Nitropolis 5 Slot Demo: Not Available Here

Nitropolis 5: reels and the battle meter

Nitropolis 5 combines an expanding six-reel field with Nitro Reels, Nitro multipliers and a separate Boss Battle. The starting grid has four rows; smaller reels inside it can add symbols or modifiers. The main-game screenshot also shows the battle meter, which belongs to a different feature from the ordinary reel combinations.

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Sticky Nitro Reels and Holding Cells

Three bonus symbols activate free spins with sticky Nitro Reels. A Super Bonus symbol upgrades the entry to the maximum field size, Both Ways and NPD Holding Cells. When the selected NPD symbol forms part of a win, it locks in place while respins try to add to that result. Expansion and holding symbols therefore affect the following spins as well as the immediate screen.

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What changes in the Boss Battle

Collecting three Boss coins through Nitro Booster opens the Boss Battle. The studio image shows its separate arena and ammunition counter. Nitro Booster has several possible modifiers, so reaching a bonus screen does not imply that every listed enhancement is active. Read the displayed mode and modifiers together when comparing a base-game spin, free spins and the battle.

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Official game description checked 2026-10-09. The in-game rules govern the version you open.