Nitropolis 3

|ELK Studios|2022-04-05|RTP: 95 %
Home » Game provider » Elk » Nitropolis 3
Game provider
ELK Studios
Nitropolis 3
Feature Buy
Game type
Video Slots
Mobile version
Grid slot
Sticky wilds
Free spins
Bonus game
Progressive jackpot
Min. bet
Random Feature
Max. bet
Maximum win
Last update
April 3, 2022


3 votes - 4.00/5.00

Make your escape to the beach with the Nitro gangs as they flee the dystopian city on the slot from Elk Studios. Nitropolis 3 claws the cats and dogs across six expanding reels reaching 262,144 ways, further increased into millions of bet ways by Nitro Reels. As if that is not chaotic mayhem already, big symbols up to 4×4 and five intriguing modifiers are thrown in for good measure. Fly into a bonus round with sticky Nitro Reels and an expanding grid, or dive into the Super Bonus with the maximum potential of eight rows from start to finish, and you could relax on the beach with wins of up to 50,000x your stake.

Update 28th March 2022: Nitropolis 3 is live exclusively at LeoVegas Casino and sister sites from the LeoVegas group. The general release is scheduled for 5th April 2022.

Loading animation

Recommended Casino to Play Nitropolis 3

Loading animation

Slot Details

Nitropolis 3 is a cascading video slot with 6 reels, 4 rows and 4,096 ways to win as default, increasing to millions of ways. Match three or more adjacent symbols from the leftmost reel to the right for a win. You can join the canine and feline fugitives from 0.20 to 50 credits per spin. This game has a 7/10 medium/high volatility rating, a hit frequency of roughly 1 in 5 (19.2%) and a 95% RTP.

For the Nitro gangs return in this third game of the series, they’ve fled Nitropolis to get away from Sergeant Nitro Wolf’s city clean-up. Their sandy beachfront hideaway appears as the background to the play area, with a funky disco and deep house mix for the soundtrack. They’ve bought toxic barrels with suspicious-looking content, sunglasses and deckchairs in colourful graphics befitting the series.

Elk Studios Nitropolis 3 Slot - Base game
Elk Studios Nitropolis 3 Slot – Base game

The pay symbols start at the low end with J, Q, K and A, which pay 0.3x your stake for six of a kind. They are followed by the gang badges of The Rogue Rats in blue, The Gritty Kitty in pink, and The Dirty Dawgs in red for the medium pays. Six across the reels will pay 0.8x or 1x your stake. The remaining premiums are the rat, pug, kitty and dog in their gangs matching colours. Match six across the reels for 2x to 5x your bet.

The wild symbol appears as a toxic sign and cocktail and substitutes all others except for the bonus and super bonus symbols, plus the three Nitro feature symbols, detailed below. A blimp represents the bonus symbol that triggers the free spins for landing three or more. A single super bonus blimp will upgrade the bonus to the super free spins.

Nitropolis 3 Slot Features

Nitropolis and Nitropolis 2 are two innovative, first-class slots by Elk Studios. The first showcased the symbol increasing NItro Reels; the second, a Nitro Reel of spin modifiers, leaving the idea of a third release a mouthwatering prospect rather than a sigh of ‘oh, no, not another’. So without further ado, let’s see what the brilliant minds at Elk Studios have conjured up on Nitropolis 3.

There are three basic symbol types to get to grips with on Nitropolis 3. Standard 1×1 symbols, big symbol sizes of 2×2, 3×3 and 4×4 of either pay symbols or wilds, and Nitro Reels, which cover two vertical reel positions with 4, 6, 8, 10 or 12 1×1 symbols contained, framed in green with on a symbol count display. In addition, the game features 2×3 Big Nitro Reels containing 2, 3, 4, 5 or 6 2×2 big symbols. When calculating pays, big symbols are broken down into 1×1 equivalents, e.g. a 2×2 big symbol equals four standard 1×1 symbols.

Elk Studios Nitropolis 3 Slot - Expanding Reels
Elk Studios Nitropolis 3 Slot – Avalanche & Expanding Reels Game Mechanics

Core to the gameplay is still the Avalanche mechanic that cascades symbols onto the default 6×4 grid at the start of a spin sequence. Any wins are paid before they shatter and disappear to make room for new symbols to drop into place. Any space created beneath a big symbol due to an avalanche will be filled with 1×1 symbols of the same type.

With each avalanche, the reels expand with a new row of symbols. The expanding reels and avalanche combination gradually increases the play area from four rows and 4,096 ways up to the maximum height of eight rows and 262,144 ways. The addition of extra symbols from Nitro Reels can further increase the number of ways to pay into millions.

Nitro Reels that form part of a winning combo will stay on the reels and respin a new symbol during an avalanche sequence. On any non-winning spin, If the bottom half of a Nitro Reel appears in the top row, the grid expands and initiates an avalanche. A spin concludes when no new wins occur and resets back to the standard 6×4 grid for the next spin.

Elk Studios Nitropolis 3 Slot Nitro feature Nitro Reel Upgrade
Elk Studios Nitropolis 3 Slot – Nitro Reel Upgrade

Throughout the base game and bonus round, there are five spin features, which appear in green or blue Feature Frame symbols. Once activated, each can flip, during a following avalanche, to award another feature or turn redundant as a greyed out petrol pump symbol. Wild symbols may land in a Feature Frame and, if combined in a win, can flip into one of the five features and then back to a wild again once the effect has been played or turn redundant. Redrop and Both Ways appear in blue frames and activate immediately for the current stage of a spin sequence:

  • Redrop: Will queue an avalanche of new symbols for the end of a win sequence. Any Bonus symbols, Nitro Reels, Nitro Feature symbols, both ways symbols, plus the redundant redrop symbol remain, falling to the bottom of the grid before the avalanche.
  • Both Ways: With Both Ways, wins during the spin sequence are paid both ways, from left to right and right to left until the end of the spin.

Nitro Feature symbols are self-titled and appear in green frames. When triggering, Nitro Features affect all Nitro Reels on three reels – the same reel and the neighbouring reels on either side:

  • Nitro Match: Nitro Reels spin to reveal a matching symbol adjacent to the Nitro Feature symbol.
  • Nitro Upgrade: – Upgrades the Nitro Reels symbol count.
  • Nitro Wild: Nitro Reels feature wild symbols.
Elk Studios Nitropolis 3 Slot - Super Bonus
Elk Studios Nitropolis 3 Slot – Super Bonus

Land three, four, five or six bonus symbols to trigger 8, 12, 16 or 20 Nitropolis 3 Free Spins, during which Nitro reels are sticky, dropping to the base of the reels during avalanche sequences and remaining in-play throughout the bonus. A safety level is featured that increases the reel height by one row with each winning free spin, with each subsequent spin, starting with the achieved safety level.

Land three or more bonus scatters to retrigger the bonus for the same number of spins, and land scatters in combination with one or more Super Bonus blimps at any time during the game to trigger the Nitropoli 3 Super Bonus. The Super Bonus is played with the maximum reel height of eight rows throughout and with the Both Ways feature activated on every free spin.

Elk Studios Nitropolis 3 Slot - X-iter
Elk Studios Nitropolis 3 Slot – X-iter

Elk Studios’ X-iter feature offers players a choice of game modes with modified reels, super bonuses, and more for an increased bet amount. The Nitropolis 3 X-iter feature provides a selection of the five following spin scenarios:

  • Bonus Hunt | 2x Bet: A spin with more than double the chance to trigger the bonus naturally, increasing the probability of three or more scatters.
  • Guaranteed Big Nitro Reel | 10x Bet: A spin with a guaranteed Big Nitro Reel.
  • Guranteed Nitro match and Both Ways | 25x Bet: A spin with a Nitro Match and a Both Ways feature.
  • Free Spins Bonus | 100x Bet: A bonus triggering spin into free spins.
  • Super Bonus | 500x Bet: A bonus triggering spin of the Super Bonus with the maximum eight rows, sticky Nitro Reels and Both Ways throughout.

Final Verdict

Nitropolis 3 is a spellbinding blend of Nitro Reels and Nitro Booster features from the slots siblings, fused with the added rows game mechanic from the Gold series. It could have easily been named Nitropolis Gold and works well, on occasion, to keep you transfixed on lengthy win sequences of Nitro fuelled action.

During free spins, the pathway to big hits comes from increasing the safety level, gaining sticky NItro Reels and landing the right combination of Nitro features for upgrades, plus of course, a nice symbol combination. Trigger the Super Bonus, with the full maximum starting grid potential of eight rows for a tantalising prospect of wins up to 50,000 times your stake.

Nitropolis 3 – Frequently Asked Questions (FAQ)

1. On Nitropolis 3 from Elk Studios, how do you trigger the Super Bonus?
2. What other games can I play like Nitropolis 3 by Elk Studios?
3. What is the RTP for the X-iter Game Modes on the Nitropoli 3 slot from Elk Studios?


Loading animation


Loading animation


Please wait... Loading comments...

Remember, you can play Nitropolis 3 here

Loading animation