Nitropolis 4 Slot

Nitropolis 4 Slot
Published Date · Feb. 16, 2023 · Last Updated · Feb. 22, 2024
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Nitropolis 4 Slot Review

Nitropolis 4 Slot Overview

That’s right, the fourth installment of ELK Studios’ hugely popular Nitropolis slot series has landed, with the whole gang back with a bang! There are plenty of fun and exciting features to explore, including the Nitro Multiplier, the X-Iter and the Super Bonus. On top of all that, there’s an incredible max win of 50,000x your bet. This is one sequel slot game you will not want to miss - find out everything you need to know in our Nitropolis 4 slot review.

Nitropolis 4 Slot Details











50,000 x

Software Provider

ELK Studios



Design and Layout

Scatter Symbols Slots, 6 Reel Slots, Wild Symbol


Bonus Round, Multiplier, Free Spins

If you’re a fan of bonus features in your slot games, you’ll be hard-pressed to find a game that’s packed with as many of them as Nitropolis 4. With bonus rounds, multipliers, Wild symbols, and much more, it’s the ideal game for someone looking for some edge-of-their-seat excitement from their next online slot game. Chuck on top a max win of 50,000x your stake, and this really is a fantastic sequel slot that has everything you could ever want!


50,000x Max Win

Wild Symbols

Win Multipliers


Low RTP Rate

High Volatility

How To Play Nitropolis 4 Slot

The base game of Nitropolis 4 is a classic 6x4 reel, which offers you 4096 ways to win.

The bet sizes available in this game range from a minimum of £0.20 up to a maximum of £100.

Your aim is to match three to six symbols from the left to right in order to trigger a win, with the Premium Character symbols offering the biggest payouts.

Avalanche Mechanic

This game uses the classic Avalanche mechanic, which sees winning symbols removed from the reels once they have paid out.

This leaves space for them to be replaced by new symbols falling onto the reels and potentially delivering further wins. This can occur over and over again, until a win is not triggered by the new symbols.

Wild Symbols

The Spiky Mine symbol appears as this game’s Wild symbol. It can appear anywhere on the grid, replacing any pay symbol to complete winning combinations.

Nitropolis 4 Slot Features

Nitropolis has a host of exciting features, so let’s dive right in!

Nitro Multiplier Bonus

If you land a Nitro Multiplier symbol on your game board, all of your winnings are multiplied by either 4x, 6x, 10x, or 12x! If you’re lucky enough to land more than one, your multiplier bonus will stack, which offers plenty of big win potential.

Nitro Booster Bonus

There are two Nitro Booster screens above the game board, which will randomly trigger one of eight Nitro Booster bonus features in the base game. These Booster features include:

  • Both Ways - you can now win from both right to left and left to right
  • Garbage Collect - random symbols are removed at the end of each spin, triggering the Avalanche mechanic
  • Re-drop - at the end of the Avalanche sequence, Nitro Reels and Bonus Symbols are frozen in place while the remaining symbols are replaced
  • Max Rows - the game board is expanded to eight columns, making a 6x8 grid
  • Nitro Match - a Nitro Reel on the grid is matched with a present symbol to make a win
  • Nitro Wild - an existing Nitro Reel is filled with Wild symbols
  • Nitro Appear - a Nitro Reel of a random size will be randomly placed on the grid
  • Nitro Upgrade - an existing Nitro Reel will have its value boosted

Bonus & Super Bonus

Landing three or more Bonus symbols triggers the Free Spins Bonus.

- 3x Bonus symbols = eight free spins

- 4x Bonus symbols = 12 free spins

- 5x Bonus symbols = 16 free spins

- 6x Bonus symbols = 20 free spins

The Nitro Reels are frozen in place for the duration of your bonus round.

Matching three or more Bonus symbols during this bonus round will re-trigger it and award additional free spins.

If a Super Bonus symbol is used when triggering the bonus, you’ll unlock the Super Bonus. This has all the same features as the normal bonus round, but you get to play on the 6x8 grid and have “Win Both Ways” enabled from the start.

X-Iter Bonus

If you don’t want to wait to trigger a bonus feature, you can buy your own through the X-Iter feature. Here’s a list of all the bonuses you can purchase with this feature.

  • Super Spin - pay 25x your stake to unlock a spin with Max Rows and Win Both Ways activated
  • Bonus Hunt - pay 2x your stake to get more than double your chance of triggering the bonus round
  • Bonus - pay 100x your stake to unlock a guaranteed bonus round
  • Super Bonus - pay 500x your stake to unlock a guaranteed Super Bonus
  • Nitro Booster - pay 10x your stake to unlock two guaranteed Nitro Booster modifiers
  • This feature is not available to UK-based players.

Play Nitropolis 4 Demo for Free

Want to play for free first without staking real money? Try out the Nitropolis 4 slot demo in free play! Developers use free play online slot demos as a vehicle to get players excited for real-money gameplay. Think of slot demos as your proving ground to learn exactly how a slot works before you stake real money.

Nitropolis 4 Slot RTP & Volatility

One of the potential downsides to this game is the below-average return to player, which stands at 94%. For reference, the slots industry average is 96%.

It is considered a high volatility slot game, which means that triggering wins can seem quite infrequent at times. However, the wins you do land should be higher than those you would find on other, lower volatility games.

Nitropolis 4 Slot Graphics & Audio

Nitropolis 4 (ELK Studios) 1
Nitropolis 4 (ELK Studios) 2
Nitropolis 4 (ELK Studios) 3
Nitropolis 4 (ELK Studios) 4

Nitropolis 4 Slot on Mobile

As the Nitropolis 4 online slot game runs on Javascript and HTML5, the game is fully compatible with any mobile device. As long as you have a steady internet connection, you can enjoy this game from anywhere.

Nitropolis 4

Nitropolis 4 FAQs

When will Nitropolis 4 slot be released?

23rd February 2023.

Are there free spins in Nitropolis 4 slot?

Yes - the slot's in-game bonuses can grant you up to 20 free spins.

How volatile is Nitropolis 4 slot?

The slot is rated as high volatility.

Can I play Nitropolis 4 slot for free?

Yes - online casinos will have a demo version for you to sample for free.


Tim Williams

Head of Content

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