TNT Tumble

TNT Tumble by Relaxgaming is a video slot played on a 5-reel, 7-row grid where the bottom three rows start completely blocked by stone. Symbols win when groups of at least three matching gems or nuggets cluster horizontally or vertically. A key feature is the drilling wild which, whenever part of a winning combo, burrows down one row into the stone instead of disappearing — it can stack up to seven high and only goes once it reaches the bottom. The game includes a tumble (cascade) mechanic so that winning symbols disappear and new ones fall from above; adjacent stone blocks are also removed when wins happen next to them. There are dynamite blocks mixed into the stone—when those are cleared, they blow up and destroy all the stone in their row. Clearing all three stone rows in a single spin triggers the free spins feature. At that point the player must select one of three different free spins modes: Extra Spins (medium volatility), Multipliers & Extra Spins (high volatility), or Multipliers Only (very high volatility). Each mode starts with six free spins, and in modes other than the basic one, clearing each full row of remaining stone gives two extra spins. There’s also a feature buy option that lets the free spins feature be activated immediately for a cost 70× the bet. Minerals, drill-wilds and explosive stone blocks all tie into the adventurous mining theme.

You can play it for real money.