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25 June 2024 
Nitropolis 5 Demo
Nitropolis 5 Slot Review 2024
Prepare for the final battle against Sgt Nitro Wolf in ELK Studios‘ last instalment of the series, Nitropolis 5!
As the sun sets over Nitropolis, the clan has come together to set their plans in motion. A final clash of grit and determination to take down Sgt Nitro Wolf once and for all, reclaiming what was taken from them. Through either victory or death, it’s time to take back Nitropolis!
Base Game & Features
Nitropolis 5 is a 6-reel, 4-row Video Slot featuring Spinning Reels and Dropping symbols, playable from £.€0.20 per spin, up to a max bet size of £.€50 per spin. Each reel can expand upwards to a maximum height of 8.
Winning combinations are removed from the reels, causing new symbols to cascade down from above via an Avalanche feature. In addition, each new symbol drop will add a new row of symbols, increasing the number of ways to win. The number of Nitro Reels and the quantity of symbols also increase.
Winning combinations are generated when a minimum of 3 matching symbols land from left to right, starting from the leftmost reel, across 4,096 ways to win. Activating Both Ways will cause wins to begin from the rightmost and leftmost reels.
Nitropolis 5 has a theoretical RTP of 94%, a High Volatility rating, and a max win cap of 50,000 times your bet. The low RTP module is consistent in ELK Studios’ titles, and may not be for everyone.
Nitro Reels
Nitro Reels cover 2 symbol positions and contain 4-12 identical 1×1 symbols, while Big Nitro Reels always cover 6 symbol positions and up to 6 identical 2×2 symbols.
Nitro Reels can also contain a Super Bonus Scatter but only counts as 1 instance. The number of ways to win will reset when the Super Bonus Scatter leaves the reel set.
Wilds & Big Symbols
Wild symbols substitute for all other symbols except regular and super scatters. Wilds, High-paying, and Low-paying symbols can appear in sizes 1×1, 2×2, and 3×3. Empty positions below Big symbols and/or Big Nitro Reels will fill with regular 1×1 symbols of the same instance.
Nitro Multiplier
Nitro Multipliers are special blockers that appear within a Nitro Reel, holding a value between x4 and x12. This multiplies all wins in view and is multiplicative if several are present. Nitro Multipliers act as a 1×1 symbol regardless of their size indicator on the Nitro Reel.
The number of ways to win resets to the previous number once the Nitro Multiplier is removed from play. Nitro Reels and Multipliers that are part of a winning combination are held and respun during a symbol refill.
NPD Holding Cell Feature
The NPD Holding Cell feature triggers randomly during any base game spin, respin, or free spin. Once active, a symbol will be chosen at random. If instances of the chosen symbol are part of a win, they are locked in and held with Scatters and Nitro Multipliers during a Respin.
The feature continues as long as additional instances of the chosen symbol contribute to the NPD Holding Cell winning streak, or if another NPD Holding Cell feature is triggered.
At the end of the feature, all locked-in symbols will pay if they generate a win, and the game returns you to regular gameplay. The NPD Holding Cell feature can be triggered multiple times during a round, and may also trigger during a current NPD Holding Cell feature.
Nitro Booster
The Nitro Booster is positioned above the main reel set, consisting of 3 Flippers which may award features before or after the main reels stop, or after a win evaluation. The features available are as follows:
- Dirty Dawgs – This feature selects a random symbol for pay evaluation. A scattered win may begin on any reel, but the selected symbol has to appear on 3 other reels. The win is paid from both left to right and right to left when the Both Ways mechanic is active.
- Gritty Kitty – This feature replaces a random number of High-paying symbols with the Dirty Dawgs symbol.
- Pug Thugs – Moves a randomly chosen Nitro Reel to a different position in order to create a win or extend an existing one.
- Rogue Rats – Positions a random number of Nitro Reels onto the main reel set.
- Nitro Wild – Fills all positions below Nitro Reels with regular Wilds.
- Nitro Match – Fills all Nitro Reels directly below to a symbol on the same or adjacent reel to try and create a win.
- Nitro Upgrade – Increases the size indicator and the number of ways of all Nitro Reels directly below it.
- Max Rows – Expands the main reel set to a maximum height of 8 rows.
- Respin – Awards a spin where Scatters, Wilds, Nitro Multipliers, and Nitro Reels remain in their position.
- Both Ways – Allows wins to be generated from the leftmost and rightmost reels.
Boss Battle
The Boss Battle Bonus triggers when 3 Boss Battle Coins appear on the Nitro Booster, awarding 3 Shots. During this time, the main reels and Nitro Booster are temporarily replaced by a new 7×8 grid.
Each position will either be empty or filled with a Coin value or Max Win. Each coin hit is collected and the position is emptied, resetting the Shots to 3.
The Boss Battle round ends when no shots remain, or the Max Win is awarded. The collected value times your current bet is paid out, and the main reel set and Nitro Booster return to normal.
X-iter
- Bonus Hunt – One spin which is 4 times more likely to trigger Free Spins (3x your bet)
- Gang Warfare – One spin where the Nitro Booster is full of features (10x your bet)
- NPD 4EVA – Guarantees a round that triggers the NPD Holding Cell feature (25x your bet)
- Bonus – Guarantees entry into Free Spins (100x your bet)
- Super Bonus – Guarantees entry into Super Free Spins, where all spins are played with Max Rows and Both Ways active, including the NPD Holding Cell Feature triggering every spin (500x your bet)
Free Spins
Landing 3, 4, 5, or 6 Scatters in the base game triggers the Free Spins round, awarding 8, 12, 16, or 20 Free Spins respectively. Landing at least 1 Super Bonus Scatter will automatically award the Super Free Spins round. The Super Bonus Scatter can only appear within a Nitro Reel.
The Free Spins round begins with a Safety Level of 4 rows. Each win advances the Safety Level by +1 row. Nitro and Big Nitro Reels can advance the Safety Level by several rows if stacked above the current level, up to a total of 8 rows high.
During Free Spins, all Nitro Reels are held for the duration of the round. Landing 3 or more Scatters will award additional Free Spins, determined in the same manner as the initial Free Spins trigger.
Super Free Spins
The Super Free Spins round is played with Max Rows and Both Ways active, including the NPD Holding Cell feature triggering on every spin.
Pros and Cons of Nitropolis 5
Pros:
- The Super Free Spins round is available to UK players
- Bonus Buy and Ante Bet features
- Each character has their own unique feature
- Exciting Boss Battle, separate from Free Spins
- Nitro Booster packed with preloved modifiers from previous titles
- Opportunity to win Both Ways
- Impressive max win cap of 50,000x your bet
- Exceptional design, high-quality graphics, and captivating sound effects
Cons:
- Low RTP of 94%
- Max bet limited to £.€50 per spin
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Conclusion
The Battle of Nitropolis series was quite the experience, and more varied than we thought it would be. We wondered just how varied it could get, considering that there were already 4 standalone Nitropolis slots before it, but we were pleasantly surprised with the direction in which ELK Studios decided to take each game.
Everyone was expecting an epic final showdown in Nitropolis 5, and ELK Studios has delivered. The disarray, anarchy and chaos in the background are mirrored only by the chaos that ensues on the reels when Nitropolis 5 gets going. Once again, Nitropolis 5 welcomes the return of some staple features like Nitro reels, Nitro upgrade, and more, making it feel almost as familiar as it does new. Despite the presence of familiar features, there’s much to experience if you’re hoping for new and exciting features.
It was quite a task to understand it all, and an even bigger one to review it. The Nitropolis series has the tendency to thrill and confuse in equal measure, and the way the features can work in synchronisation really puts ELK’s innovative capabilities into perspective. The ability to make players wonder how they even dreamed of what must be a mathematical minefield is an ability that few providers possess, but ELK truly are one of the big innovators.
The maximum win of Nitropolis 5 is crazy at 50,000x the bet – the same as previous games. While substantial, it could have perhaps been higher for the big finale, but then again, is that perhaps too much to ask?
Overall, the ultimate showdown really was an epic battle, and should ELK Studios decide to put the series to rest here, they can do so knowing that it went out with a bang.
Welcome Bonus
