Nuclear Tumble Slot Review

About the Game

Nuclear Tumble is a slot game from Relax Gaming featuring a 6×6 grid and 46,656 ways to form winning combinations.
Winning combinations and payouts are determined according to the paytable. A win is awarded when matching symbols land on three or more adjacent reels (starting from the leftmost reel), regardless of their vertical position.

Only the longest winning combination for each symbol is paid out. Multiple instances of the same symbol on a single reel increase the payout (a multiplier effect applies).

Wild symbols substitute for all regular paying symbols. Wild symbols can appear on reels 2, 3, 4, 5, and 6. At the start of each spin, up to 25 stone blocks are present on the grid.

Buy Bonus

The buy feature can only be activated during the base game.
This feature triggers a free spins session of one of three types: Regular, Super, or Ultra.

The cost of the buy feature is 50x, 100x, and 200x the regular bet for Regular, Super, and Ultra free spins, respectively.
The theoretical Return to Player (RTP) for the buy feature is 96.50% (for all three types: Regular, Super, and Ultra).
The cost of the Golden Buy feature is 400x, 750x, and 1500x the regular bet for Golden, Golden Super, and Golden Ultra free spins, respectively.
The theoretical Return to Player (RTP) for the Golden Buy feature is 96.50% (for all three types: Golden, Golden Super, and Golden Ultra).
When Golden free spins are activated, the Gamble feature is disabled.

Golden Spins

The Golden Spins mode launches a game variant that excludes lower-value payouts.
The bet amount for Golden Spins is 15 times the standard bet.
The theoretical Return to Player (RTP) for Golden Spins is 96.10%.

Meltdown Mode

The Meltdown betting mode triggers a spin that proceeds directly to the Meltdown feature.
The bet amount for Meltdown mode is 30 times or 175 times the standard bet (for Meltdown and Golden Meltdown, respectively).
The theoretical Return to Player (RTP) for Meltdown and Golden Meltdown modes is 96.50%.

Enhanced

When using Enhanced Bet mode, the game is played with an increased probability of triggering free spins and Meltdown Mode.
The theoretical Return to Player (RTP) for Enhanced Bet mode is 96.10%.
The bet in Enhanced Bet mode is double the standard bet.

Bonus Reels

In Bonus Reels mode, all paying symbols are removed; only free spin symbols and empty spaces can land on the reels, increasing the likelihood of triggering free spins.
The theoretical Return to Player (RTP) for Bonus Reels mode is 96.10%.
Bonus Reels mode is played at a stake 10 times higher than the standard bet.

Max Win

Win up to 5,000 times your bet in Nuclear Tumble! If the sum of all values ​​reaches 5,000x or more, the round ends, and the player receives a payout of 5,000 times the bet.

Game Rules

All winning symbols, as well as any stone blocks immediately adjacent to them (left, right, above, or below), are destroyed; the remaining symbols drop down, and new ones fill the empty spaces, creating additional winning opportunities. This process repeats until no further winning combinations are formed.

Exploding bomb

Destroying stone blocks may reveal a coin symbol, an exploding bomb, or one of the three scatter symbols.
Exploding bomb symbols destroy all non-winning symbols in the same row and column (they activate when no more winning combinations are being formed).

Cash Prize

Cash prize symbols award a win if they reach the bottom of the game grid; they are then removed from play.
Cash prize symbols destroy any stone blocks located directly beneath them.

Meltdown

If all stone blocks are cleared and no new winning combinations are formed, Meltdown mode is triggered. In this mode, all symbols except for cash prize symbols are cleared from the screen, followed by a new symbol drop (avalanche).
Free Spins mode is triggered by collecting 3 or more Free Spins symbols. These symbols accumulate as they appear on the game grid.
If at least one Super Free Spin or Ultra Free Spin symbol lands, the corresponding mode – Super Free Spin or Ultra Free Spin – is activated. If both symbols land, the Ultra mode is activated.

Free Spins

Before the free spins begin, there is an option to upgrade their level via a gamble feature. This process can be repeated until the Ultra mode is achieved or the gamble is lost.

The free spins feature can begin at one of three levels: standard, Level 1, or Level 2. The game features three types of coins – bronze, silver, and gold – with values ​​determined as a bet multiplier that depends on the level. Bronze coins can have the following values: at Level 0 – 1x, 2x, 3x, and 5x the bet; at Level 1 – 2x, 3x, 5x, and 7x the bet; at Level 2 – 3x, 5x, 7x, and 10x the bet; at Level 3 – 5x, 7x, 10x, and 15x the bet; at Level 4 and above – 7x, 10x, 15x, and 20x the bet. Silver coins can have the following values: at Level 0 – 5x, 7x, 10x, 15x, and 20x the bet; at Level 1 – 10x, 15x, 20x, 25x, and 30x the bet; at Level 2 – 15x, 20x, 25x, 30x, and 40x the bet; at Level 3 – 20x, 25x, 30x, 40x, and 50x the bet; at Level 4 and above – 30x, 40x, 50x, 60x, 75x, and 100x the bet. Gold coins can have the following values: at Level 0 – 20x, 25x, 30x, 40x, 50x, 60x, 75x, and 100x the bet; at Level 1: 40x, 50x, 60x, 75x, 100x, 200x, and 300x the bet amount; at Level 2: 60x, 75x, 100x, 200x, 300x, 400x, and 500x the bet amount; at Level 3: 100x, 200x, 300x, 400x, 500x, 700x, and 1000x the bet amount; and at Level 4+: 200x, 300x, 400x, 500x, 700x, 1000x, and 2500x.

During free spins, every collected cash prize symbol advances the progress meter. Collecting four such symbols awards an additional free spin and increases the potential values ​​of the cash prize symbols.
If an extra-spin block symbol is destroyed during free spins, the player is awarded +1 free spin. Once the extra spin is awarded, the corresponding symbol is removed from the grid, making space for other symbols to land.
Once a spin begins, the bet amount for that round is locked and cannot be changed.
If the player’s balance falls below the selected bet amount, the bet is automatically reduced to the highest permissible level (subject to market requirements).
The theoretical Return to Player (RTP) for this game is 96.10%.

Ways

Winning combinations are formed by landing 3 or more identical symbols on adjacent reels from left to right, regardless of their position on each reel. All wins are paid according to the paytable. The maximum number of ways to form a win is 46,656.

Pros & Cons