Dig deep below the ground and get hunting for gold in Twice the Money, a mining themed slot from Ainsworth Technologies. It’s a 5 reel, 30 payline game that comes with a free spins feature with expanding wild multipliers that start at 2x before increasing to 4x and even 8x. Play from between 30p and £3,000 per spin.

Twice the Money has the style of design you’ll find in pretty much all Ainsworth powered slots – set against a golden mineshaft backdrop the reels are reminiscent of what you’ll see on a typical live casino machine.

Joining the A to 9 playing cards are a miner’s lamp, underground railroad and cart full of coins. All 3 of these pay up to 5 times your total stake. Next come the Gold Mine Here sign and the weighting scales which award up to 10 times your total bet. The dynamite is the wild. It appears on reels 3, 4 and 5 only and substitutes for all other symbols apart from the scatter.

The gold nugget symbol is the scatter – land 3, 4 or 5 of these anywhere on the reels and you’ll pocket a prize of 2, 10 or 100 times your total stake. You’ll also trigger the Free Games feature and with it, 10 free spins.

The set up for the free spins is a little different from what’s on offer in the base game – the standard wild dynamite symbol lands on reels 2 and 4 only. Added to the reels is the multiplier dynamite which can land on the middle reel only.

If the dynamite wild forms part of a winning combination, the payout is boosted by a multiplier prize. On free spins 1 to 4, the payout is doubled. On free spins 5 through 8, they are quadrupled. On the final 2 free spins, the multiplier is a whopping 8x. Land 3 scatters during the feature and you’ll trigger the Twice the Money feature and with it, another 5 free spins, complete with wild multipliers.

Twice the Money is a simply designed slot – the features aren’t especially complex either but the free spins round can certainly pack a punch thanks to the dynamite multipliers. Get lucky with those wild wins towards the end of the free spins and the 10x boost can deliver some mighty explosive results. If the like the mining theme, NetEnt’s Boom Brothers is recommended.