Nitropolis 4 : Free Play & Review

The guys are back in action with the Nitropolis 4 demo, readier than ever to prove their incredible tenacity, this time in their quest to extract some Nitro! In typical fashion for this series, Nitropolis 4 free play displays breathtaking complexity and remarkable ways of entertainment! Showcasing 6 reels and 4 starting rows, this game has expansive reels that can raise the number of rows to 8, forming 4096 base paylines that can turn into millions of winning ways! Check out this review about the ELK Studios creation to uncover its details!

Theme and Design

The game theme once again revolves around a set of animals and their never-ending tenacity, this time taking over an offshore oil rig and drilling! The general atmosphere retains the cyberpunk roots that led this franchise to fame, featuring wiring and robotic sounds.

Serving as the background is a point of view similar to the aerials you would encounter with oil rigs, with a foggy (or, rather, smoggy) atmosphere and a lot of exposed metal. You can generally discover one overarching element, namely a collection of fantastic metal superstructures, serving their purpose of setting up an oil-extracting operation.

Most of the present structures enumerate towers, cranes and oil tanks, creating a complex backdrop ready to immerse you into this dystopian vibe. Aside from the distant setting, the closer parts form a control panel, ready to operate any complex machine, featuring buttons, levers, pressure gauges, screens, and many exposed pipes. The funniest detail, however, is the ‘Eat, sleep, drill, repeat’ mug, which perfectly encapsulates the general atmosphere in this slot machine.

Apart from these details, this game also features exposed wiring and two holographic screens above the grid, responsible for displaying real-time information during crucial moments.

The colour palette is absolutely impressive, employing a beautiful combination of grey, sea green and salmon pink to create an understated setting without making it feel dull. As for the grid, it highlights much more intense colours, including various shades of blue, red, green, and purple, using a fantastic palette with a wide variety of nuances.

The animations are another impressive part appearing in this slot machine, considering they illustrate the complex winning system, thus becoming outright fantastic. They work complementary with this soundtrack, employing a tune emphasising synthesisers and various briefing phrases delivered in a robotic voice.

Nitropolis 4 Free Play Mobile Slot

Join the drilling operation from any handheld device by starting the mobile version for this slot! Using HTML5 and Flash technology, you can enjoy the game by simply starting in your preferred browser!

Technical Features

Wager limits

The betting opportunities aren’t as extensive as the experienced players or high rollers might like, only featuring a range between 0.20 and 50 credits; however, the many winning opportunities and bonus features make up for it, leading to tremendous rewards.

Bonus Features

Regular Nitro Reels contain 4, 6, 8, 10 or 12 symbols with a 1x1 payout, whereas the Big Nitro Reels have double the size.

The Nitro Multiplier covers two symbols with an arbitrary multiplication count, increasing all wins in view.

The Nitro Booster adds different features to the game, increasing the bonus capacity for all reels:

• Redrop: all nitro reels, wilds, multipliers, and bonus symbols remain on the grid while the regular symbols disappear and these reels re-spin.
• Both Ways: winnings pay in both directions instead of adopting only one.
• Max Rows: the slot expands the reels to a maximum of 8 rows.
• Garbage Collect: the system chooses symbols according to chance and removes them.
• Nitro Appear: A nitro reel replaces existing symbols during ongoing spins.
• Nitro Wild: a nitro reel filled with Wild symbols.
• Nitro Upgrade: the game upgrades the nitro reel and adds additional symbols.
• Nitro Match: a symbol in view matches with a nitro reel and fills it.

The Bonus Game has two tiers:

• Bonus Game: the activation process involves between 3 and 6 Scatters (3 gives 8 spins, 4 awards 12, 5 offers 16, and 6 rewards with 20).
• Super Bonus: it starts when pairing regular Scatters with the Super Bonus Scatter, launching the round under the same conditions and featuring Max Rows and Both Ways.

Each bonus characteristic has a specialised announcer, heralding it on the screens above the grid.

RTP & Volatility

The volatility level reaches the high mark, definitely accentuating this game’s priority: huge wins! Nitropolis 4 RTP reaches 94%, below the industry average of 96% and the usual 95% from the previous games.

SlotsCalendar tips: be mindful when choosing your bet in high-volatility games, considering they have the potential to quickly drain a budget until landing a big win.

Symbols

A slot machine of such complexity will undoubtedly feature a wide symbol variety. This one is no exception, also featuring changes in size and importance, as stated in another section of this Nitropolis 4 slot review.

Regular symbols have 3 tiers:

• The lower paying royals being sprayed letter on metal sheets: A, K, Q, J.
• Insignias: ‘Dirty Dawgs’, ‘Gritty Kitty’, ‘Pug Thugs’, ‘Rogue Rats’.
• A quartet of animals acting as the leaders of the factions mentioned above: the dog, the cat, the pug and the rat.

The special symbols include a substituting Wild, illustrating a sea mine, a bonus symbol, picturing a small submarine and offering free spins, and a multiplier, a liquid container.

How to play Nitropolis 4

Before going into detail about interacting with this game interface, we have to go into detail about two core principles in Nitropolis 4 free play:

• Avalanche: all symbols taking part in a win will eventually leave space for other elements to replace them, each of these occurrences leading to an additional row.
• Big Symbols: these elements have no particular requirements to land; they come in 2x2 or 3x3 forms and facilitate more efficient winning combinations.

The slot machine has a function in each corner of the screen:

• Upper left: comes with the menu button, offering the paytable, general rules and information, and an opportunity to enter a promo code.
• Lower left: offers the betting modifier, allowing the player to choose among various pre-set wagers.
• Upper right: the autoplay option, offering between 10 and 100 automated spins.
• Lower right: this is the spin button, whose prolonged pressing has the same function as the auto-spin.

SlotsCalendar tips: more than ever, we recommend inspecting the paytable and the rules before starting the gameplay, considering this game has many details.

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Nitropolis 4 Free Spins and Bonus Offers

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Nitropolis 4 Compared to Other Nitropolis Slots

SlotsCalendar Verdict

Hits

• amazing variety of bonus features
• outstanding graphics
• huge payout potential

Misses

• may be too complex for some players