This is a theoretical prediction.

The Nitropolis 4 RTP is 94%. So, it’s on the lower end of the average range. Still, this doesn’t mean you can’t play the same game with a higher payout rate. Namely, many online casinos alter these rates according to their specific needs. We have a table below to prove that.

It’s important not to focus only on the sheer numbers. You should also check the reviews for these casinos. Our reviews include essential information about the casino welcome bonuses and deals, banking options, game variety, customer support, and other things that will help you decide where to play Nitropolis 4.

All British Casino94Read Now
VideoSlots94Read Now
Kwiff94Read Now
Fun Casino94Read Now
Casushi94Read Now

Of course, there are other slot sites we recommend, not just the ones on the table above. These are carefully hand-picked casino sites with excellent offers for UK players.

Stake Range

This time, we have twelve wagering options. The Nitropolis 4 slot lets you wager as little as £0.2 per spin and as much as £50 per round.

Max Win

Another great thing about this title is the maximum win cap. This is a rare example when this value is set at 50,000x the total bet.

Big Symbols

At random, Super or Mega symbols covering 2x2 or 3x3 positions can appear on the matrix. They are known as Big symbols. Remember that both standard and Wild symbols can occur in this form.

While discussing the Wilds, we should note that they appear like Naval Mines and replace standard symbols to finish winning combinations.

Avalanche Feature

When players hit a winning combo, they will receive a prize. Before they get a chance to spin the reels again, they’ll witness the removal of the contributing icons. This will make new symbols drop from above and open an additional row. As we said, you can get up to 8 rows per reel.

Nitro Booster

There are two monitors above the grid at the start of each round. These monitors are typically blank, but at random, they can reveal so-called Nitro Booster modifiers. A total of 8 special modifiers can appear in these areas.

The modifiers offer various extras: Redrop (a partial respin), layout expansion, both-ways payouts, an extra Nitro Reel, a Nitro Match for a winning combo, a Nitro Reel’s value improvement, or a Wild Nitro Reel.

Nitro Reels/Nitro Multiplier

Nitro Reels occupying two grid cells can appear randomly on any spin. We’re talking about special reels boasting four to twelve regular symbols. Additionally, there are Big Nitro Reels with 6 cells featuring two to six 2x2 standard icons.

Besides that, you can hit Nitro Multipliers. Like the Nitro Reels, they cover two cells and are a single symbol. Of course, they are here to help you boost your wins by multiplying these wins. You should expect values of x4 to x12, which will be multiplied together if there’s more than one on the gameboard.

Bonus Game/Free Spins

The good news is that you’ll find a bonus game too. It’s basically a round of free spins launched whenever you get three to six Bonus icons (Hand-cranked Submarines) on any position on the matrix.

Every player can trigger 8 to 20 free spins, during which the Nitro Reels stay in their place (Sticky) until the round is over. With every winning turn, the safety level is increased by one row.

In addition, there’s a Super Bonus icon, and landing at least three Bonus and Super Bonus icons will activate the Super Bonus Game. The difference is that the higher number of rows is launched at the start, and you can hit winning combinations in both ways.


If there’s one thing that this game is missing, that’s a direct jackpot reward. Still, you should not forget that the max win limit is 50,000x the total stake.

Also, we have a best jackpot slot games page if you really need to play a game like that.

Play Experience & First Impressions

Flashy – that’s the word that kept crossing my mind when I played the Nitropolis 4 slot. The 100-spin test I took was fun, but the reels that kept changing with (almost) every spin, the intense music, and the special sound effects were overwhelming at times.

Still, I guess that’s expected from a game based on nitro fuel. The wins didn’t frequently occur even though the modifiers were activated on every third or fourth spin. Thanks to the modifiers, some wins were pretty memorable, especially when the multipliers were involved.

I didn’t start a round of free spins, so I can’t really talk about this experience. Of course, I can’t be satisfied with the final result – an RTP of 70.4% - but the gameplay was exciting. I can give ELK Studios that.

100 Spins Test

100 spins is not a Real Test

We give every slot a 100 spin test to see just what it can do, or not as the case can often be - 100 spins is no reflection of the likelihood of any other 100-spin session, as RTP's are set over many millions and probably billions of spins. So this 100 spin test is just for entertainment and insight purposes

Session RTP70.4%
Win FrequencyLow/Medium
Biggest Base Game Win18.9x
Spins to Bonusn/a
Bonus Paidn/a
Time Taken for 100 Spins15:44

Expert Verdict

The Nitropolis 4 Slot by ELK Studios is part of their most famous post-apocalyptic-themed slot series. This release, as expected, has excellent graphics and music and promises many memorable moments.

The theoretical RTP of 94% is not impressive. Still, it works; the same goes for the medium-to-high volatility level.

Also, we have multiple bonuses and modifiers that make the gameplay more thrilling. This is especially true for the Avalanche feature and nitro booster.

This 6-reel release, with 4,096 ways to win in the base game, is another title I recommend because it includes the elements that make great slots.

Editorial Team Information

This Nitropolis 4 slot review was written by the OLBG Slots Content Team, beginning with Andrej Trajkovski, who has worked in the online gambling industry since 2013, playing and reviewing online slots and casinos daily for the past four years. The review is Fact Checked by William Westerlund, an online casino expert reviewing casinos and slots for over five years, and published by Steve Madgwick, our Editor-In-Chief with over 18 years of experience creating and managing high-quality sports betting and Casino content for OLBG & multiple other publications.


Nitropolis 4 Slot FAQs

  • Where can I play the Nitropolis 4 online slot for real money?

    Players can choose from dozens of online casinos in the UK to play the Nitropolis 4 online slot game. Our advice is to stick to the recommended casinos on our website.

  • What is the Nitropolis 4 slot RTP?

     You can play a game with an average RTP. More precisely, the Nitropolis 4 RTP is 94%

  • Is there a Nitropolis 4 mobile slot?

    Every mobile user (smartphone or tablet) can play the Nitropolis 4 slot as long as they have a relatively new device/operating system.

  • How do you play and win at the Nitropolis 4 slot?

    The most frequent way of hitting winning combos at the Nitropolis 4 slot is by landing three to six standard symbols of the same type on adjacent reels beginning with reel 1.

  • What is the Nitropolis 4 max win?

    You can win up to 50,000x the total bet at the Nitropolis 4 slot game, and this is one of the highest limits we’ve seen in slot games.

  • When was the Nitropolis 4 slot released?

    ELK Studios launched the Nitropolis 4 slot on 23 February 2023. This was the global launch of this game.

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