TNT Tumble Slot: Overview

TNT Tumble is the latest grid-based entry in Relax Gaming’s Tumble series. Built around a mining theme, it packs in a range of smart mechanics, symbols, and play features. It’s also not arriving out of nowhere, sharing a few familiar ideas with earlier Relax Gaming grid slots—Temple Tumble Megaways especially. Both, for instance, include bonus rounds with three selectable options that influence volatility. Even with those overlaps, TNT Tumble delivers an excellent bonus round and ultimately does plenty to step out from the shadow of its predecessors and feel like its own game.

Visually, it sets a charming scene. TNT takes place in a mine shaft set in an alpine region—think Switzerland or Austria. The brick-and-iron mine opens out onto a wide meadow framed by snowy mountain peaks. It looks like spring or summer, with flowers in bloom and an almost tangible warm mountain breeze. Once you’ve taken it all in, tap the triple coin button to set your stake, ranging from 10 c/p to $/€100 per spin.

With every spin, symbols and stone blocks cascade into the 5×7 grid. At the start, symbols occupy only the top 4 rows, while the bottom 3 rows are filled with stone block blockers that can be cleared when a winning cluster lands beside them. When a win hits, the contributing symbols are removed so new ones can drop in, and any neighboring stone tiles are cleared too. The chain continues until no further wins appear, at which point the next tumble begins.

The symbol set isn’t the flashiest you’ll ever see, but it’s perfectly serviceable. From lowest to highest value you have: a silver nugget, a gold nugget, blue gem, green gem, orange gem, and red gem—the top payer, awarding 15 times your stake for seven connected. Wins require at least 3 matching symbols linked horizontally or vertically.

Backing you up is the wild drill symbol. True to its name, it doesn’t just substitute—when wilds are part of a win, they stay on the grid and drill down into the stone tiles below. Drills can stack, with 7 paying 50 times your total stake. Only once wilds reach the bottom of the grid are they finally removed. It may not sound dramatic on paper, but these wilds are hugely impactful and contribute to a large share of the wins you’ll see. Watching several drills carve through the grid at once can be a genuinely thrilling moment.

Digging into the numbers, the game offers a healthy RTP of 96.11%. Notably, activating the bonus buy doesn’t increase RTP, which is something you might otherwise expect. Still, it’s a solid figure, supported by a fairly high hit rate and volatility that you can select when the bonus round triggers—medium, high, or very high.

TNT Tumble Slot: Features

The base game has its moments, but things can turn chaotic in the Bonus game, which activates when all 3 rows of stone blocks are blown away in a single spin. The bonus begins with 6 free spins, and just like Temple Tumble, players can pick one of three options:

• Extra Spins (medium volatility): Special stone blocks contain 1, 2, 3, 5 or 10 extra spins.
• Multipliers & Extra Spins (high volatility): Special stone blocks contain added multipliers or extra spins.
• Multipliers (very high volatility): Special stone blocks contain 1x, 2x, or 3x added multipliers.

Extra spins and multipliers are locked inside special stone blocks on the grid. When those blocks are destroyed, an extra spins block grants 1, 2, 3, 5, or 10 free spins, while a multiplier block adds x1, x2, or x3 to the bonus game progressive multiplier. Keep smashing stone blocks, because removed stones don’t reset between spins, and clearing three rows awards +2 free spins.

One additional special symbol is worth noting: the dynamite stone block, which can appear in both the base game and the bonus. When it’s removed, it detonates and wipes out all other stone blocks in the same row.

If you’d rather skip the grind of clearing stones in the base game, you can use the Bonus Buy option for 70 times your total stake.

TNT Tumble Slot: Verdict

It’s true that TNT Tumble borrows some familiar ingredients from other Relax Gaming grid slots, with Temple Tumble Megaways being the closest comparison. The three bonus options follow the same general idea, but once TNT gets rolling, that similarity fades into the background. The real headline act is the drilling wild—it can go wild, piling up win connections, smashing stone tiles, linking with additional drills, and generally unleashing chaos across the grid.

These grid-style slots tend to shine most when they’re firing off long chains of wins and feature interactions, and the drill sits at the heart of many—if not most—of those sequences. It’s worth trying simply to watch it do its work; it’s an impressive mechanic in motion.

Overall, TNT Tumble may not look like much from a static screenshot, but it’s a highly entertaining grid slot from Relax Gaming. The base game can feel a little slow now and then, yet that’s quickly overshadowed by a superb bonus round capable of going on some scorching streaks. Add in a simulated max win of 12,278 times the stake (2,088x max payout in a single spin) and you’ve got a recipe for explosive grid-slot fun.

Don’t Miss…

If you’re chasing even higher max win potential, we suggest taking a look at Relax Gaming’s pixelated video game inspired Hellcatraz slot, which can deliver wins of over 50,000 times your total stake.