Real screenshot from our demo test, 28 Oct 2026
Relax GamingReleased 29 Oct 2026
Nuclear Tumble Demo & review
A 6x6 Relax Gaming tumble slot where cash prizes pay only once they dig down to the bottom row, with a Meltdown that clears the grid to coins.
Written by Hampus GravePublished 28 Oct 2026
Play money · no sign-up · no deposit
- RTP
- 96.1%
- Volatility
- Medium-High
- Max win
- 5,000x
- Grid
- 6x6
Play Nuclear Tumble for real at YEET
FluxPlays verdict
Our verdict
No, unless you plan to use the Supercharge menu. Nuclear Tumble's base game spends most spins breaking stone blocks for small cash prizes, while its best ideas, a Meltdown that clears the grid to coins and free spins whose coin values climb, mostly sit behind a price. Even for buyers the choice is crowded: ten Supercharge options, and the rules print an RTP for none of them.
Who it suits
Play this if…
- Bonus buyers who like choice: ten Supercharge options set how gold the coins and how long the round
- You enjoy a gamble decision: every free-spins award can be risked for more spins and higher coins
- Learners curious about blockers: base spins show how wins, bombs and blocks open the way for coins
Skip this if…
- Short-session players: only 20 of our base spins paid, and line wins are tiny
- Max-win hunters on a budget: the biggest coin values sit behind the Golden buys
- Bonus chasers who will not buy: free spins and the Meltdown never arrived in our base spins
Where to play Nuclear Tumble
Nuclear Tumble is available at these casinos we have tested and reviewed. How we test casinos
YEET
18+ · T&Cs apply
SafeCasino
FluxPlays score 7.5
Skrill withdrawal paid out in 18 hours in our test
400% up to €4,000 + 1,200 free spins
- 40x wagering
- min deposit €10
- 30 days
400% welcome package up to 4,000 over four deposits, each 100% up to 1,000 plus 300 free spins. 40x wagering on bonus and free spin winnings. Minimum 10 to activate, 200 for the full 300 spins. 30 day validity. Free spins run on Pragmatic Play games.
18+ · T&Cs apply · Offer checked 7 Oct 2026
Betlabel
FluxPlays score 7.0
E-wallet payout inside 24 hours in our test
200% up to €1,500 + 150 free spins
- 35x wagering
- min deposit €10
- 7 days
200% welcome package up to 1,500 plus 150 free spins over four deposits: 100% up to 300 + 30 FS, 50% up to 350 + 35 FS, 25% up to 400 + 40 FS, 25% up to 450 + 45 FS. 35x wagering, 7 day window. Minimum 10 first deposit, 15 thereafter. Crypto deposits are not bonus eligible.
18+ · T&Cs apply · Offer checked 7 Oct 2026
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Nuclear Tumble: Full Review
In Nuclear Tumble a cash prize pays only once it digs its way to the bottom of the grid, so every tumble is about breaking the stone blocks underneath. Relax Gaming releases it at the end of October 2026, made with CasinoGrounds, and we tested the pre-release fun-mode demo a day early. It suits bonus buyers who enjoy a long menu more than players who want ordinary spins to pay.
Nuclear Tumble game information
- Provider
- Relax Gaming
- Release date
- 29 October 2026
- Grid
- 6 x 6 (reels x rows)
- How it pays
- 46,656 ways
- RTP
- 96.10%
- Volatility
- Medium-High
- Max win
- 5,000x the bet
- Bet range
- $0.20 to $200
- Buys and modes
- 6 buys, 5 paid modes, see the table
How Nuclear Tumble works
Wins pay on 46,656 ways: matching symbols on three or more adjacent reels from the leftmost, with several of one symbol on a reel multiplying the win. The Wild lands on reels 2 to 6. Line pays are small, and the bear on top pays its bet back only with six reels of him.
| Symbol | 6 / 5 / 4 / 3 of a kind at $1 |
|---|---|
| Bear | $1.00 / $0.70 / $0.30 / $0.20 |
| Next highest | $0.60 / $0.35 / $0.25 / $0.15 |
| Fruit and card symbols | $0.20 to $0.40 / $0.15 to $0.25 / $0.10 to $0.20 / $0.05 to $0.10 |
The blocks are the real game. How it fits together:
- Up to 25 stone blocks start on the grid. Each win destroys its symbols and the blocks touching them, and the grid tumbles until nothing more wins.
- A destroyed block can reveal a cash prize, a bomb or one of three Free Spins scatters.
- A bomb clears every non-cash symbol in its row and column once the wins stop.
- A cash prize pays when it reaches the bottom of the grid with the blocks beneath it gone.
- Clearing every blocker position sets off a Meltdown, which strips the grid to its coins and drops a fresh one rich in cash prizes.
Free spins carry the game, with the Meltdown as the moment that can turn a single spin.
The grid before our first spin, at the demo's default 2.00 bet before we lowered it to 1.00. FluxPlays demo test, 28 October 2026.
The rules page on cash prizes, which pay once they reach the bottom of the grid. FluxPlays demo test, 28 October 2026.
Free spins and the coin ladder
Three or more Free Spins scatters start the round, and a Super or Ultra scatter among them upgrades it. Normal free spins last six spins, Super eight at coin level 2 and Ultra ten at coin level 3.
Inside the round every collected cash prize moves a meter, and each set of four adds a spin and raises the coin values. Coins come in bronze, silver and gold, and the levels lift all three:
| Coin | Level 0 | Level 4 and up |
|---|---|---|
| Bronze | 1x to 5x | 7x to 20x |
| Silver | 5x to 20x | 30x to 100x |
| Gold | 20x to 100x | 200x to 2,500x |
A block hiding an extra free spin adds one more when it breaks.
The gamble before every round
Before any free spins start, the game offers to gamble the award for the level above, again and again up to Ultra, and a loss ends with nothing. No odds are printed. We declined every time, so the outcome is described here only from the screen.
The choice before every free-spins round: START 8 spins at coin level 2, or GAMBLE for 10 at level 3. FluxPlays demo test, 28 October 2026.
Supercharge buys and modes: prices and what you get
All of these sit in one Supercharge menu. Six are bought once and start free spins, while the five modes charge on every spin until you switch them off.
Buys and paid modes
Prices at a $1 bet, with our test result
Free Spins
$50
Bonus buy
6 free spins at coin level 1
Our testOne round: $12.35 back ($50 in)
Super Free Spins
$100
Bonus buy
8 free spins at coin level 2
Our testOne round: $27.70 back ($100 in)
Ultra Free Spins
$200
Bonus buy
10 free spins at coin level 3
Our testOne round: $175.20 back ($200 in)
Golden Free Spins
$400
Bonus buy
Free Spins with only gold cash prizes
Our testOne round: $26.30 back ($400 in)
Golden Super Free Spins
$750
Bonus buy
Super Free Spins with only boosted gold cash prizes
Our testOne round: $1,022.10 back ($750 in)
Golden Ultra Free Spins
$1,500
Bonus buy
Ultra Free Spins with only further boosted gold cash prizes
Our testOne round: $198.45 back ($1,500 in)
Golden Meltdown
$175 a spin
Paid mode, per spin
A Meltdown every spin, with only gold cash prizes
Our test10 spins: $959 back ($1,750 in)
Meltdown Mode
$30 a spin
Paid mode, per spin
A Meltdown cascade every spin
Our test10 spins: $239.30 back ($300 in)
Golden Spins
$15 a spin
Paid mode, per spin
Every cash prize lands gold
Our test10 spins: $41.90 back ($150 in)
Bonus Reels
$10 a spin
Paid mode, per spin
Only Free Spins symbols and blanks land
Our test10 spins: $58.60 back ($100 in)
Enhanced Bet
$2 a spin
Paid mode, per spin · RTP 96.10%
A higher chance of Free Spins and the Meltdown
Our test10 spins: $2.30 back ($20 in)
| Option | Price at $1 | Official RTP | What you get | Our test |
|---|---|---|---|---|
| Free SpinsBonus buy | $50 | 6 free spins at coin level 1 | One round: $12.35 back$50 in | |
| Super Free SpinsBonus buy | $100 | 8 free spins at coin level 2 | One round: $27.70 back$100 in | |
| Ultra Free SpinsBonus buy | $200 | 10 free spins at coin level 3 | One round: $175.20 back$200 in | |
| Golden Free SpinsBonus buy | $400 | Free Spins with only gold cash prizes | One round: $26.30 back$400 in | |
| Golden Super Free SpinsBonus buy | $750 | Super Free Spins with only boosted gold cash prizes | One round: $1,022.10 back$750 in | |
| Golden Ultra Free SpinsBonus buy | $1,500 | Ultra Free Spins with only further boosted gold cash prizes | One round: $198.45 back$1,500 in | |
| Golden MeltdownPaid mode, per spin | $175 a spin | A Meltdown every spin, with only gold cash prizes | 10 spins: $959 back$1,750 in | |
| Meltdown ModePaid mode, per spin | $30 a spin | A Meltdown cascade every spin | 10 spins: $239.30 back$300 in | |
| Golden SpinsPaid mode, per spin | $15 a spin | Every cash prize lands gold | 10 spins: $41.90 back$150 in | |
| Bonus ReelsPaid mode, per spin | $10 a spin | Only Free Spins symbols and blanks land | 10 spins: $58.60 back$100 in | |
| Enhanced BetPaid mode, per spin | $2 a spin | 96.10% | A higher chance of Free Spins and the Meltdown | 10 spins: $2.30 back$20 in |
A blank cell is a figure the game's rules do not give.
The rules print an RTP only for the base game and Enhanced Bet. The Golden versions replace every cash prize with gold, which is where the big coin values live.
Part of the Supercharge list at a 1.00 bet: Free Spins 50, Meltdown 30, Gold Coins 15 and Bonus Reels 10. FluxPlays demo test, 28 October 2026.
RTP, volatility and max win
The base game returns 96.10% by the rules, and Relax lists four lower-return versions under their own game IDs. The rules carry no volatility label, and the one review site rating it so far calls it medium-high. Nothing pays past 5,000x the bet: a round that reaches it stops and pays the cap.
Our Nuclear Tumble demo test
FluxPlays demo test
28 October 2026, demo running 96.10% RTP
Base game spins
100
at $1 per spin
Staked
$100
Paid back
$33.95
34% of stake, -$66.05
Winning spins
20 of 100
20% of spins paid something
Biggest win
$7 (7x)
the best base spin; no natural Free Spins or Meltdown in 100 spins
Free spins triggered
0
natural triggers in the session
Played on Relax Gaming's public fun-mode client (build 1.0.2, rules dated 24 September 2026) on 28 October 2026, a day before release, in FUN credits read as dollars, from a 5,000 balance. The demo opened at 2.00 and was lowered to 1.00 for every round; buys and modes are priced from that base. Every Free Spins gamble was declined. Every round was checked against the game server, and the session ends at 2,377.15 on the server and on screen: $5,420.00 staked over 156 paid rounds, $2,797.15 returned. The rules give an RTP for the base game and Enhanced Bet only. Re-check the facts against the live game on release day.
The base game was mostly digging. Bombs went off in 36 base rounds, yet only 20 paid, cash prizes reached the bottom on ten of them, and neither free spins nor a Meltdown came on their own.
The paid side swung hard. Golden Super Free Spins landed 60x gold coins again and again as the ladder climbed, and paid $1,022.10. Golden Free Spins, at more than half that price, paid $26.30.
Meltdown Mode was the steadiest option, paying on nine of its ten spins. Bonus Reels reached Super Free Spins once in ten tries. A session this size cannot measure the return, and each buy here is one round.
End of our bought Golden Super Free Spins at 750: TOTAL WIN 1,022.10. FluxPlays demo test, 28 October 2026.
End of our bought Ultra Free Spins at 200, with a Meltdown midway: TOTAL WIN 175.20. FluxPlays demo test, 28 October 2026.
Is Nuclear Tumble worth playing?
Not for the base game, but the Meltdown modes earn a look. A grid that strips down to its coins is the most distinctive thing here, and Meltdown Mode puts it on every spin for a fraction of the free-spins prices. Spinning normally, you mostly watch blocks break.
Propaganda 2 also sells a menu of buys around a tumbling grid. Pick Propaganda 2 for one multiplier that keeps climbing through its bonus and five clear options. Pick Nuclear Tumble if you prefer collecting coins and want to choose how gold they are.
In the demo, start with Meltdown Mode before any Golden buy. It shows the coin grid ten times for less than one Golden Free Spins round.
Frequently Asked Questions
How do cash prizes work in Nuclear Tumble?+
A cash prize pays only when it reaches the bottom of the grid, so the stone blocks beneath it have to be cleared first by wins next to them or by bombs. Coins come in bronze, silver and gold, and gold carries the biggest values. In free spins every four collected prizes add a spin and raise the coin values.
What is the Meltdown in Nuclear Tumble?+
Clearing every blocker position triggers it at the end of the cascade. Everything except cash prizes is removed, and a fresh grid drops with a higher chance of more and bigger coins. Meltdown Mode and Golden Meltdown sell it on every spin, and Enhanced Bet makes it more likely.
Should you gamble the free spins in Nuclear Tumble?+
The game offers it before every free-spins round: risk the award for the level above, with more spins and higher coin values, repeatedly up to Ultra. A loss ends the round with nothing. We always declined, so we cannot say how often it lands, and the rules give no odds for it.
What is the max win in Nuclear Tumble, and how is it reached?+
Wins are capped at 5,000x the bet, and a round that reaches it ends there. Gold coins are the route: at the top coin level they are worth 200x to 2,500x each, so a Golden Ultra round or a Golden Meltdown that lands several can get close.
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