Big Boom Riches Slot Review

Expert Rating: 4 out of 5
Review by Martin Backhouse
Last update 16th June 2022
Review by Martin Backhouse
Last update 16th June 2022

Go digging for a jackpot that can get as high as 5,000 x your stake in the Big Boom Riches slot, an explosive mining-themed slot created by Just For The Win and powered by Microgaming. It’s a 5 reel, 20 payline video slot that comes with Rolling Reels which trigger each time you land a winning combination. Other ways of detonating a decent score include special TNT Wilds which award cash prizes if you land 3 or more TNT Wilds on the same spin. Trigger the Free Spins feature and you’ll receive a minimum of 9 free spins with an expanding multiplier which increases by 1 x with each X Wild that lands. Find out more in our complete Big Boom Riches review.

Big Boom Riches
5,000 x bet
Type of slot
Video Slot
Stakes Range
20p to £50
Bonus Features
Yes (4)
Free Spins/Multiplier
Max Win
5,000 x
Very High

Big Boom Riches

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Big Boom Riches Slot RTP, Details & Wager Limits

Reels/Paylines: 5 reels + 20 paylines

Stakes Range: 10p to £50 per spin

Max Win: 5,000 x stake per spin

RTP: 96.06%

Big Boom Riches is played on a 5 reel, 3 row, 20 payline machine. Winners are created by landing 3, 4 or 5 matching symbols or wilds from left to right in a payline, starting from the leftmost reel.

Slightly unusually for a paylines slot, Rolling Reels are active here. Land a winning combination and the successful symbols explode from the reels and new symbols drop into the vacated positions.

Reel Rolls also trigger whenever a TNT Wild lands with all symbols adjacent to the TNT Wild (apart from scatters and standard wilds) being removed from the grid. The Reel Rolls continue until no new winner is formed or no new TNT Wild or X Wild land.

Stakes in Big Boom Riches range from between 20p and £50 per spin. To adjust your stake, click on the coin above the spin button.

To access the paytable, click on the 3 dots then choose the gold star. Payout amounts are shown as cash value and are relative to your current stake level.

The Big Boom Riches RTP is 96.06% which is about average. The hit rate is just over 27% so on average, you’ll land a winner on just over a quarter of spins.

As you might expect for a slot with this theme, the action here is explosive as far as the variance is concerned. The Big Boom Riches slot game volatility is very high. The maximum win is 5,000 x your stake.

Theme – Audio & Design Features – Dig for Victory

Theme: Mining

High Value Symbol: Miner Scatter

Compatibility: Mobile, Tablet, Desktop


The cartoon-style design in the Big Boom Riches slot game is simple but rather nicely done. You’ll see mountains in the background as well as a railroad and plenty of sticks of dynamite. Graphics is something slot provider Just for the Win always does well.

The wooden reels are made up of A to J royals and 4 higher-paying gemstone symbols. The best of the quartet is the pink gem which pays 15 x your stake if you land 5 in a line.

The game also comes with 3 different wilds – Standard Wild, TNT Wilds and X Wilds. These all replace everything apart from the scatter and pay 1, 3 or 15 x stake if you land 3, 4 or 5 in a line. The TNT and X Wilds can deliver special extras which we’ll look at below.

The grizzly old miner is the scatter symbol and that scatter symbol is also the most valuable one in the game. You’ll also hear a hillbilly-style backing track while you spin which is a good fit for the mining theme. It’s not the flashiest slot you’ll play but the blue-collar design works pretty well.

Here’s a useful list of the symbols used in the game and their potential winning returns:

Symbol Paylines
big-boom-riches-slot-j-symbolJ 3, 4, or 5 = 0.2, 0.5 or 1 x stake
big-boom-riches-slot-q-symbolQ 3, 4, or 5 = 0.2, 0.5 or 1 x stake
big-boom-riches-slot-k-symbolK 3, 4, or 5 = 0.2, 0.6 or 1.5 x stake
big-boom-riches-slot-a-symbolA 3, 4, or 5 = 0.2, 0.6 or 1.5 x stake
big-boom-riches-slot-purple-gemstone-symbolPurple Gemstone 3, 4, or 5 = 0.4, 1 or 3 x stake
big-boom-riches-slot-green-gemstone-symbolGreen Gemstone 3, 4, or 5 = 0.5, 1.5 or 5 x stake
big-boom-riches-slot-orange-gemstone-symbolOrange Gemstone 3, 4, or 5 = 0.8, 2.5 or 7.5 x stake
big-boom-riches-slot-pink-gemstone-symbolPink Gemstone 3, 4, or 5 = 1, 3 or 15 x stake
big-boom-riches-slot-tnt-wild-symbolTNT Wild 3, 4, or 5 = 1, 3 or 15 x stake and substitutes all symbols except scatter
big-boom-riches-slot-wild-symbolWild 3, 4, or 5 = 1, 3 or 15 x stake and substitutes all symbols except scatter
big-boom-riches-slot-wild-x-symbolX Wild 3, 4, or 5 = 1, 3 or 15 x stake and substitutes all symbols except scatter
big-boom-riches-slot-miner-scatter-symbolMiner Scatter 3, 4, or 5 = 2, 20 or 100 x stake plus 9 free spins
big-boom-riches-slot-miner-free-spins-scatter-symbolMiner Free Spins Scatter 1 extra free spin for every one that lands

Big Boom Riches Mobile


Big Boom Riches is available to play on all devices including desktop and laptop computers, tablets and mobiles. The graphics are sharp and it’s arguably more convenient on a smaller screen.

Big Boom Riches Bonus Features

This mining-themed slot comes with a decent array of extras. Special TNT wilds can deliver instant prizes. There’s also a free spin round where an expanding multiplier can get the cashier bouncing along nicely.

TNT Wilds feature

Big Boom Riches comes with 3 different wild symbols. As well as substituting for all the standard symbols when it makes up part of a winning combination, the TNT Wilds can also deliver some potentially high instant cash bonuses. To win one of them, you’ll need to land 3 or more TNT Wilds on the same spin. The more TNT Wilds, the bigger the prize.

Number of TNT Wilds Multiplier
3 1x stake
4 3x stake
5 7.5x stake
6 15 x stake
7 30 x stake
8 75 x stake
9 150 x stake
10 300 x stake
11 1,000 x stake
12 5,000 x stake

Free Spins with Expanding Multiplier feature


Land 3 or more miner scatter symbols anywhere on the reels on the same spin and you’ll trigger the main bonus round. After a payout equal to 2, 20 or 100 x your stake, you’ll go on to play 9 free spins.

The round starts with a 1 x multiplier active. Hope to see plenty of X Wilds in this round. Each time one appears, it increases the value of that multiplier by 1 x. This doesn’t reset following an unsuccessful spin either, it can increase throughout the feature.

Scatters don’t offer any payouts during this round. Each time one lands though, one extra free spin is added to your current total.

In some territories, including the UK, players will have the opportunity to buy the Free Spins round. This costs a fee of 50 x your stake.

Big Boom Riches Slot Review Summary – Very Entertaining and Very Volatile

Theme & Symbols

Sounds & Music

Bonus Features

RTP (96.06%)

Max Win (5,000 x)


We enjoyed analysing this slot and writing our Big Boom Riches slot review. The rather anarchic design and features are a good fit for the theme. There’s plenty going on here thanks to the Rolling Reels mechanic and the variety of extras.

Other top mining-themes games you may be interested in include Fire in the Hole by NoLimit City and Big Time Gaming’s popular Bonanza Megaways slot, which both offer a different way of playing and additional bonus features.

You’d expect a mining themed slot to be a volatile one and Big Boom Riches doesn’t disappoint on that score. Get the multipliers rolling in the free spins round and this slot could live up to its explosive name.

  • 5,000 x max win
  • Good free spins bonus features
  • Great on mobile
  • Very high volatility

Big Boom Riches FAQs

What is the Big Boom Riches RTP?

The Big Boom Riches RTP is 96.06% which is pretty standard. The volatility in Big Boom Riches is very high so tread carefully.

What is the Big Boom Riches max win?

The max win in this game is 5,000 x your total stake. The bigger wins come from the features, but landing 12 TNT-Wild symbols will land the 5,000 x win.

Is there a Big Boom Riches free spins round?

Trigger the bonus round and you’ll receive 9 free spins. Each time a special X Wild appears during the free spins, it increases the value of a multiplier by 1 x. Each scatter that lands adds 1 more spin to your total.

What is the TNT Wilds feature?

As well as acting like a standard wild and substituting for all the standard symbols, TNT Wilds can also deliver cash prizes if you land 3 or more of them on the same spin. Land 12 of them and you’ll get 5,000 x your stake in return.

Is there a Big Boom Riches free play slot?

You can play Big Boom Riches for free on your computer, tablet or mobile device here at