Nitropolis 2

Nitropolis 2 Slot Review

Slot Provider: ELK Studios

RTP: 95% | Variance: High | Maximum Win: 10,000x

Our Score: 8.8

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About Nitropolis 2

Reviewed by:

Published Date: 12th April 2021

How We Review Slot Games

We test and rate all slot games across 5 criteria, assigning a score out of 10 for each and an overall score that is an average of the 5. To build an accurate assessment of each game we gather information from the supplier and play in real play or demo mode. Find out more.

NOTE: Screenshots on this page were taken from playing Nitropolis 2 for real money at Casumo Casino.

Nitropolis 2 is the second in the three-part series of Nitropolis games from ELK Studios. It was released in April 2021 and is amongst this studio’s best and most entertaining slots. The Nitropolis series has a sci-fi theme and a futuristic setting but it’s also a cartoon slot – the city of the future is inhabited by roving gangs of dogs and cats scrapping for survival.

The game takes place on a 6 reel by 4 row grid with a standard 4,006 paylines potentially expanding as high as 191,102,976 when the Nitro Reels feature is activated.  Chaotic, unruly and wild at times, Nitropolis 2 can be an assault on the senses as well as a tough game to get your head around. But above all it’s great fun … as all slots should be.

Spins start at 20p per play and you can play Nitropolis 2 at the UK’s best slot sites.

Design and Artwork

Let’s roll out the cliches now … dystopian, futuristic, cinematic … Nitropolis is one of Elk’s most recognisable games and it quickly invites comparisons with films like Bladerunner or the Matrix. Though of course, it’s just not that serious, so please … we’re talking cats and dogs here! What you have is a grimy urban setting with tower blocks, electronic advertising and neon lights everywhere. Oh, and it’s perma-nightime too of course. Meanwhile, nitro is the fuel that the thug-animals on the reels are hunting down to survive and you can see pipes above the reels pumping the stuff into the game to boost your wins presumably.

The punk-ish style is not dissimilar to Nolimit City slots like San Quentin xWays too, complete with a pumping vaguely nu-metal dance soundtrack.

But however you want to describe it, Nitropolis 2 is an unforgettable audio-visual experience.

Nitropolis 2 Game Information

  • RTP: 95%
  • Variance: High
  • Maximum Win: 10,000x
  • Progressive Jackpot: No
  • Reels: 6
  • Rows: Up to 12
  • Paylines: Up To 191,102,976
  • Minimum Stake: £0.20
  • Theme: Sci Fi
  • Features: Wilds, Free Spins, Nitro Reels, Multipliers, Pays Both Ways, Re-Spins

What We Liked

  • Awesome expanding reels potential
  • Crazy futuristic theme
  • Big win potential
  • Superb soundtrack
  • Lots of base game modifiers

What We Didn't like

  • Variance too high for some

Nitropolis 2 Review Scores

  • Theme and Design 9
  • RTP and Variance 7
  • Maximum Win 9
  • Symbols and Paytable 9
  • Features and Gameplay 10

What Our Reviewer Says ...

"An action-packed sequel to a memorable slot, stacked to the rafters with features to set the blood racing!"

Overall Score: 8.8

RTP and Variance

Our Score 7

What is RTP?

RTP (Return to Player) refers to the amount a game will pay out in cash prizes expressed as a percentage of all the money wagered on that game. For example, a 96% RTP means a game will pay out £96 for every £100 wagered. This is an average number and will vary from one session to the next.  Read more here.

What is Variance?

Variance refers to how far a game will deviate from its RTP over time. High variance games deviate a lot and produce uneven win distributions and unexpected windfalls. Low variance games provide a more stable and even distribution of wins. Read more here.

The RTP of Nitropolis 2 is set to 95%. That is under the average for an online slot. The Variance is high, so expect a tough ride from this one but the potential for a rampaging set of features to kick off and deliver big wins on some rare occasions.

Nitropolis 2 RTP
Nitropolis 2 RTP Displayed at Casumo

Top Payout

The top payout for Nitropolis 2 is 10,000x. That’s not bad, but if you are looking for the kind of mega-potential you see in similar style games from Nolimit City, then you will be disappointed.

Symbols and Paytable

Our Score 9

First thing to note here is that you will only need to land identical symbols on adjacent reels starting from the left to score wins. This is regardless of the position on the reel. That creates 4,096 paylines (4x4x4x4x4x4).

However, that is just the start. With Nitro Reels the number of paylines can massively increase.

That is likely the reason why the symbol values are so low. For low payers, Jack through to Ace, they are valued at a maximum of 0.4x for six on a line. Mid-range symbols are the wanted posters valued at from 0.2x for three on a line up to 0.5x for six on a line. Premiums are the 4 animals, valued at from 0.7x up to 3x for six on a line.

There are also Wilds that sub in for all other symbols to complete win lines.

Features and Gameplay

Our Score 10

The popularity of the original Nitropolis was driven partly by the quality of the narrative, sounds and graphics, but also by its feature-packed gameplay. They don’t hold back in this sequel either. Once again we are presented with a good range of wilds, boosters, expanding reels and free spins. And in the tradition of great high-risk slots, when they all come together, things go off big time!

Here is how it all works:

Nitro Reels

This is ELK’s version of Megaways™ – an expanding reels format in which the number of rows on a reel increases from the base game 4 to as many as 12. How does this happen? Nitro Reels are special reels that sit over 2 rows on any reel. Within a Nitro Reel you may have up to 12 symbols. This can create up to 191,102,976 paylines on a single spin.

This, of course, is a significant boost to the paytable.


Any symbols or Nitro Reels that form part of a winline are held for a re-spin. This can lead to    more wins. If so, the winning symbols and Nitro Reels are held again for another re-spin.

Nitro Booster

This is a new feature to Nitropolis and it’s a big one- it causes random modifiers to trigger on any spin in the base game and free spins round. When active, modifiers are displayed above each reel. There are 7 available.

  • Nitro Wild – This turns a reel into a Nitro Reel with EXTRA wilds
  • All Wild – Now, all sticky and new Nitro Reels contain ONLY wilds
  • All Premium – In this upgrade, Nitro reels contain ONLY high value icons
  • Nitro Upgrade – In this one, Nitro Reels get extra symbols added
  • All Match / Nitro Match – Like a reel clone, Nitro Reels match up with ones to the left of them
  • Re-Spins – Any visible special symbols are locked in place and re-spins occur
  • Pays Both Ways – Now paylines are active in both directions – left to right and right to left, to enhance your win opportunities

Free Spins Feature

Obtaining 3, 4, 5 or 6 Scatters anywhere opens the Free Spins Round and grants 10, 15, 20 and 25 free spins respectively. At the same time any Nitro Reel that is in play becomes Sticky which increases your chances for wins.

It is also possible to re-trigger the free spins round by landing more scatters.

The Final Verdict

Let’s be clear, when you load up Nitropolis 2 tor the first time it can feel like a very confusing game. There is seemingly a lot going on – Boosters at the top of the reels, Nitro Reels randomly showing up and a lot of noise from the soundtrack. So, it’s one you may want to try in demo mode a few times before taking the plunge with real money spins.

However, once you get familiar with the assortment of different features and you know which ones to look out for, it becomes a more exciting gaming experience. At the same time it can be very frustrating too – for a game with so many events on every spin it feels like it lets you down on too many occasions. In testing we never unlocked free spins and rarely got beyond a low value win of less than 2x. That is partly down to the low values on the paytable.

Having said that, with all its interlocking feautres this is a slot that has been designed to deliver some very dramatic wins when the time is right, we just didn’t experience them ourselves. If you are a fan of of frenetic, energetic slots gameplay then you will love Nitropolis 2.

Who Made Nitropolis 2?

  • Name: ELK Studios
  • Established: 2013
  • UK License: 40844
  • Total Games: 60 +
  • Known For: Amazing artwork, wide choice of themes and styles
  • Popular Slots: Avalon Gold, Dropz, Nitropolis, Wild Toro
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