Tournaments Bonuses

Nitropolis 4

Review, Demo Play, Payout, Free Spins & Bonuses

Nitropolis 4 is an online slot created by ELK Studios. The key features include free spins, multipliers, special symbols and boosters. The game's volatility is high, and the RTP is ...94%. The top prize in the game is worth only 3x your stake, but the maximum prize reaches 50,000x the bet.

mask mask

There are no bonuses currently available but check out the welcome bonuses here

Slots Temple Content Border
50 Votes
3.0 out of 5 stars
Write Review
Slots Temple Content Border
  • Chaotic theme with many twists and turns
  • An abundance of features
  • Maximum prize worth 50,000x
  • RTP is just 94%
  • Highly volatile

Nitropolis 4 Slot Review

Welcome to the freak show! Nitropolis 4 online slot continues where its predecessor Nitropolis 3 stopped and keeps the flame alive. ELK Studios is again inviting you to think about what the future will be like, with no humans around and animals taking control of literally everything. From dangerous Dobermanns to sneaky cats and resourceful rats, they have all found a spot on an oil platform ready to explode.

Do animal gangs, gritty surroundings, and the City of Nitropolis have the power to deliver something new and original in their 4th instalment? Nitropolis 4 free spins, multipliers, X-iter and other features just keep on coming, so we dare say, the odds are on its side.

Theme and Graphics

The dystopian Nitropolis is once again taking centre stage! Designers have created an animal-themed slot that follows the distinctive style and vibe of previous episodes. The resemblance is most obvious when compared to the original Nitropolis. However, we must admit that Nitropolis 4 looks far more fresher and a lot more modern.

The Rogue Rats, the Pug Thugs, the Gritty Kitties and the Dirty Dawgs are back, and there are no new characters to mess up the already-established rankings among the animal gangs. The continuity is admirable, and overall, Nitropolis 4 slot is a great-looking game, as long as you don’t mind edgy soundtracks and even edgier characters with strong personalities.

Nitropolis 4

Nitropolis 4 Slot RTP and Variance

Nitropolis 4 has an RTP of 94%. Unfortunately, it is well below what we consider to be fair and acceptable in online slots. The game offers high volatility and pays less often than average, but once it does, the prize will be notable. It is worth the effort as the maximum win is capped at 50,000x the stake.

How to Play

Here we have a quick guide on how to play ELK Studios’ Nitropolis 4 demo slot and real money game:

  • The big spin button that starts the reels
  • Use the coin icon to finetune your bet total
  • Open the main menu to access rules, paytable, and bonus features, as well as Quickplay option
  • Press the Autoplay button for auto-spins
    • Choose between 10, 25, 50, and 100 auto-spins

How to Win

Open the Nitropolis 4 slot, and you’ll see that it starts on a 6x4 matrix with 4,096 ways to win. As soon as you hit that first win, you’ll notice a fun twist to the old-fashioned grid. Wins trigger the cascading mechanic that removes all the winning symbols with a bang, so new symbols may drop.

On top of that, the gaming grid expands up to 8 rows in height. As the board expands, the number of paylines can increase up to 737,280!

The best-paying symbols in Nitropolis 4 casino game are animals, led by the Dobermann, that will pay you up to 3x the bet. Royals bring the least amount to the bankroll, only up to 0.3x your stake.

The betting limits for Nitropolis 4 are between £0.20 and £100 per spin.

Free Spins and Bonuses

Nitropolis games are famous for being stacked with features, and Nitropolis 4 is no different. Players should buckle up and get ready for a wagonload of bonus games and special elements that make every new spin different from the previous one.

Expect to find the immensely popular X-iter option, as well as free spins, multipliers, Nitro Reels, and big symbols. Here they are with a few explanations:

Free Spins

The Free Spins bonus game is triggered with the help of a submarine (Bonus symbol):

  • 3 symbols in view - 8 free spins
  • 4 symbols in view - 12 free spins
  • 5 symbols in view - 12 free spins
  • 6 symbols in view - 20 free spins

During the Nitropolis 4 bonus feature, Nitro Reels are sticky. If you trigger the feature with at least one Super Bonus symbol, you get to play the Super Bonus Game with the maximum number of rows and paylines that work both ways.

Nitro Booster

On top of the playing board, you will notice two displays reserved for Nitro Boosters. The Nitropolis 4 slot has eight Nitro Boosters in total:

  • Redrop - Bonus and Nitro symbols are sticky, while other symbols are removed and replaced.
  • Both Ways - wins are paid both ways.
  • Garbage Collect - removes random symbols, causing a cascade.
  • Max Rows - the grid expands to 8 rows high.
  • Nitro Appear - a Nitro Reel is placed on the grid and the size is set randomly.
  • Nitro Wild - active Nitro Reel is filled with Wilds.
  • Nitro Upgrade - Nitro Reels increase in value.
  • Nitro Match - Nitro Reel is matched with another symbol to create a winning combo.

Nitro Multiplier

Nitro Multipliers cover two positions but count as only one symbol. They multiply all wins in the view. The values of multipliers are:

  • x4
  • x6
  • x8
  • x10
  • x12

When more than one multiplier is present on the Nitropolis 4 playing board, their values multiply.

Nitropolis 4 Review – Our Verdict

Elk Studios hit a goldmine with the Nitropolis series and, surprisingly, was able to keep it fresh for so long. Having four somewhat similar titles would, in many cases, be repetitive, but not when it comes to Nitropolis 4 and its predecessors.

It’s the Same Vibe with Many Features

Nitropolis 4 is not exactly a game full of surprises. The characters and the setting will feel familiar, and even a few features will evoke memories of your past sessions on Nitropolis 3 and Nitropolis 2. Still, the creative forces at ELK achieved creating a game that doesn’t feel or look stale but is very much on the contrary.

The best asset of the Nitropolis 4 game is its features. Like an avalanche, they keep coming and coming, wonderfully interacting with each other. However, the stacked gameplay options come at a high price, and that is the low RTP.


The RTP of 94% will, for plenty of players, feel like an abomination, and rightfully so. In a world where everything under 96% is considered unfair, it is surprising to see a supplier deciding to go with it and not increase the numbers. It is a significant drop from 95%, the RTP attached to the previous two games, and an even bigger plunge from the original that boasted an RTP of 96.1%. In this one aspect, Nitropolis 4 took a turn for the worse.

Nitropolis 4 - Is It Worth a Spin?

Players who can tolerate the low RTP and high volatility will be satisfied with all the tricks Nitropolis 4 is hiding up its sleeves. After all, the massive maximum payout of 50,000x the stake should not be neglected without a second thought. It is promising, but the road to it could be long and covered with more empty spins than a casual gamer can tolerate.

Disclaimer: Nitropolis 4 trademark / license is owned by ELK Studios. This site is not endorsed by ELK Studios.

Slot Data
Slot Name: Nitropolis 4
Software: ELK Studios
RTP: 94%
Paylines: 4096
Reels: 6
Min Bet (all lines covered): £0.20 (GBP)
Max Bet: £100 (GBP)
Top Win: 50000
Features: Wild Symbol, Multiplier, Free Spins, 6 Reels, Cascading, Colossal Symbols
UK Available in UK? Yes. ELK Studios have a UKGC license and are allowed to offer their games at UK licensed casinos.

Nitropolis 4 Slot Review FAQs

What is the RTP of ELK Studios’ Nitropolis 4 slot?

The RTP of ELK Studios’ Nitropolis 4 slot is not impressive and only hits the 94% mark. The acceptable lower limit for most players in online casinos is 96%.

What is the biggest win available on Nitropolis 4?

The biggest win available in Nitropolis 4 is 50,000x the bet. This prize may still attract many, despite the games’ low RTP.

How volatile is Nitropolis 4?

Nitropolis 4 is a very volatile game. Be ready to play many empty spins before hitting it big time.

Games by Same Maker

Slot Name RTP Volatility Top Win Themes
Black River Gold 96.10% High volatility 5000
CHI 96 High volatility 12500
Crusader 96.1% High volatility 2500
Cygnus 96.1% High volatility 5000
Dreamzone 96% Medium volatility 2500
Ecuador Gold 96.1% High volatility 25000
Electric Sam 96% Medium volatility 2000
Hit It Big 96% High volatility 1000
Hong Kong Tower 96.3% Medium volatility 3016
Ice Wolf 96.1% Medium volatility 2500
Io 96% High volatility 5000
Lakes Five 96.3% Medium volatility 1000
Micro Knights 96% Medium volatility 2500
Respin Circus 96.3% High volatility 2500
Sam on the Beach 96.3% High volatility 2275
Taco Brothers 96.2% Medium volatility 1500
Tahiti Gold 96.1% Medium volatility 1000
The Wiz 96.01% Low volatility 10
Valkyrie 96.3% High volatility 3000
Voodoo Gold 96.1% High volatility 5000
Win Win 96.1% Medium volatility 500
    Slots Temple Content Border
    User Reviews
    Write Review
    Overall score: 3.0 out of 5 stars
    Slots Temple Content Border

    There are no reviews for this game

    Be the first to write a review