Yes. The $1 can reward you with up to 50 free spins. With 1 symbol randomly paying scatter style, Nitro Reels are sticky meaning it’s easier to play with up to 85,155,840 ways to win on each free spin.
Nitropolis Slot Review
4 / 5
Author: Chris Taylor
5 min read 
4 / 5
Author: Chris Taylor
5 min read
Get 100 Free Spins when You Bet £20
Head to a post-apocalyptic world where a quartet of animal gangs are in turf war in the explosive Nitropolis slot. Created by Elk Studios, this 6 reel slot is played using Nitro Reels where the number of symbols in a pair of positions can get as high as 12. The minimum number of ways to win active on each spin is 4,096 but it can reach an enormous 85,155,840 ways to win. Other highlights include respins that follow every winning spin and a bonus round that awards up to 50 free spins, complete with sticky Nitro Reels. Find out more about this volatile slot in our Nitropolis review.
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Nitropolis Demo
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Nitropolis Slot RTP, Details & Wager Limits
The Nitropolis slot is played on a 6 reel machine where you’ll have a minimum of 4,096 ways to win on each spin. This can get much higher as we’ll explain in the bonus features section below. To create a winner, land 3 or more matching symbols or wilds on adjoining reels, starting from reel 1.
Click on the coins in the bottom left-hand corner of the screen to adjust your stake. You can play from 20p to £100 per spin. You can set up to 100 autospins too in certain territories. There’s a quickspin mode which you can set via the settings tab.
The Nitropolis RTP is 96.1% which is about average. The hit frequency rate is 19.8% so you can expect to land a winner on about a fifth of spins on average. The action here is fairly fiery. The Nitropolis volatility is in the high range. Out of 10, we’d put the variance at about an 8.
The max win is 10,000 x your total stake per spin.
Theme – a world run by 4 animal gangs
Oddly, you head to a post-apocalyptic world run for 4 animal clans: the Dirty Dawgs, the Gritty Kitties, the Pug Thugs and the Rouge Rats. There’s a comic book aesthetic to the design in the Nitropolis slot. The visuals here are bright and colourful and the cartoon style matches the theme nicely. It feels like you’re on the set of the Judge Dredd film in some ways.
Let’s be generous and say that the soundtrack is an acquired taste. It had us reaching for the mute button though. Thankfully, you can get rid of the music but keep the game sounds which is fine. Do this via the settings tab.
Set against a rather grimy, industrial backdrop, the reels are made up of graffiti-style A to J symbols which appear alongside the logos of the 4 gangs. The most rewarding symbols are the leaders of the 4 animal gangs. The head of the Dirty Dawgs clan is the highest paying symbol. He resembles the Terminator. He awards 1.5, 2, 2.5 or 5 x your stake if you land 3, 4, 5 or 6 on adjoining reels. The explosion is the game’s wild.
| Symbol | Payout |
|---|---|
 J | 2, 3, 4 or 5 = 0.1, 0.2, 0.3 or 0.5 x stake |
 Q | 2, 3, 4 or 5 = 0.1, 0.2, 0.3 or 0.5 x stake |
 K | 2, 3, 4 or 5 = 0.1, 0.2, 0.3 or 0.5 x stake |
 A | 2, 3, 4 or 5 = 0.1, 0.2, 0.3 or 0.5 x stake |
 Rogue Rats Logo | 2, 3, 4 or 5 = 0.3, 0.4, 0.6 or 1.2 x stake |
 Pug Thugs Logo | 2, 3, 4 or 5 = 0.3, 0.4, 0.6 or 1.2 x stake |
 Gritty Kitty Logo | 2, 3, 4 or 5 = 0.5, 0.6, 0.8 or 1.6 x stake |
 Dirty Dawgs Logo | 2, 3, 4 or 5 = 0.5, 0.6, 0.8 or 1.6 x stake |
 Rat Boss | 2, 3, 4 or 5 = 0.8, 1, 1.5 or 3 x stake |
 Pug Boss | 2, 3, 4 or 5 = 1, 1.2, 1.7 or 3.4 x stake |
 Kitty Boss | 2, 3, 4 or 5 = 1.2, 1.4, 1.8 or 3.6 x stake |
 Dawg Boss | 2, 3, 4 or 5 = 1.5, 2, 2.5 or 5 x stake |
 Wild | Substitutes for all except Bonus symbol |
 Bonus | 3+ triggers Free Spins feature |
Nitropolis Mobile
You can enter this industrial wasteland on all devices including computers, tablets and mobiles. The bold, comic book-style design works perfectly well on a smartphone, even with all the potential moving pieces here. The Nitropolis mobile slot is nicely crafted.
Nitropolis Bonus Features
In the Nitropolis slot, the gameplay is rather unusual. That’s down to the Nitro Reels where a pair of vertical positions can be made up of up to 12 symbols that can hugely increase the number of ways to win. There are also respins following a successful spin as well as a free spins feature. We’ll start by looking at the Nitro Reels.
Nitro Reels feature
The main element that makes Nitropolis stand out is the Nitro Reels feature. The base game engine is 6 reels, 4,096 ways to win. On any spin, the Nitro Reels can appear. These are 2 vertical positions. Instead of the standard 2 symbols you’d expect to see here, you’ll see between 4 and 12.
The increased number of symbols also has an impact on the number of ways to win. You can check this in the meter above the reels. Fully expanded, you’ll have 85,155,840 ways to win or create a winning opportunity.
Nitro Reels can also be upgraded to represent other examples of the same symbol elsewhere on the reels. You could also benefit from the Second Chance Respin feature following a winless spin.
Respins feature
The likeliest route to a respin comes following a successful spin. The symbols that made up the winning combination spin again with the rest of the reels locked in position. The respins keep on coming as long as a new winning combination is created.
Bonus Game feature
The engine is the bonus scatter symbol. Land 3 or more on the same spin to activate the Bonus Game feature. The more scatters, the more free spins you’ll start with:
| 3 scatters | 10 free spins |
| 4 scatters | 15 free spins |
| 5 scatters | 20 free spins |
| 6 scatters | 25 free spins |
There are some extra goodies on offer when you trigger the free spins too. Before the feature begins, 1 symbol is randomly selected that will pay scatter style for the whole of the round.
Each time a Nitro Reel lands during the free spins, it locks in position and will be active for any remaining free spins. With Nitro Reels being sticky as such, you can play with more ways to win on each free spin.
Finally, retriggers are possible too. Land 3 or more bonus symbols and you’ll get another round of free spins. This can lead to 50 free spins in total.
Nitropolis Review Summary – innovative gameplay + high energy
This Nitropolis slot is like an animal mash-up of Mad Max and The Warriors. The design works well and the soundtrack is unique. You will either love or hate if truth be told.
However, it’s the gameplay and especially the Nitro Reels that makes Nitropolis stand out. You can play with over 85 million ways to win on each spin, which can lead to big wins. The respins that follow each winning spin can deliver some very decent action.
It’s the Bonus Game feature, where the Nitro Reels turn sticky, that things can really start to motor. It has some similarities to the Punk Rocker slot by Nolimit City that uses the xWays mechanic to give you more ways to win. The music gave us a bit of a headache but aside, there’s plenty to like in this visit to Nitropolis.
ELK has gone a step further with the NItropolis 2 slot sequel – check it out. You can spin away here with close to 200 million ways to win and there are 12 bonus features to get your teeth stuck into.
Pros
Cons
Nitropolis FAQs
The Nitropolis return to player rate is 96.1% which is in the mid-division. On average, you can expect to land a winning spin around one-fifth of the time with a 19.8% hit frequency.
The maximum win here is 10,000 x your total stake per spin. Medium to high variance, your chances of winning big come from the Nitro Reels which can give you over 85 million ways to win.
The $1 sees Nitro Reels randomly appear which are 2 vertical symbol positions. Instead of showing 1 symbol each, the Nitro Reels can show between 4 and 12 symbols. This can impact the number of ways to win which will be a minimum of 4,096 on each spin but can reach 85,155,840 ways to win.
Yes, created by ELK Studios with HTML5 technology, the Nitropolis slot $1 at Online-Slot.co.uk. Play it on all iOS and Android devices as well as desktop.
Chris Taylor
1540 Articles
Chris is a slots expert that has reviewed and played over 10,000 slots online. Having being in the iGaming industry since 2004, he loves digging into the mechanics behind the slot games, playing the various bonus features and giving an honest verdict from a player’s perspective.
