Nitropolis 4 is a 2023 release by ELK studios and the fourth slot in the series. I guess the clue was in the name there! Welcome to the Freak Show!
The gang is back and ready to drill for more Nitro after discovering an unused offshore oil rig to find hidden treasure. The Nitro reels allow for set-ups of up to 6×8 and the grid activates Wins Both Ways, with big symbols, free spins and nitro boosters. Eat, Sleep, Drill, Repeat!
This is one of those whacky cartoon-themed games like the Granny vs. Zombies slot from PearFiction. There are no leprechauns in this one! This is one hell of a production from ELK.
The RTP is 94%, and the fun kicks off with 4096 ways to win across six reels with high volatility. Not as high as the Serial slot from Nolimit City, but it’s getting there!
The maximum win is an eye-watering 50,000x your bet!
Nitropolis 4 comes with seamless gameplay on mobile IOS and Android mobile devices. That is the minimum we would expect of an ELK game, to be honest, they are known for their “mobile first” design.
Graphics
The reels on the Nitropolis 4 slot are set in a futuristic world, with vast buildings in the background and set inside a rig with lots of steel on display.
The two screens at the top of the reels display the boosters that you can randomly trigger. These include Max Rows, Nitro Reel, Garbage Collect, Nitro Wild, Nitro Match, Nitro Upgrade, Redrop and Both Ways.
The wild symbol in this slot sticks to normal rules and will substitute all other paying symbols except for the scatters.
The design of this game is out of this world! And the soundtrack is cool, too.
Screenshot
Gameplay
Nitropolis 4 features six reels and four to eight rows with a starting configuration of 4096 ways to win. The minimum bet is 0.20, with the maximum set at 100.00. At least three matching symbols from left to right will form a winning payout.
The lower value symbols are A, K, Q and J; six of these pay out x0.3.
There are also medium pay-out symbols such as the Dirty Dawgs, the Gritty Kitties, the Pug Thugs and the Rouge Rats, which pay between x0.8 and x1 the wager.
Higher-paying symbols include the leaders of the middle-paying symbols, which pay between x1.25 and x3 of your bet.
Bonuses
Big Symbols
Big symbols can randomly appear and will be 2×2 or 3×3.
Nitro Reels
Nitro Reels cover two blocks and come with 4, 6, 8, 10 or 12 pay-out symbols. You can also get Big Nitro Reels that will cover six positions and be loaded with either 2, 3, 4, 5 or 6 2×2 square symbols.
Nitro Multiplier
The multiplier symbol covers two positions and multiplies all wins with values of 4x, 6x 8x, 10x or x12. They are added together if a few land together for big wins.
Nitro Booster
There are also 8 different Nitro Boosters:
– Redrop: only scatters and nitro reels remain
– Both Ways: win from left to right and right to left
– Garbage Collect: Random symbols are removed
– Max Rows: Expands the reels to a maximum of eight rows
– Nitro Appear: = The nitro reel will place a block on the reels where it replaces the symbols it lands on.
– Nitro Wild: An existing Nitro Reel will fill with wild symbols.
– Nitro Upgrade: The Nitro Reels upgrade on the same and adjoining reels, and other symbols and/or multipliers are added.
– Nitro Match: An existing Nitro Reel is matched with a symbol, and the Nitro Reel is filled with it to create a win.
Bonus Game
Three or more scatter symbols will activate the free spins. For 3, 4, 5 or 6 scatters, you get 8, 12, 16 or 20 free spins, respectively.
Free spins can retrigger, and nitro reels remain sticky for the rest of the Nitropolis 4 free spins. Every new free spin that forms a win increases the safety level by one row.
X-iter
If you want to buy the features, you can choose the following options (not in all jurisdictions):
– Bonus Hunt: pay x2 and double the chance to activate the bonus
– Nitro Booster: x10 will get you 2 features when activated.
– Super Spin: x25 gets you a spin with max and both-ways features.
– Bonus Game: x100 activates the bonus game
– Super Bonus Game: x500 activates the super bonus, with both ways and max rows activated.
Summary
Nitro Booster 4 is another first-class slot following on from its three earlier cousins. It’s high-octane, with plenty of energy and lots happening on the reels. It has had an upgrade with a maximum win of x50,000 which will ensure the slot’s continued popularity.
You can test this one out in demo mode. If you are unfamiliar with the series, it is worth using this feature to get to grips with how it all works before spinning for real money.
This is a slot machine with a difference!
Wombat Score 4.7/5
This is such a great looking game! And it has some good features.
FAQs
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Can you re-trigger the bonus round?
To fire up the Bonus Round, you will need 3, 4, 5, or 6 scatters to fall in one Avalanche , and this triggers 8, 12, 16, or 20 free spins, respectively. If you land scatters in the bonus, you will re-trigger the free spins (or falls). Nitro Reels freeze into place for the whole of the feature, and each time you win the safety level increases by one row.
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What is the Nitro-Booster?
There are two screens on top of the reels that set off the Nitro Booster features on the main reels at random. There are eight features: Max Rows, Garbage Collect, Nitro Reel, Nitro Wild, Nitro Upgrade, Nitro Match, Redrop and Both Ways. Welcome to Crazy Town!
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What is the X-iter Feature?
If you can’t be bothered to wait for the bonus round to drop in naturally, X-iter™ allows you to crank up the action with five different bonus modes starting with a 2x bet ( you double your chance to land a bonus) to a 500x Super Bonus with Max Rows and Both Ways activated.
X-iter is only available in certain countries.