Diamond Mole

Diamond Mole is a cluster-pays slot from Backseat Gaming, a studio working alongside Hacksaw Gaming, and it drags players into a scruffy little world of dirt, turf and tunnelling rodents. In practice the action never actually goes underground; the grid stays above ground throughout, with the lighting shifting between base game and bonus rounds to signal a change of pace rather than a change of scenery.

Rather than paylines, wins are built from clusters: land five or more matching symbols connected horizontally or vertically anywhere on the 6-reel grid and they pay out, then vanish to make way for a tumble of new symbols dropping in behind them. That tumbling repeats for as long as fresh clusters keep forming, so a single spin can snowball through several connected wins before it settles.

The paytable is kept simple — royals from 10 through to Ace sit at the bottom, with shovels, lanterns, stopwatches and the mole itself carrying the bigger payouts. It's the Diamond Wilds that do the real work, though: they're sticky once they land, and every time one takes part in a winning cluster its multiplier doubles, so a single wild that keeps getting reused can escalate a modest cluster into something considerably larger.

With volatility rated High at the top of the scale, Diamond Mole isn't shy about its intentions — this is a slot built for streaky, boom-or-bust sessions rather than a steady drip of small returns. The hit frequency sits at 44%, so wins land reasonably often, but plenty of those will be modest tumbles rather than the multiplier-fuelled clusters players are really chasing. The 96.31% RTP is a solid, above-average figure for the category, meaning the game is configured to hand back a fair proportion of stakes over the long haul, while the 25,000x max win gives a sense of just how far a run of doubling wilds can theoretically stretch.

Given how closely it mirrors the mechanics of the original Hacksaw Gaming release, this version is really aimed at players who prefer wagering through the Backseat Gaming label specifically, or who simply want to try the format from a different angle in the catalogue. Either way, the appeal is the same: simple cluster mechanics doing a lot of heavy lifting through a sticky, multiplying wild.

Anyone curious about how the doubling wilds actually snowball is best off testing the water first — fire up the free demo of Diamond Mole at johnessyslots to get a feel for the tumble rhythm before committing real stakes to chasing that 25,000x ceiling.