Big Boom Riches Slot Review
Just For The Win, a Microgaming partner, continues to refine their portfolio of straightforward, mechanically sound slots with Big Boom Riches. Released in September 2021, this mining-themed slot operates on a 5×3 grid with 20 fixed paylines, targeting players who value clarity of mechanic over cutting-edge innovation. The theme centres around explosive riches buried beneath the earth, with TNT Wilds serving as the game’s visual and mechanical centrepiece. For players accustomed to traditional slot experiences with genuine high-volatility payoffs, Big Boom Riches delivers exactly what it promises—no pretence, just solid mechanics backed by a 5,000x maximum win potential. The setting features Old Smokey, a characteristically gruff miner, presiding over cascading reels and explosive symbol interactions that fit the mining theme authentically, though the theme itself lacks the thematic freshness that might distinguish it in today’s oversaturated mining slot market.
Base Game & Features
Big Boom Riches operates on a 5×3 grid with 20 fixed paylines—players cannot adjust the number of paylines, which simplifies the betting structure considerably. The minimum bet starts at £0.20 and scales to a maximum of £50, providing reasonable range across different bankroll sizes. The game’s core mechanic is the Rolling Reels system, sometimes called cascading reels, where winning symbols disappear from play and new symbols cascade downward to fill the gaps. This creates the potential for multiple consecutive wins from a single spin, and when combined with certain wild symbols, the cascading action can trigger repeatedly during particularly successful spins.
Special Symbols & Modifiers
Three distinct wild symbols power Big Boom Riches’ feature mechanics, each serving a different purpose. The Regular Wild acts as a standard substitute, replacing pay symbols to complete winning combinations. The TNT Wild provides the explosive action—when it lands, adjacent symbols detonate and disappear, triggering the Rolling Reels cascade. The TNT payout structure scales dramatically with quantities:
- 3 TNT Wilds: 1x stake
- 4 TNT Wilds: 3x stake
- 5 TNT Wilds: 7.5x stake
- 6 TNT Wilds: 15x stake
- 7 TNT Wilds: 30x stake
- 8 TNT Wilds: 75x stake
- 9 TNT Wilds: 150x stake
- 10 TNT Wilds: 300x stake
- 11 TNT Wilds: 1,000x stake
- 12 TNT Wilds: 5,000x stake
Landing all 12 TNT Wilds during a single Rolling Reels sequence produces the game’s maximum win, though achieving this represents an extraordinarily rare occurrence that most players will experience only in theoretical terms. The X-Wild appears exclusively during the Free Spins bonus round, where it increments the progressive multiplier by +1 for each occurrence, creating a non-resetting multiplier system that compounds throughout the bonus round.
The Scatter symbol, depicted as a miner character, triggers the bonus round and also pays independently. Scatter payouts are generous: 3 Scatters deliver 2x your bet, 4 Scatters award 20x your bet, and 5 Scatters pay an impressive 100x your bet. The independent scatter payouts mean you collect immediately upon landing them, even without triggering the bonus.
Big Boom Riches Free Spins
The Free Spins bonus activates when 3 or more Scatter symbols land anywhere on the reels, awarding an initial 9 free spins. The free spins round differs markedly from the base game through the introduction of the progressive multiplier system. Each X-Wild that appears during free spins increases the multiplier by +1, meaning your potential for escalating wins builds as the round progresses. Critically, scatters also retrigger the free spins with no upper limit on additional spins—landing more scatters during the bonus round awards extra spins, extending your opportunity to accumulate multiplier increases through additional X-Wilds.
This multiplier system creates the game’s most exciting moments. Whilst the base game delivers steady, predictable action, the free spins round introduces genuine volatility through the escalating multiplier mechanic. A relatively modest win on the first free spin can transform into something substantially more significant by the final spins of the round, particularly if multiple X-Wilds accumulate. The Rolling Reels cascade alongside these multipliers, meaning a cascade sequence during free spins applies the entire current multiplier value to each winning combination formed through the cascade.
Our Honest Verdict
Rating: 7/10
Big Boom Riches occupies a specific niche within the high-volatility slot landscape—it’s built for players who prioritise mechanical clarity and recognisable features over innovation or thematic distinction. The Rolling Reels mechanic, combined with the three wild types and progressive multiplier system, creates engaging base game action and genuinely exciting free spins moments. The 96.06% RTP sits squarely average for high-volatility titles, offering no statistical advantage or disadvantage compared to similar games in the genre. At £0.20 to £50 per spin, the betting range accommodates most bankroll sizes effectively.
The standout strength lies in execution rather than innovation. Just For The Win have implemented their mechanics competently, and the visual and audio design reinforces the mining theme authentically—TNT explosions sound satisfying, cascading symbols feel rewarding, and the mechanical progression from base game to bonus round flows logically. However, the mining theme has been extensively utilised across numerous slot games, and Big Boom Riches doesn’t offer sufficient thematic freshness to distinguish itself in today’s crowded marketplace.
The 5,000x maximum win potential is theoretically achievable but requires landing all 12 TNT Wilds in a single cascade sequence—an extraordinarily rare outcome that frames the maximum as aspirational rather than practical for most sessions. As a high-volatility game, players should expect significant bankroll fluctuations, including extended dry spells between winning spins. Between paying wins, the base game can feel quiet and unrewarding, meaning sessions may involve extended periods of inaction punctuated by brief explosive moments when cascades and multipliers align.
For players familiar with Just For The Win’s catalogue, Big Boom Riches delivers consistent quality. Traditional slot enthusiasts will appreciate the straightforward mechanics and absence of overwhelming complexity. Those seeking cutting-edge features, innovative bonuses, or thematic originality should explore elsewhere within the developer’s portfolio or consider alternative providers. The HTML5 platform ensures seamless mobile play across all Android and iOS devices without requiring app downloads, providing convenient accessibility for sessions anywhere. Big Boom Riches will more than suffice for players appreciating dependable, uncomplicated gameplay with genuine high-volatility potential, though it doesn’t transcend the category to offer compelling reasons to prioritise it above competing high-volatility releases.
Big Boom Riches FAQs
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What is the RTP of Big Boom Riches slot?
The RTP of Big Boom Riches is set to 96.06%, which is pretty average for a highly volatile slot game. Operators can customise the RTP—it can alternatively be 94.14% or 96.48% with Buy Free Spins, though 96.06% remains the standard default version. -
What is the maximum win in Big Boom Riches?
You can win up to 5,000x your stake both in the base game and during the bonus round. This maximum is achieved by landing all 12 TNT Wilds on a single spin during a Rolling Reels cascade sequence, though achieving this represents an extraordinarily rare occurrence. -
Is Big Boom Riches a high volatility slot?
Yes, Big Boom Riches is a highly volatile mining slot from Just For The Win. High volatility means that whilst the game offers substantial win potential, players should prepare for significant swings in their bankroll during gameplay, including extended dry spells between winning spins. -
How do you trigger free spins in Big Boom Riches?
Three or more miner Scatter symbols trigger the Free Bonus Spins Round, awarding 9 free spins initially. Scatters also pay prizes independently: 3 pay 2x your stake, 4 pay 20x your stake, whilst 5 pay 100x your stake. During free spins, any additional scatters that land award extra spins with no upper limit. -
Can you play Big Boom Riches on mobile?
Yes, Big Boom Riches is fully playable on mobile devices thanks to its HTML5 platform development. It’s available on a wide range of Android and iOS devices with no requirement to download any slot application, providing flexible play options anywhere. -
What are the main features of Big Boom Riches?
The main features include Rolling Reels (cascading reels where winning symbols disappear and new ones cascade down), three types of wild symbols—Regular Wild, X-Wild with progressive multiplier function, and TNT Wild with explosion mechanics—plus a Free Spins bonus round. The X-Wilds create a non-resetting multiplier that increases by +1 with each wild during free spins, significantly boosting win potential. -
Is there a bonus buy feature in Big Boom Riches?
Yes, a bonus buy feature is available for players outside the UK. Non-UK players can purchase the free spins round directly for 50x the stake. However, this feature is not available to UK players due to regulatory restrictions imposed by the UKGC. -
What is the theme and setting of Big Boom Riches?
Big Boom Riches features a mining theme centred around Old Smokey, a characteristic miner character. The game revolves around mining explosions and riches, with TNT Wilds and explosive mechanics fitting the mining aesthetic. The game plays on a 5×3 grid with 20 fixed paylines and combines cascading reels with explosive symbol interactions.
