About TNT Tumble
TNT Tumble was released on 1 April 2020 according to SlotCatalog. The BetsRank database carried November 2020 and a 6x6 grid: both values were wrong. The real grid is 5 reels by 7 rows, or 35 positions.
The starting position is unusual. Of those 7 rows, only the top 4 carry symbols; the bottom 3 are completely walled off with stone blocks, which is 15 unusable positions. Wins form as clusters of at least 3 matching symbols adjacent horizontally or vertically — no paylines at all. Each paid cluster disappears, symbols above drop down, and stone blocks adjacent to the win are removed too. The sequence continues as long as a new win forms. Digging downwards is therefore the permanent objective of the base game.
The wild is the main drilling tool, and its rule is the best idea in the game. When a wild takes part in a win it is not destroyed: it burrows one step down into the stone beneath it. It can stack up to seven high, which is worth 50x stake, and it is only removed once it reaches the bottom of the grid. Some stone blocks contain dynamite: when they blow, they destroy every other block in their row, in the base game and the bonus alike.
Clearing all three stone rows on a single spin triggers the free spins, which start at 6 spins. The player then picks between three modes that Relax presents on its official page as three variations of volatility. Extra Spins is the mildest: stone blocks contain 1, 2, 3, 5 or 10 spins. Multipliers and Spins mixes both and sits in the middle. Multipliers Only is the harshest: blocks contain nothing but 1x, 2x or 3x multipliers, which accumulate across the feature. Clearing three rows during the bonus adds 2 spins.
That volatility choice deserves emphasis. Most games impose their variance; this one hands it to the player, and the RTP stays identical in all three cases. That is the difference between offering an option and offering a trap.
Now the numbers. RTP is 96.11%, meaning the house keeps 3.89 per 100 staked across a very large number of spins. The bonus buy costs 70x stake and, notably, does not change the RTP: it stays at 96.11%. Within this Relax batch that is the exception — Beast Mode gains 0.68 of a point on the buy, Top Dawg$ 0.61, Dead Riders Trail 0.30. Here, buying costs and returns nothing extra, it only speeds up the pace. At 0.10 the buy costs 7; at 100 it costs 7,000. It is banned in the United Kingdom. Stakes run from 0.10 to 100 per the official page, which also flags a German variant at 90.00%. The database claimed a 50 maximum, a corrected value. On max win the sources contradict each other: BigWinBoard states 12,278x, the figure we keep, while SlotCatalog shows 2,088x, which looks like the best single-cluster payout rather than the game ceiling. At 12,278x that is 1,227.80 at 0.10, 12,278 at 1, and 1,227,800 at 100. Within the studio's Tumble series, that ceiling sits between Temple Tumble at 7,767x and Templar Tumble at 17,280x, far behind Sloth Tumble at 100,000x.
