Nitropolis 5 Online Slot Review

ELK Studios has scored a massive hit with their Nitropolis series of online slots, and Nitropolis 5 could be the best in breed. Cartoon pugs, Dobermans, rats, and cats appear against an industrial backdrop and there are 4,096 ways to match them across 6 reels and 4 rows for a win.

Wild birds can substitute for others, and giant symbols make it easier to form winning combinations. Avalanches trigger on every win and these can lead to more wins as reels expand to a maximum of 8 rows.  Nitro Reels also give more ways to win, as up to 12 symbols stack on top of each other, and these can come with up to 12x multipliers. 

Nitro Boosters award modifiers such as respins, a win both ways mechanism, and more. Standalone features of the Nitropolis 5 slot machine include Boss Battle respins and free spins with sticky Nitro Reels. Super free spins come with 8 rows and win both ways from the start.

This is a high volatility game with a relatively low 94.00% RTP. You can unleash the animal symbols across desktop and mobile platforms at the top casino sites online to win a maximum of 50,000x the total bet.

How to Play the Nitropolis 5 Slot

Like episodes 1 – 4, the Nitropolis 5 online slot stars detailed cartoon characters with expressive faces and dressed in a variety of outfits. The ninja cat, biker rat, Doberman soldier, and welder Pug appear alongside high card symbols and a wide range of bonus emblems in an industrial setting. The animals fight against a wolf, with the story unfolding in a fantastic animated sequence as the game loads.

The controls stick to the standard ELK Studios pattern, and you simply tap the coins button to reveal 12 bet options from 0.20 to 50.00 per spin. X-iter bonus buy options are available but local laws block these in the UK, along with autoplay and quick spin features.

Nitropolis 5 has a huge range of extra features, so you’ll want to read the paytable before you play for real money. It’s under the 3 lines button and as well as details on the bonuses, it also holds a list of what symbols pay when 3 or more of the same type land on adjacent reels, starting on the left. The Doberman is the most valuable standard symbol, worth 3x the bet for 6-of-a-kind combinations. A panicked-looking bird wild symbol acts as others, and also pays 3x if it lands on all 6 reels. 

Of course, the Nitropolis 5 slot works on desktop devices, Android, iOS, and Windows mobiles in exactly the same ways, including when playing with any of the casino offers available. 

Free Spins & Other Nitropolis 5 Slot Features

Any symbols in a win explode to trigger an Avalanche of those left on the reels. New symbols drop in from the top and the feature repats if this creates a new win. The number of rows increases by 1 on each Avalanche in a sequence, to a maximum of 8, giving up to 4,096 ways to win.

Big symbols come in Super 2x2 or Mega 3x3 sizes, and can drop in at any time, helping to create winning combinations. Nitro Reels cover 2 rows and can hold 4, 6, 8, 10, or 12 examples of the same symbol to increase the number of ways to win. Big Nitro Reels cover 6 positions and hold 2, 3, 4, 5, or 6 Super 2x2 symbols. 

The Nitro Multiplier canister symbol in any place multiplies all wins on the same spin by up to 12x. 

Modifier symbols can land above the main game to perform multiple tasks on any spin –

Dirty Dawgs – Replaces high value symbols with the Doberman.

Pug Thugs – Moves a Nitro Reel to guarantee a win.

Gritty Kitty – Picks a random symbol which then pays in any places.

Rogue Rats – Places a random number of Nitro Reels onto the game.

Nitro Wild – Fills Nitro Reels with wild symbols.

Nitro Match – Places the same symbol on all Nitro Reels.

Nitro Upgrade – Increases the number of symbols on Nitro Reels below. 

Max Rows – Expands the grid to 8 rows on the spin.

Respin – Locks any Nitro Reels, Nitro Multipliers, bonus and wild symbols as other positions respin once. 

Both Ways – Combinations pay from both the left and right sides. 

Randomly an NPD Holding Cell activates, locking a random symbol away as all examples on the reels stay in place if part of a win. Everything else respins and the feature repeats for as long as new examples of the locked symbol appear.

A Mad Max style truck bonus symbol in any 3, 4, 5, or 6 places triggers 8, 12, 16, or 20 free spins respectively. Every win expands the reels, to the maximum of 8 rows, and a Safety Level feature means they don’t contract down on non-winning spins. Land Nitro Reels and they stay active for any remaining free spins. Super free spins trigger randomly and have all 8 rows active right away, plus a win both ways mechanism throughout.

Land 3 Bonus Battle symbols to trigger the Boss Bonus respins game. The grid changes to a 7x8 layout for 3 respins where only coins with money values, Max Wiin coins, or blanks appear. Anything other than blanks will reset the spin counter and the feature runs until you reach the maximum win or have 3 respins with no coins. You collect all coin values at the end.

Nitropolis 5 Slot Maximum Wins, Volatility, & Average Returns

Our Nitropolis 5 Slot Rating

Low returns aside, this is a fantastic game, with a selection of popular characters on the reels and a staggering number of bonus features. Expanding reels on a series of Avalanches make it easier to form winning combinations and continue the sequence, while Nitro Reels, numerous modifiers, and a wild bird can all add excitement to each spin.

Free spins and respins can also help build huge payouts, although the 50,000x maximum is an ambitious target that won’t happen very often, if ever. Let the rebellious pets off the leash at our recommended online slots uk casinos and see what treats you can claim from the all-action Nitropolis 5 slot machine.