Nuclear Tumble · How the game unfolds
The base-game sequence is easiest to understand as three connected changes to the same grid.
- 01
Resolve the symbol win
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.
- 02
Follow the falling prizes
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.
- 03
Check the next feature
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.
Nuclear Tumble · Game features
A ways game with moving space
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.
Stone blocks are part of the outcome
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 values need a route to the bottom
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.
Meltdown changes the board
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.
A closer look
The bonus collection meter
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 variants in Supercharge
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.
Nuclear Tumble · Bonuses & rewards
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.
| Bonus mode | Activation | How the feature develops |
|---|---|---|
| Free Spins | 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. |
| Super Free Spins | 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. |
| Ultra Free Spins | 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. |
Cash collection, Meltdown & Free Spins
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.
- Meltdown
- Free Spins / Super Free Spins / Ultra Free Spins
- Supercharge
Useful terms
- Tumble
- A cascade in which symbols drop into spaces created during the current sequence.
- Stone block
- An obstacle that can break beside a win and may conceal a special symbol.
- Cash symbol
- A displayed prize value collected only after the symbol reaches the bottom row.
- Meltdown
- The board-refresh feature activated by removing every stone block, while retaining cash symbols.
- Supercharge
- The menu containing alternative modes, including the separately priced Golden configurations.
