Nitropolis 4 Slot Review


Nitropolis 4 takes players on another thrilling adventure with the nitro gangs, continuing the saga that began with the original Nitropolis slot in 2020. The game’s storyline revolves around the pursuit of precious green nitro, and it has evolved over the course of multiple editions.

In Nitropolis 1, players were introduced to the Dirty Dawgs, Pug Thugs, Rouge Rats, and Gritty Kitties, all competing for control of the valuable nitro. As the story progressed in Nitropolis 2, Sergeant Nitro Wolf entered the scene to try and bring stability to the chaotic situation. However, in Nitropolis 3, Mr. Nitro Wolf fled to a warmer location in search of peace, setting the stage for a new battle between the gangs.

The Nitropolis series has taken players on a journey through various settings, from a dystopian metropolis to a tropical beach, and now, to the depths of the ocean. Throughout the series, the games have been infused with an adrenaline-packed atmosphere, with Nitro reels playing a pivotal role. These Nitro reels offer the potential to boost the reel setup to 6×8, activate Win Both Ways, and introduce features like Nitro Boosters and Big Symbols, making every spin exciting and memorable.

Nitropolis 4 features 6 reels and 4 to 8 rows, starting with 4,096 ways to win. Players can place bets ranging from a minimum of 0.20 to a maximum of 100. While the game’s RTP has been lowered from previous versions (now at 94%), the potential maximum win has been increased significantly to an impressive 50,000 times the bet.

To aid players in their quest for big wins, Nitropolis 4 offers a range of exciting features, including Wild Symbols, Avalanche, Big Symbols, Nitro Reels, Nitro Multiplier, Nitro Booster, Bonus Game, and X-iter mode. These features contribute to the game’s high volatility and create opportunities for players to land substantial payouts.

Overall, Nitropolis 4 continues the action-packed and visually captivating journey of the nitro gangs, providing players with an engaging and potentially rewarding slot gaming experience.

Nitropolis 4 Slot Information

The game’s design in Nitropolis 4 immerses players in a futuristic world where the nitro gangs venture out to sea in search of valuable treasures beneath the surface. Here are some key details about the game’s design and symbols:

  1. Futuristic World: The game’s backdrop features a futuristic world with large structures reminiscent of oil rigs situated at sea. This setting creates a unique atmosphere for the gameplay, setting the stage for an underwater adventure.
  2. Compatibility: Nitropolis 4 is designed to be accessible on various devices, including mobiles, tablets (notepads), and desktop computers. Players can enjoy the game’s action and features on their preferred device, making it convenient for a wide range of players.
  3. Winning Combinations: To create winning combinations in Nitropolis 4, players need to land 3 or more of the same symbol type on adjacent reels starting from the far left. When this occurs, it activates the Avalanche feature, which can lead to consecutive wins as symbols are replaced by new ones.
  4. Symbol Hierarchy: The game features a hierarchy of symbols with varying payouts:
    • Lower Paying Symbols: These include the standard card symbols J, Q, K, and A. Landing 6 of the same lower paying symbol type pays out 0.3 times the bet.
    • Medium Paying Symbols: These symbols represent the emblems of the Rouge Rats, the Pug Thugs, the Gritty Kitties, and the Dirty Dawgs gangs. If you manage to land 6 of the same medium paying symbol type, it pays out between 0.8 times to 1 times the bet.
    • Higher Paying Symbols: The leaders of the Rouge Rats, the Pug Thugs, the Gritty Kitties, and the Dirty Dawgs gangs are the higher paying symbols. Landing 6 of the same higher paying symbol type pays out between 1.25 times to 3 times the bet.
  5. Special Symbols:
    • Scatter Symbol: The submarine serves as the game’s scatter symbol. Scatters can trigger bonus features or free spins, depending on the game’s mechanics.
    • Super Scatter Symbol: A super scatter symbol is similar to the scatter but is marked with the word “Super” added to the top of the symbol. It may have enhanced properties or trigger specific bonus features.
    • Wild Symbol: The naval mine is the game’s wild symbol, which can substitute for other symbols to create winning combinations.
    • Big Symbols: During spins, you can land big symbols that can expand up to 3×3 in size, potentially leading to significant wins.
  6. Nitro Reels and Nitro Multipliers: As part of the game’s features, Nitro Reels and Nitro Multipliers can appear, adding excitement and potential for larger payouts. Nitro Reels can cover multiple symbol positions and contain various symbols and multipliers.

Overall, Nitropolis 4 offers players a visually appealing and dynamic gaming experience with its futuristic theme, diverse symbols, and engaging features that can lead to substantial rewards.

Nitropolis 4 Slot Features

What is the max win in the slot Nitropolis 4?

You can win up to 50000X the bet.

What features are available in the slot Nitropolis 4?

The features are Wild Symbol, Avalanche, Big Symbols, Nitro Reels, Nitro Multiplier, Nitro Booster, Bonus Game and X-iter.

Wild Symbol

The game’s wild symbol helps enable more winning combinations by substituting for all symbols, except for the scatter symbols.


When you create a win, the avalanche feature is activated, whereby winning symbols disappear from the reels and new ones fall down to cover the empty positions. An extra row is added at each avalanche, where you can get up to 8 rows per reel, thus increasing the number of ways to win. Nitro Multipliers and Nitro Reels that are part of a win will respin. This avalanche continues as long as new wins are created, with the total win being paid out when no more wins are created.

Big Symbols

During your spins, big symbols can randomly land, where these can be of sizes 2X2 or 3X3. A big symbol that is 3X3, corresponds to 9 symbols of the symbol type that it shows. These big symbols can contain low, medium, high paying and wild symbols.

Nitro Reels

The Nitro Reels covers two symbol positions, and it is loaded with either 4, 6, 8, 10 or 12 1X1 payout symbols. You can also land Big Nitro Reels which covers 6 symbol positions, and these are loaded with either 2, 3, 4, 5 or 6 2X2 payout symbols. The Nitro Reels can contain super scatter symbols and that’s only where they can land, but then it only counts as 1X1 super scatter per Nitro Reel that it’s within.

Nitro Multiplier

This symbol covers two symbol positions and will multiply all wins in view, where it counts as a 1X1 symbol type. It can land with values of either 4X, 6X, 8X, 10X or 12X and it is multiplicative if you have landed multiple Nitro Multiplier at the same time.

Nitro Booster

Nitropolis 4 offers players a variety of Nitro Boosters, each with its unique function and potential to enhance the gameplay experience. Here’s a breakdown of the 8 different Nitro Boosters and what they do:

  1. Redrop: When you land the Redrop Nitro Booster, all scatter symbols and Nitro Reels are retained, while the other symbols are removed. This initiates a redrop feature where new symbols fall into place to cover the empty positions, potentially leading to new wins.
  2. Both Ways: With the Both Ways Nitro Booster, wins are created not only from left to right but also from right to left. This increases the chances of landing winning combinations in both directions, offering more opportunities for payouts.
  3. Garbage Collect: The Garbage Collect Nitro Booster randomly selects symbols, removes them from the reels, and triggers the avalanche feature. This feature can help clear the way for new symbols to fall into place, creating additional winning possibilities.
  4. Max Rows: When Max Rows is activated, it expands the reels to their maximum height, allowing for up to 8 rows per reel. This increases the number of ways to win and enhances the potential for larger payouts.
  5. Nitro Appear: The Nitro Appear Nitro Booster introduces a Nitro Reel of random size onto the reels. This Nitro Reel replaces the symbols in the position where it lands, potentially contributing to winning combinations.
  6. Nitro Wild: If you land the Nitro Wild Nitro Booster and do not currently have a Nitro Reel in play, this feature is kept pending until you land one or until the bonus game ends. When activated, it fills an existing Nitro Reel with wild symbols, increasing the chances of forming winning combinations.
  7. Nitro Upgrade: The Nitro Upgrade Nitro Booster enhances the Nitro Reels on the same and adjacent reels. It can add additional symbols or multipliers to the Nitro Reels, potentially leading to more substantial wins. Like Nitro Wild, if you lack a Nitro Reel at the moment, this feature remains pending until one is landed or the bonus game concludes.
  8. Nitro Match: When you encounter the Nitro Match Nitro Booster, an existing Nitro Reel will be matched with a symbol in view. The Nitro Reel is then filled with this matching symbol type to create a win. If no immediate match is possible, the Nitro Reel will be matched with an adjacent Nitro Reel or, if still not possible, with the highest value symbol on the adjacent reels. Like other Nitro Boosters, if you don’t have a Nitro Reel at the moment, this feature will remain pending until one is obtained or the bonus game ends.

These Nitro Boosters add depth and excitement to the game, allowing players to strategize and potentially increase their chances of landing significant wins as they explore the underwater world of Nitropolis 4.

Bonus Game

If you land 3 or more scatter symbols, the bonus game is activated. Depending on whether you land 3, 4, 5 or 6 scatter symbols, you will receive 8, 12, 16 or 20 free spins respectively. You can retrigger extra free spins during the spins where you get the same number of free spins per scatter symbols as at activation and all Nitro Reels that land are sticky during the remaining spins. If you trigger the bonus game with at least 1 super scatter symbol, then the super bonus game is activated, where Both Ways and Max Rows are activated.

Each new free spin that results in a win, will increase the safety level by 1 row. A subsequent free spin always starts with the number of rows that the safety level has reached.


If you want to take advantage of any of the features immediately, you can use the X-iter mode. You can choose between the following options:

2X (Bonus Hunt) = You get to take part in a spin that has more than twice the chance of activating the bonus game.

10X (Nitro Booster) = You get to enjoy a spin where the Nitro Booster provides 2 features when activated.

25X (Super Spin) = You get to enjoy a spin where the Max Rows and Both Ways are activated.

100X (Bonus Game) = You activate the normal bonus game.

500X (Super Bonus Game) = You activate the super bonus game, where the Both Ways and Max Rows are activated.

Nitropolis 4 Slot Conclusion

Nitropolis 4 continues the legacy of the Nitropolis series, providing players with an exciting and entertaining gaming experience. The series has consistently introduced new features and upgrades with each installment, keeping players engaged and delivering exceptional gameplay.

The original Nitropolis set a high standard for the series, showcasing the elegant interplay of features such as Nitro Reels, Avalanche, and Nitro Boosters. The concept of Nitro Reels, increasing rows, and the use of Nitro Boosters made each spin a potentially lucrative and engaging experience. The third release in the series saw a substantial increase in the maximum win potential, raising it to an impressive 50,000 times the bet.

In Nitropolis 4, players are transported to a new location, an underwater setting reminiscent of an oil rig, where the gangs are on a quest for riches. ELK Studios’ commitment to design and innovation is evident once again, as they continually introduce novelty into each version of the game. While the core elements remain familiar, such as the gangs and the nitro-themed gameplay, new features like Nitro Multipliers add a fresh layer of excitement. The introduction of Nitro Multipliers, which can reach values of up to 12X and can be combined, provides players with significant opportunities for big wins. The Garbage Collect feature also adds to the excitement, creating additional chances for wins.

ELK Studios’ dedication to perfection and continuous improvement is apparent in Nitropolis 4. However, it’s worth noting that the game comes with a slightly lower RTP compared to previous versions. While having a consistent RTP can be reassuring for players, some may have preferred a slightly higher return.

Overall, Nitropolis 4 builds on the success of the series, offering players the chance to experience a thrilling and potentially rewarding slot game. The addition of Nitro Multipliers and other enhancements ensures that players have ample opportunities to achieve significant wins in this action-packed slot.


Quick information

Overall 4.7
Title: Nitropolis 4
Developer: Elk Studios
Reels: 6
Rows: 4-8
Paylines: 4096
RTP: 94%
Hit Frequency: N/A
Max Win: 50000
Volatility: High
Min/Max Bet:: €0.2/€100
Release Date: 23/02/2023

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