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Nitropolis 4 is a new slot from ELK Studios, where we again meet the nitro gangs in a game journey. We first met them in 2020 in the original Nitropolis, where the Dirty Dawgs, Gritty Kitties, Pug Thugs, and Rogue Rats gangs fought for valuable green nitro. Over time, this specific gas became harder to find, and tension among the gangs grew. In Nitropolis 2, Sergeant Nitro Wolf arrived, hoping to bring order. However, clearing crime from the streets proved difficult. In the third game, Nitropolis 3, Mr. Nitro Wolf fled to warmer climates, seeking calm. Soon, different gangs had the same idea and followed him, leading to another confrontation.
The game design shows a future world. We follow the nitro gangs into the sea, searching for treasure below the surface. Behind the reels, large structures like sea oil rigs stand. When the bonus game starts, you go underwater. You can play on all devices: phones, tablets, and computers. A win forms when 3 or more matching symbols land on adjacent reels, starting from the left. This triggers the Avalanche function. For information on game performance and payout percentages, check our slot rating section.
Low pay symbols are J, Q, K, and A. Landing 6 matching symbols gives a win of 0.3X the bet. Mid pay symbols are the gang emblems of Red Rats, Pug Thugs, Gritty Cats, and Dirty Dogs. 6 matching symbols pay 0.8X to 1X the bet. High pay symbols are the leaders of these gangs. 6 matching symbols pay 1.25X to 3X the bet. A submarine is the Scatter symbol. There is also a Super Scatter symbol with «Super» written on it. A sea mine is the Wild symbol. During spins, Big Symbols up to 3×3 size may appear. Nitro Reels and Nitro Multipliers add layers, significantly boosting payouts. Ready to try? Find out where to play slot games.
What is the max win in Nitropolis 4?
The maximum possible win reaches 50000 times the bet.
What features are available in Nitropolis 4?
The game provides Wild, Avalanche, Big Symbols, Nitro Reels, Nitro Multiplier, Nitro Booster, Bonus Game, and X-iter features.
This game’s Wild symbol helps form more win groups by standing in for all symbols except Scatters.
When a win occurs, the Avalanche function begins. Symbols in the win disappear from the reels, and new ones drop into their places. Each Avalanche adds one row, increasing the number of rows per reel up to eight, boosting win possibilities. Nitro Multipliers and Nitro Reels that were part of a win activate again. Avalanches continue as long as new wins form. The total win pays when no new combinations appear.
During spins, enlarged symbols sized 2×2 or 3×3 may randomly land. A 3×3 symbol counts as nine regular symbols of the same type. These large symbols can be low pay, mid pay, high pay, or Wild symbols.
Nitro Reels cover two symbol spots and hold 4, 6, 8, 10, or 12 symbols of 1×1 size. You can also get Big Nitro Reels covering 6 symbol spots, holding 2, 3, 4, 5, or 6 symbols of 2×2 size. Nitro Reels may include Super Scatters, appearing only on them. Each Super Scatter on a Nitro Reel counts as one 1×1 symbol.
This symbol covers two spots and multiplies all wins in view, counting as a 1×1 symbol itself. It can appear with values 4X, 6X, 8X, 10X, or 12X. Its effect combines if several Nitro Multipliers land at the same time.
The game includes 8 different Nitro Boosters adding effects to the main reels. Here is what they do:
Respin = All Scatters and Nitro Reels stay. Others remove. Then a respin happens, filling empty spots with new symbols.
Both Ways = Wins form left-to-right and right-to-left.
Garbage Collect = Symbols chosen randomly then removed, starting the Avalanche function.
Max Rows = Expands the reels to the maximum 8 rows.
Nitro Appear = A Nitro Reel of random size placed on the reels, replacing symbols where it lands.
Nitro Wild = An existing Nitro Reel fills with Wild symbols. If no Nitro Reel, the function waits until one appears or the bonus game ends.
Nitro Upgrade = Nitro Reels on one reel and neighbor reels upgrade, adding more symbols or multipliers. If no Nitro Reel, the function waits until one appears or the bonus game ends.
Nitro Match = An existing Nitro Reel matches a visible symbol, then fills with that symbol type to create a win. If a winning match is not possible, the chosen Nitro Reel matches a neighbor. If still not possible, it matches the highest value symbol on neighbor reels. If no Nitro Reel, the function waits until one appears or the bonus game ends.
Landing 3 or more Scatter symbols begins the bonus game. Based on Scatter count (3, 4, 5, or 6), you get 8, 12, 16, or 20 free spins. During the bonus game, you can get more free spins, with the same count per Scatter symbols as the trigger. All landed Nitro Reels stay in place until the bonus game finishes. If the bonus game starts with at least one Super Scatter symbol, the super bonus game starts with Both Ways and Max Rows modes active.
Each new free spin with a win increases the safe level by 1 row. The next free spin always begins with the number of rows reached at the safe level.
For quick access to more functions, use the X-iter mode. These choices are available:
2X (Bonus Hunt) = Play a spin with twice the chance to trigger the bonus game.
10X (Nitro Booster) = A spin where the Nitro Booster gives 2 functions when active.
25X (Super Spin) = A spin with maximum rows and both ways payout functions active.
100X (Bonus Game) = Start the standard bonus game.
500X (Super Bonus Game) = Trigger the enhanced bonus game with both ways and maximum rows functions.
Rupert Tildesley
