Nuclear Tumble · At a glance
Checked on 12 November 2026 against Relax Gaming materials and the coproducer's details. This review covers the released game; availability and configuration can differ between implementations.
| Published figure | Value or configuration |
|---|---|
| Developer | Relax Gaming × CasinoGrounds |
| Playing field | 6 reels × 6 rows · 46,656 ways |
| Published RTP | 96.10% published default; other configurations exist |
| Maximum payout | 5,000× the base bet |
| General release | 29 October 2026 |
| Volatility | Medium · 6/10, according to the coproducer |
| Hit frequency | About 1 in 5 spins pays something (coproducer estimate) |
| Win system | Ways video slot with cascades and cash collection |
Nuclear Tumble · Published RTP
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.
RTP & game numbers
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.
- 01
Keep the configuration attached
Write the figure together with the game edition and its source. If a developer lists more than one RTP, the range describes different configurations; it is not a meter that rises while you play. The information in the exact installed game identifies its selected configuration.
- 02
Use the correct denominator
A percentage, a multiplier and a frequency measure different things. RTP refers to aggregate stakes, a maximum-win multiplier refers to the stated bet, and hit frequency counts qualifying paying events. A feature counter is a game-state value, not another expression of RTP.
- 03
Read a ceiling as a ceiling
A maximum describes the upper boundary of the rules. It does not provide the probability of reaching that result. Likewise, a published hit frequency does not state how often a bonus appears or how often a session finishes ahead. Separate each definition before comparing games.
A simple way to read a multiplier
A 100× prize means 100 times the bet used by the rule. At an illustrative 1-unit bet, that is 100 units; at 0.20 units, it is 20 units. This example explains the notation only. It is not a forecast, a current offer or a statement that every feature uses the same bet basis.
Useful terms
- Is RTP the result I should expect from one session?
- RTP describes a theoretical long-run relationship between aggregate stakes and returns for a defined game configuration. It is not the result promised for a session and does not predict the next round. Read it with the exact game version instead of treating it as a short-term target.
- How are volatility and hit frequency different?
- Volatility describes the distribution and variation of outcomes. Hit frequency describes how often the model records a qualifying paying event. A paying event can return less than its stake. Neither figure alone specifies the frequency of a particular bonus or the probability of reaching the game’s maximum.
- Is a maximum win the same as a progressive jackpot?
- A maximum win is a ceiling defined by a game’s rules, often expressed as a multiple of a bet. A progressive jackpot is a separate prize system whose value can accumulate according to its rules. A fixed named prize, such as Mini or Grand, is not automatically progressive.
- Is an in-game bonus the same as a casino promotion?
- No. An in-game bonus is a feature governed by the slot’s own rules, such as free spins or a collection round. A casino promotion is an account-level offer with its own eligibility and conditions. The same phrase can appear in both contexts, but the activation rules and rewards are separate.
Nuclear Tumble · Game features
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.
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.
- Six reels and six rows support cascades, breakable stone blocks and bottom-row cash collection.
- Meltdown follows a fully cleared board; three scatter colours distinguish the Free Spins tiers.
- The published default RTP is 96.10%, with a 5,000× maximum and separate configurations and mode figures.
