Nitropolis 4 Slot Review

Our score 5.0 5.0 /5
User rating
Paylines: +4096

Nitropolis 4 is the newest addition to the Nitropolis series of games from ELK Studios and this time you will be transported to an oil rig for this dystopian world run by dogs.

Theme post-apocalyptic
No. of Reels 6
Game type Video Slot
Release Date 2023
Bonus Rounds Yes
Software provider ELK Studios
Scatter Yes
Free spins Yes
Updated June 2, 2023

Game Screenshots

Play Nitropolis 4 at these suggested casinos

Our recommendation

Two Fat Ladies

1 2 3 4 5
Welcome bonus Get 200% Match Up to £88 + 20 Free Spins

New players only. Valid until further notice. Min deposit £10 for 200% Bingo Bonus [BB] up to £88 + 20 Free Spins [FS] on Irish Luck (valid for 3 days respectively, wins cap: £3). FS wins granted in Games Bonus [GB] after all FS used. GB valid on selected games only. Wagering requirements [WR]: 4x (deposit + BB funds) & 35x GB funds. WR vary by game. GB wins cap: £100 + initial bonus amount. UK: deposit balance can be withdrawn at any time. 18+. Withdrawal restrictions & Full T&C apply . Please play responsibly. #AD

Grosvenor Casinos

1 2 3 4 5
Welcome bonus Deposit £20, Play with £50

*18+. New customers only. Min deposit £20. Paypal excluded. Max non-withdrawable bonus £30. Playable on selected games only. 30x dep and bonus wagering required. Expires within 30 days. Max win £2,000. T&Cs apply. Please play responsibly. #AD

Mega Casino

1 2 3 4 5
Welcome bonus 100% Bonus up to £50

*18+. Automatically credited upon deposit. Cancellation can be requested. First Deposit Only. Min. deposit: £10, max. Bonus £50. WR of 30x Deposit Plus Bonus amount (Slots count 100% and any other game 10%) within 30 days. Max bet is 10% (min £0.10) of the Bonus amount or £5 (lowest amount applies).Bonus must be claimed before using deposited funds. Bonuses do not prevent withdrawing deposit balance. First Deposit/Welcome Bonus can only be claimed once every 72 hours across all Casinos. Bonus Policy applies. Please play responsibly. #AD

It has six reels and 4,096 ways to win, but additional rows can be added to increase this up to a maximum of 262,144 ways to win as part of the avalanche feature.

This game has more bonus features than you can imagine with big symbols, nitro reels, nitro multipliers, nitro boosters and a free spins bonus game all available. Give its reels a spin today for potential max wins of up to 50,000x your stake.

If you think this could be the slot game for you, carry on reading our Nitropolis 4 review for all the information you need to know about this game.

How to Play

Nitropolis may appear daunting at first to play but it is very easy. You can place a bet per spin of between 20p and £100 by using the coin symbol below the reels. Once your bet is set, hit the arrow button to get the reels moving.

Winning combinations are formed in this slot game by landing three or more matching symbols on a payline. This must start from the leftmost reel.

The symbols on the reels of this game are:

  • J
  • Q
  • K
  • A
  • Rogue rats badge
  • Pug thugs badge
  • Gritty kitty badge
  • Dirty dawgs badge
  • Rat boss
  • Pug boss
  • Kitty boss
  • Dawg boss
  • Wild
  • Scatter


In the base game, the dawg boss is the highest value symbol on the reels and he can award up to 3x your stake for six in a winning combo. With the bonus features in play, there is the chance to get up to 50,000x your stake.

Special Features

There are seven special features in the Nitropolis 4 slot game including a wild symbol, an avalanche feature, a big symbols feature, a nitro reels feature, a nitro multiplier feature, a nitro booster feature and a bonus game feature.

The wild symbol will replace almost every other symbol on the reels to help form new winning combinations and potentially award larger cash prizes.

Everyone’s favourite feature, the avalanche feature, is present in this slot game. Each time a winning combo is formed, the symbols in that combo will be removed from the reels and new symbols will drop in place to potentially create more winning combinations. Each time this feature is triggered, an extra row of symbols is added to the top of the existing rows, up to a maximum of eight. Each time an additional row is added, the number of ways to win increases:

  • 4 rows – 4,096 ways to win
  • 5 rows – 15,625 ways to win
  • 6 rows – 46,656 ways to win
  • 7 rows – 117,659 ways to win
  • 8 rows – 262,144 ways to win

The avalanche feature ends when no new winning combinations are formed.

Next, we have the big symbols feature. These super and mega symbols, which are 2×2 and 3×3 in size, can randomly land on the reels.

This game has a nitro reels feature just like its predecessors, where they will cover two symbol positions and have between four and 12 payout symbols that are 1×1 in size. Large nitro reels are also available and these will cover six symbol positions with between two and six payout symbols that are 2×2 in size.

Also covering two positions and multiplying wins is the nitro multiplier. Above the reels, you will spot a multiplier value and this is the number that you win will be multiplied by. Multipliers of up to 12x are available as part of this feature.

As you spin the reels, you may be awarded modifiers known as nitro boosters. These boosters can provide you with:

  • Nitro wilds – a nitro reel is filled with wild symbols
  • Nitro upgrade – one type of symbol will be completely removed from the reels
  • Maximum rows – the rows expand to provide you with the maximum of eight
  • Nitro match – a nitro reel is filled with just one type of symbol
  • Redrop – all symbols except for the bonus symbols and nitro reels are removed from the reels to let new symbols take their place
  • Win both ways – you can potentially get double payouts as wins will now pay from both left to right and right to left
  • Nitro appear – a randomly sized nitro reel will be added to the reels
  • Garbage collect – one type of symbol will completely be removed from the reels and an avalanche will be triggered

Finally, we have the bonus game feature and this is triggered by landing three or more bonus symbols on the reels. The more bonus symbols you land, the more free spins you will be awarded:

  • 3 bonus symbols – 8 free spins
  • 4 bonus symbols – 12 free spins
  • 5 bonus symbols – 16 free spins
  • 6 bonus symbols – 20 free spins

During this feature, all of the nitro reels will become sticky and remain in place for the entirety of the round. You can get extra free spins by landing more bonus symbols on the reels.

As this is an ELK Studios slot game, it also comes with an X-iter feature where you can buy add-ons to help your gameplay. However, this is not available to players in the UK.

Graphics and Sounds

The team at ELK Studios never disappoints with their graphics and so you already know to expect a visually fantastic game before you even start spinning. Nitropolis 4 does not let us down and players are transported to an almost post-apocalyptic world where the Nitro gangs and dogs rule the roost. As this is the fourth game in the series, this time the setting will be on an oil rig and this acts as the backdrop to your reels.

This is a bright, colourful and eclectic looking slot game with the standard playing card symbols acting as your low value symbols. The high value symbols include the badges of each of the gangs plus the boss of each gang such as the pug boss, the cat boss and the dawg boss. A lively and futuristic rock soundtrack plays in the background as you spin which massively increases the excitement of spinning the reel of this slot game.


Nitropolis 4 is an exciting online slot game from ELK Studios and is sure to appeal to those who have enjoyed the previous three games. Not only does this game offer fantastic graphics and a unique theme that you will not find anywhere else, but it is absolutely jam-packed with bonus features! Players will especially enjoy the avalanche feature, big symbols, nitro reels and free spins round. With wins of up to 50,000x your stake, this is up there as potentially one of the highest payout slots on the market today.

You can check out the Nitropolis 4 slot at a Which Bingo recommended online casino.

Jennifer Mcfadyen



Jennifer is a writer with over five years of experience in the online casino industry. She has a First Class Honours in Media and Journalism and specialises in writing online casino reviews, slot reviews and gambling news content. Public relations are also other areas of interest for Jennifer and she has worked across these industries before setting up her own content company.

User Reviews

Based on 0 reviews