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FrançaisNitropolis 3 Slot
Nitropolis 3 is where the series stops respinning winners and starts exploding them, with every avalanche adding a row until the grid reaches 8. Big Nitro Reels, Epic 4x4 symbols and a Super Bonus played at full height fill out the game, and the cap jumps to 50,000x.
Nitropolis 3 Demo
Count the rows rather than the wins: each avalanche adds one, and the ways rise with them. In free spins, watch the safety level, because it decides how tall the next spin starts.
What changed most in this third game
Avalanches replace the old respins as the main engine. Released in April 2022, with the gangs fleeing Sergeant Nitro Wolf by blimp to a beach hideout, Nitropolis 3 opens each base spin on 4 rows and 4,096 ways. A win blows up the symbols involved, the rest fall, a new row appears at the top and fresh symbols drop in.
One base win can therefore change the shape of the board, all the way to 8 rows. Nitro Reels survive the explosions and respin instead. There is no Booster reel in this game: Nitro Wild, Nitro Match and Nitro Upgrade land as symbols on the reels, so where they land decides which Nitro Reels they touch.
Nitropolis 3 game data
| Studio | ELK Studios |
|---|---|
| Released | Apr 2022 |
| RTP | 95.0% |
| Volatility | 7 of 10 |
| Max win | 50,000x bet |
| Hit rate | 19.2% |
| Bet range | 0.20–50 EUR |
| Grid | 6×4 → 6×8 |
| Ways to win | 4,096+ |
| X-iter™ | Yes |
| Free demo | Yes |
Volatility is 7 of 10, one step below every other numbered game, and 19.2% of spins pay, a little under one in five. The 95.0% RTP is a theoretical long-run figure, and the rules screen in the game states it for your version.
How rows, ways and big symbols interact
Ways grow on two separate tracks, through more rows and through more or larger Nitro Reels. The data sheet puts the range at 4,096 up to millions without giving an exact top figure. Wins pay from the leftmost reel, the avalanche repeats while new wins appear, and the next base spin resets to 4 rows.
Wilds and paying symbols also come in Super 2x2, Mega 3x3 and Epic 4x4 sizes, each counting as the squares it covers, so a Super is worth four 1x1 symbols and an Epic sixteen. Gaps beneath big symbols and big Nitro Reels are filled with 1x1 copies of the same type.
From big Nitro Reels to the Super Bonus
Only some of these need a Nitro Reel in range to do anything.
Small and big Nitro Reels
Small Nitro Reels work as before: two positions holding 4, 6, 8, 10 or 12 copies of a 1x1 symbol. Big Nitro Reels are the new arrival, covering six positions and holding 2, 3, 4, 5 or 6 identical 2x2 symbols, so their size number cannot be compared directly with a small reel's. A small Nitro Reel can also carry a super bonus symbol. That counts as one symbol regardless of size, and the ways return once it spins out.
Nitro Match, Upgrade and Wild
These land as symbols and act before the payout, on Nitro Reels on the same reel or either neighbouring reel. Match copies a payout symbol from an adjacent reel, unless that would improve nothing. Upgrade raises the symbol count, while Wild replaces the contents with wilds. A feature symbol can then flip into a wild, and a wild landing in a feature frame can flip into a feature symbol after paying.
Both Ways and Redrop
Both features affect all reels and need no Nitro Reel. Both Ways switches on as it lands, before the payout, and stays active for the rest of the avalanche sequence. Redrop waits until wins have run out: bonus symbols, Nitro Reels and feature symbols all remain, the Nitro Reels respin and new symbols drop in, which makes it a useful route to a third bonus symbol. Any feature symbol can also flip over at random and trigger a further feature.
Free spins and the safety level
Three, four, five or six bonus symbols give 8, 12, 16 or 20 free spins, and every Nitro Reel stays for the rest of the bonus. The safety level begins at 4 rows. Each winning free spin moves it up one row after the payout, to a maximum of 8, and the next spin starts from there. An early win therefore gives every later spin a taller start. Retriggers follow the same table.
Super Bonus
A bonus trigger containing at least one super bonus symbol becomes the Super Bonus, played at 8 rows with Both Ways active. Super bonus symbols only appear in small Nitro Reels, and each one counts as a single bonus symbol however large its reel. That makes a small Nitro Reel worth a second look when two bonus symbols are already in view. A retrigger containing one also brings the Super Bonus into play.
X-iter in Nitropolis 3: five modes from 2x to 500x
Names follow the rules, though the product sheet calls the 2x mode Bonus Hunt and the 100x mode Buy Bonus.
| Mode | Cost | What it does |
|---|---|---|
| Boosted Bonus Chance | 2x | One spin with more than double the usual bonus chance. |
| Big Nitro Reel | 10x | One spin with a guaranteed big Nitro Reel. |
| Nitro Match | 25x | One spin with a guaranteed Nitro Match and Both Ways active. |
| Bonus | 100x | Guaranteed entry to the Free Spins bonus game. |
| Super Bonus | 500x | Guaranteed entry to the Super Bonus, every free spin at 8 rows with Both Ways. |
X-iter runs from the base game only and is not offered in every market.
What a €50 top bet and a 50,000x cap mean in plain terms
The stake ceiling halves compared with the first two games, from €100 to €50, while the win cap rises five times, from 10,000x to 50,000x. If you bet €50 or less, the lower ceiling changes nothing and only the cap is different: at €1 a round can reach €50,000 rather than €10,000. At €50 the cap comes to €2,500,000, the maximum exposure on the product sheet, against €1,000,000 before.
None of this makes a result that size likely. A round reaching the cap simply ends and pays what it has collected. Volatility of 7 is a notch below its sequels, yet about four spins in five still pay nothing, and the 95.0% RTP only holds over a very long run. X-iter modes have their own RTP line in the rules, so read the in-game value before comparing.
Nitropolis 3 and its neighbours
Compared with Nitropolis 2, the structure changes: avalanches for respins, on-grid features for the Booster row, and a cap five times higher at the same 95.0% RTP. Nitropolis 4 keeps the expanding grid but brings the Booster back as two screens, adds Nitro Multipliers and retires the Epic 4x4 symbol, with RTP down to 94.0% and volatility up to 8. For the simpler starting point, see the original Nitropolis.
Nitropolis 3 pros and cons
What works
- A single base spin can grow from 4 rows to 8, adding ways each time
- Lowest volatility in the series at 7 of 10, with the same 50,000x cap as its sequels
- 95.0% RTP, a full point above Nitropolis 4 and 5
- The safety level keeps rows earned during free spins
What to watch
- Green features need a Nitro Reel nearby, so some land with little effect
- With flips, frames and big symbols, it can take a while to see what actually paid
- The top stake stops at €50, half the limit of the first two games
Should you play Nitropolis 3?
Nitropolis 3 suits players who like cascades and a growing board, and who want the 50,000x cap with volatility a notch below its sequels. It also gives the clearest look at big Nitro Reels before multipliers and Booster screens pile on top. Skip it if you want Nitro Multipliers, or if you normally stake above €50, which this game will not take.
Nitropolis 3 questions answered
What is the RTP of Nitropolis 3?
It is published at 95.0%, a theoretical average across a huge number of rounds.
What is the Nitropolis 3 max win?
Total wins in a game round are capped at 50,000x the placed bet, or €2,500,000 at the €50 top stake. It is a limit, not a target.
Can you play Nitropolis 3 for free?
Yes, the demo on this page is free and uses play credits.
How do you trigger the bonus and the Super Bonus?
Three or more bonus symbols start 8 to 20 free spins. If one is a super bonus symbol, found only in small Nitro Reels, the Super Bonus starts instead.
Does Nitropolis 3 have a Nitro Booster?
No Booster appears in its rules or sheets. Nitro features land as symbols on the reels, and the Booster returns in Nitropolis 4.
