Nitropolis 4

In Nitropolis 4 Free Online Slot, developer ELK Studios provides users with an explosive gaming experience leading to big rewards. The graphic effects are similar to the three previous productions featuring cats, puppies and rats. The latter find themselves in the middle of a toxic city in ruins. The soundtrack gives rhythm to the session and actively contributes to the immersion in the game. During the session, the player can hear beeps, voice-overs and typical industrial tones. All these elements are imbued with the recognizable chaos of the Nitro style. On the reels, several symbols are available including classic royal cards, four gang logos and four character icons.

The Super Bonus will be played on a maximum grid height.

Upon activation of the Two Ways feature, Nitropolis 4 awards payouts from right to left starting from the first and sixth reels. Collecting identical symbols on the screen results in specific rewards. The amount varies from 0.3 times the bet for card rows, 0.8 to 1 times the bet on the logo side and 1.24 to 3 times the bet for premium wins. The wild symbol is also part of the game and lands on all six reels of the grid. These wild symbols substitute for the other symbols and have the same value as the highest paying symbol in the game.

Playable on all devices, Nitropolis 4 offers a betting range of $0.20 to $50 per spin. With a high volatility, the game offers bettors big prizes of up to 50,000 times the bet. The payout rate is 94%.

Nitropolis 4 compared to all the previous versions

How the game works

Nitropolis 4 slot starts with avalanches, removing winning symbols and replacing them with new ones. An extra reel is added at the top leading to a maximum of 8 rows. The process continues until no new winning combinations occur.

During spins, 2×2 super symbols or 3×3 mega symbols are likely to appear on any spin. In addition, Nitro Reels can be positioned on two grid locations and occur on any reel. Each of these features 4, 6, 8, 10 or 12 standard pay symbols. The Big Nitro reels cover six positions in full and incorporate 2, 3, 4, 5 or 6 pay symbols in a 2×2 format.

Speaking of Nitro multipliers, they span two positions even though they count as one symbol. As usual, they multiply the total winnings and contain values of ×4, ×6, ×8, ×10 or ×12.

As for the Nitro Booster modifiers, the online slot offers players 8 possibilities each with the ability to increase the winnings on the meter. The list consists of the Redrop formula, the Random Nitro Appear, the Nitro Wild, the Nitro Match and the Nitro Upgrade which boosts the value of a Nitro reel. There is also the Max Rows feature revealing a grid of 8 rows in total and the Garbage Collect leading to the triggering of an avalanche.

Next, Nitropolis 4 has a bonus game where landing 3, 4, 5 or 6 bonus symbols awards 8, 12, 16 or 20 free spins. During the Free Spins, the Nitro reels are sticky until the feature ends. On the one hand, each win increases the security level by one to a maximum of 8 lines. When one of the triggering symbols is a Super Bonus symbol, the Super Bonus Game is triggered. On this spin, the Max Rows and Both Ways feature always remains active.

Finally, the X-iter feature is obviously available with five distinct modes. Each feature displays a specific amount of money depending on the benefits granted. Overall, the Bonus Hunt, Nitro Booster, Super Spin, Bonus and Super Bonus options cost 2×, 10×, 25×, 100× and 500× the stake respectively. The choice of the player depends on his method of approaching the game and his budget.

In conclusion, the Nitropolis 4 online slot from ELK Studios retains some of the features that have made this series so successful. Between avalanches, reel expansion, security level, Nitro Reels and modifiers, players can pocket a jackpot of up to 50,000 times the stake.