A radioactive farm, a board of breakable blocks and cash prizes that must tumble all the way down: Nuclear Tumble gives cascading reels a clear collection objective.
Nuclear Tumble is a Relax Gaming release created with CasinoGrounds, launched on 29 October 2026. A muscular bear tends oversized produce in a wrecked town, with a luminous green haze suggesting that the fertiliser was not entirely natural. The comic artwork carries a game built around changing the board.
The starting point is a six-by-six grid with 46,656 advertised ways. Stone blocks occupy part of that space, so a win matters for more than its payout. It can remove nearby obstacles, uncover something beneath them and create room for symbols to fall. Cash collection provides a second result to follow.
Clearing space and moving prizes are closely connected. A cash value sitting high in the grid pays only after reaching the bottom. Clearing every block activates Meltdown, while coloured scatters open three Free Spins tiers. These linked systems give the radioactive theme a concrete role in the game.
The base-game sequence is easiest to understand as three connected changes to the same grid.
A spin produces a grid containing symbols and stone blocks. A winning result also breaks blocks touching that win, so the payout and the newly opened space are related parts of one event.
Symbols refill the gaps. Blocks can reveal cash symbols, bombs or scatters, and cash values move through the grid. Reaching the bottom is the collection condition; simply appearing on screen is not enough.
Removing all blocks starts Meltdown. Collecting three scatters leads to Free Spins, with their colours determining the tier. These conditions describe different feature routes, even though both grow out of activity on the same board.
The 6×6 format is a useful anchor when the screen becomes busy. Its advertised 46,656 ways describes the reel structure, not separate wagers or a promise of frequent wins. Cascades keep the sequence developing as gaps refill, changing the arrangement after the initial result.
Up to 25 stone blocks can appear before a spin. Wins destroy touching blocks, and some conceal additional symbols. An opening can therefore change where later symbols fall and reveal another event. The published explanation also identifies bombs among those concealed objects.
Cash symbols are distinct from ordinary matching symbols. Their displayed value becomes a collected prize only at the bottom row. That positional condition explains why cash can remain unresolved while a cascade develops. Its location matters to understanding the animation as much as the value printed on it.
When the final stone block is removed, Meltdown clears every non-cash symbol and supplies a fresh grid. Cash symbols are retained, and the replacement drop has an increased chance of additional and higher cash values. It is a change in the state of the game, not an automatic award of the maximum prize; the new arrangement still has to resolve.
During Free Spins, every four collected cash symbols award an additional spin and increase cash values. The mechanism links extension and progression to the same collection count. It also makes the initial six, eight or ten spins starting allocations rather than fixed final lengths. Values visible on the grid and values already collected should not be treated as the same thing.
Golden modes remove lower cash prizes from the available selection and use different prices. CasinoGrounds lists Golden Spins at 15× the base bet, Golden Meltdown at 175×, and Golden Free Spins at 400×, 750× or 1,500× for the three tiers. These are distinct paid configurations with a shared 5,000× cap; a higher entry price does not turn that cap into a larger one.
Three collected scatters trigger Free Spins. Their colour establishes the starting tier, with red taking precedence when yellow and red both appear. The shared cash-collection progression continues within the feature.
Three scatters with the green, standard outcome.
The standard round starts with six spins. Every four collected cash symbols add a spin and raise cash values. The opening count describes the beginning of the feature, not a guaranteed payout or its fixed final length.
The qualifying scatter set includes yellow and no overriding red.
Super begins with eight spins. It is a tier of the same feature family rather than a separate matching game. The additional starting spins and the continuing collection system are the verified distinctions when comparing it with the standard round.
The qualifying scatter set includes red.
Ultra begins with ten spins and takes priority if yellow is also present. It still operates within the stated maximum. The longer starting allocation changes the opening state, while the eventual sequence and payout remain variable.
CasinoGrounds, the game's development partner, publishes 96.10% RTP for the default game. It separately lists 96.10% for Golden Spins and 96.50% for the purchases discussed in its Golden-mode section. These figures describe configurations over a very large number of outcomes; they are not percentages that a particular session must return.
The same primary source describes volatility as medium, at six out of ten, and gives a maximum win of 5,000× the base bet. Volatility, theoretical return and the maximum answer different questions. None states how long a particular balance will last, and the maximum should not be read as a typical feature result.
Relax Gaming lists alternative game identifiers for several configurations. Consequently, a review's default RTP cannot establish the setting delivered by every operator. The specific game's information panel remains the place to identify that version. Mode prices are also multiples of the base bet, which should be distinguished from the amount paid to enter a purchased feature.
Nuclear Tumble — Game screen · Relax Gaming × CasinoGrounds
Every cleared block can open a route through the Nuclear Tumble grid. Wins remove nearby obstacles, symbols fall into the available space and cash values move towards the bottom. Follow the prize itself: its position changes as the board develops, and collection happens when it reaches the bottom of the field.
Free Spins adds another layer to that journey. Green, yellow and red scatter groups select the bonus tier, while the collection meter tracks cash prizes during the round. Clearing all stone blocks starts Meltdown. These connected features give the game a strong progression from opening space to revealing and collecting what is inside.
Relax Gaming developed it in collaboration with CasinoGrounds. Both the provider's game page and its release announcement identify the partnership.
The published launch date is 29 October 2026. It was already released at the time of this review's 12 November 2026 source check.
There are six reels and six rows, with 46,656 advertised ways. Stone blocks occupy part of the board during the clearing sequence.
No. The cash symbol must reach the bottom row before its value is collected. Its appearance higher in the grid is only an intermediate state.
Removing all stone blocks triggers it. Non-cash symbols disappear, existing cash symbols remain, and a fresh grid arrives with enhanced cash-symbol potential.
Three scatters trigger the feature. Green gives six initial spins, yellow raises the tier to eight, and red gives ten with priority over yellow.
Yes. Every four collected cash symbols add a spin and increase cash values. The extension depends on collected symbols, not merely visible ones.
No universal claim is justified. It is the published default figure; the provider lists other configurations, and the coproducer gives separate figures for certain modes.
Game facts and original images are documented in the references below. Illustrations are marked separately.
Five distinctive systems. Compare their visual worlds, game structure and individual mechanics.
Two focused guides and a complete FAQ. Go straight to the detail you want to understand.
Follow Nuclear Tumble from its main game into the features. The sequence, named symbols and activation rules are explained together, with a comparison of the bonus modes.
Read the guide02 / GuidesRead the published figures for Nuclear Tumble in context. RTP, volatility, hit frequency and maximum win answer different questions; this guide shows how to compare them without mixing them together.
Read the guide03 / FAQClear answers about Nuclear Tumble, grouped by topic. Open an individual question or expand the full guide.
Complete FAQ