Nitropolis 3

Nitropolis 3 Slot Logo

Nitropolis 3 by ELK Studios is a 6-reel and 4,096-ways-to-win slot with an animal theme.

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Nitropolis 3 Game Overview

Betting requirements in Nitropolis 3 range from £0.20 to £4 per spin.

Winning combinations occur when 3 to 6 matching symbols land across adjacent reels from left to right.

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Wild Symbol

The toxic drink is the slot’s wild symbol. It can substitute for any symbol except the bonus, super bonus, pay both ways, re-drop and the Nitro feature symbols.

Avalanche Feature

This feature removes the winning symbols from the grid and replaces them with new symbols. 

In addition, a new row appears - the grid can reach up to 8 rows high.

Nitro Reels

Nitro Reels can occupy two symbol positions where 4, 6, 8, 10, or 12 instances of a matching symbol appear. You can also get Big Nitro Reels covering up to 6 symbol positions which count as 2, 3, 4, 5, or 6 large 2x2-sized symbols. If Nitro Reels feature in winning combinations, they re-spin.

Special Symbols

Special symbols can land on any position and trigger extras. These symbols include:

  • Re-drop: Bonus symbols and Nitro feature symbols lock in place for a re-drop while the Nitro Reels re-spin.
  • Both Ways: All the wins payout from the left and from the right.
  • Nitro Match: All the Nitro Reels on the same or adjacent reels as this symbol display matching symbols.
  • Nitro Upgrade: Nitro Reels on the same or adjacent reels as this symbol undergo a symbol upgrade, adding additional symbols to the Nitro Reels.
  • Nitro Wild: Wild symbols replace all symbols in the Nitro Reels on the same or adjacent reels as this symbol.

Free Spins Feature

If 3, 4, 5, or 6 Zeppelin scatters land, they trigger 8, 12, 16, or 20 Free Spins, respectively. All the Nitro Reels remain sticky for the entire feature. In addition, the grid gains an extra row after every winning spin.

If at least one Super Bonus symbol triggers the Free Spins round, you activate the Super Bonus Game. It starts with 8 rows, where the Both Ways engine is active. 

Lastly, you can re-trigger the Free Spins round by landing 3 or more scatter symbols during the feature.

Nitropolis 3 RTP

Return To Player (RTP): 95%

The RTP is a theoretical value and is shown as a percentage. It’s used to describe the percentage of money wagered a particular casino game may pay back to players over a certain period of time.

For example, if a game had a RTP of 92%, in theory, this would mean that for every £100 wagered, the game could return £92 back to players in potential winnings. However, it is important to note that winnings are completely random, and players are not guaranteed to receive this.


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*All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time.