The bony band returns — bigger, bolder, and absolutely blinding.
Thunderkick's most celebrated franchise has strutted back from the grave once more, and this time round the lads have gone completely and utterly bonkers. Esqueleto Explosivo 4 is everything the devoted fanbase has been hollering about since the third instalment wrapped up: a proper evolution, not a mere spit-and-polish.
The iconic skeleton mariachi band — Enrico Mortis and his magnificent, bony ensemble — have taken the stage on a grander 6×6 cluster pays grid. The Día de Muertos town square is lit like the finest Mexican carnival you've ever had the privilege of stumbling into, draped in marigolds, candlelight, and the kind of cheerful chaos only the dearly departed can manage. Two Explosivo Wilds now stalk the grid simultaneously, multipliers climb to dizzying 4,096x peaks during the Grand Fiesta Bonus, and Thunderkick have slipped in a handful of crackling new mechanics that make the fourth instalment feel genuinely fresh rather than a recycled knees-up.
Whether you're a long-standing devotee who remembers the original 5×3 setup from 2015, or a fresh-faced punter curious what all the fuss is about, Esqueleto Explosivo 4 is an absolute blinder of a slot. Gear up, grab a marigold, and mind the explosions.
The Esqueleto Explosivo franchise has quietly become one of the most consistently impressive slot series in the industry. Each new chapter has expanded the grid, deepened the mechanics, and raised the maximum multiplier bar considerably. Here's how the series evolved — and where Esqueleto Explosivo 4 takes things next.
For the first time in the series, two Explosivo Wild symbols can be active on the grid simultaneously. Each one detonates a 3×3 radius of symbols around it, clearing the way for cascading new arrivals. When both fire in the same Avalanche sequence, the chaos is genuinely spectacular — and the multiplier leaps accordingly.
The beloved Mucho Multiplier trail — a staple of the series since its third chapter — has been expanded enormously. In the base game the multiplier climbs through 1x, 2x, 4x, 8x, 16x, 32x, 64x, and 128x with each successive Avalanche win. During the Grand Fiesta Bonus it doubles at every step, topping out at a staggering 4,096x the total bet.
Land three or more Scatter symbols — depicted as golden marigold wreaths — to trigger the Grand Fiesta Bonus. Three Scatters award 10 free spins; four award 14; five award 18. Multipliers carry over between spins rather than resetting, meaning a prolonged Avalanche chain early in the bonus can set a fearsome foundation for every spin that follows. Retriggers add five additional spins.
The foundational mechanic of the series returns, now operating across the full 6×6 arena. Winning cluster symbols vanish, the Mucho Multiplier rises one step, and fresh symbols tumble in from above. Chains of consecutive Avalanches can transform a modest opening cluster into a spectacular multiplied cascade — just as fans expect from Esqueleto Explosivo.
The grid has grown from the 5×5 introduced in the third instalment to a full 6×6 arena — 36 symbol positions packed with bony musicians. Winning clusters require five or more adjacent matching symbols, connecting horizontally or vertically. The larger canvas creates more room for simultaneous multi-cluster wins, which in combination with the Dual Explosivo Wilds can produce absolutely breathtaking Avalanche sequences.
Can't wait for those scatters to show up naturally? Thunderkick have included a Feature Buy option, allowing players to purchase direct entry into the Grand Fiesta Bonus for a set cost of 80x the current stake. This is identical in principle to the buy available in Esqueleto Explosivo 3, and is a firm favourite among high-rollers who want to skip straight to the multiplier mayhem.
For players who want a middle ground between standard play and the full Feature Buy, Bet Plus mode increases the Scatter frequency by a meaningful margin in exchange for a modest stake uplift. It's the sensible option for those who prefer a longer session with slightly elevated bonus hit rates — very much a Thunderkick signature touch carried forward from the previous chapter.
Like every title in the Esqueleto Explosivo lineage, the fourth instalment is entirely at home on smartphones and tablets. The 6×6 grid scales gracefully to portrait and landscape orientations, touch controls are precise, and the iconic skeletal animations remain crisp and fluid whether you're on a flagship handset or a mid-range device.
Each consecutive Avalanche win advances the multiplier one step along the trail. In the Grand Fiesta Bonus the trail doubles in length, with the potential to reach 4,096x your stake. The multiplier resets to 1x at the start of each new spin, but during free spins it carries over between consecutive non-winning drops.
Base game maximum: 128x | Grand Fiesta Bonus maximum: 4,096x | Multiplier resets at start of each new spin in base game only
The skeleton mariachi band are the very soul of the Esqueleto Explosivo universe. Each member represents a distinct symbol tier on the grid, from the humble backing vocalists right up to the flamboyant lead players who trigger the most jaw-dropping payouts. For the fourth instalment, Thunderkick have given the entire ensemble a gloriously ornate redesign — same bones, entirely new threads.
The undisputed star of the show. Enrico's golden skull is the highest-paying symbol and the man behind the Explosivo Wild. When he explodes, everything in a 3×3 radius goes with him.
The fiery trumpeter who belts out a piercing note every time a cluster forms. Second-highest paying symbol and a firm fan favourite since the original release.
The soulful accordionist, recognisable by his cobalt-blue skull. Mid-tier paying symbol with a wonderfully mournful wail that fires every time a winning cluster lands.
The deep-voiced bassist who underpins every Avalanche cascade. Rose-pink skull, mid-tier value, and new to the fourth chapter as a freshly promoted member of the ensemble.
The mournful violinist whose emerald skull haunts the lower-middle pay bracket. Felipe has been with the band since the very first night of the dead, and his fiddle fills the air between Avalanche bursts.
The newest recruit — a whip-smart rhythm player whose violet skull populates the grid in abundance. Lowest individual value but the most common symbol, making her the engine behind many a lengthy Avalanche chain.
Use the bet selector at the foot of the screen to choose your wager. Esqueleto Explosivo 4 accepts bets from £0.10 up to £100 per spin, accommodating penny players and high-rollers with equal generosity. All wins and Feature Buy costs are calculated as a multiple of your selected bet.
Click Spin — or activate Autoplay for a hands-off session — and watch Enrico's crew tumble onto the 6×6 grid. Winning combinations require clusters of five or more identical adjacent symbols, connected horizontally or vertically. Multiple clusters can pay simultaneously from a single drop.
Every winning cluster explodes, the Mucho Multiplier notches up one step, and fresh symbols rain down from above to fill the vacated positions. If the new arrivals form further clusters, the Avalanche continues — and the multiplier keeps climbing. The sequence ends only when no new winning clusters form.
The golden Explosivo Wild substitutes for all standard symbols. More critically, it detonates every symbol in a 3×3 area around it, opening up space for further Avalanche sequences. With two Explosivo Wilds now possible on the grid simultaneously, a fortunate dual-detonation can clear enormous swathes of the board at once.
Land three, four, or five marigold Scatter symbols anywhere on the grid to launch the Grand Fiesta Bonus. You receive 10, 14, or 18 free spins respectively. During the bonus the multiplier trail doubles in size, carries over between spins, and can ultimately reach 4,096x — the highest point in series history. Retriggers are possible.
Short on patience? The Feature Buy button (80x your stake) takes you straight to the Grand Fiesta Bonus. For a more measured approach, Bet Plus marginally increases your stake in return for a boosted Scatter frequency — ideal for extended sessions when you'd rather let the bonus arrive naturally, just a touch sooner than usual.
Everything you need to know about the numbers behind Esqueleto Explosivo 4, laid out plainly for the analytical player.
| Specification | Detail |
|---|---|
| Developer | Thunderkick |
| Release Year | 2026 |
| Theme | Día de los Muertos — Day of the Dead |
| Grid Layout | 6×6 (36 symbol positions) |
| Pay Mechanic | Cluster Pays (5+ adjacent matching symbols) |
| Symbols | 6 skull characters + Wild + Explosivo Wild + Scatter |
| RTP (Standard) | 94.22% |
| RTP (Feature Buy) | 94.22% |
| Volatility | High |
| Max Win | 10,000x the total bet |
| Max Multiplier (Base) | 128x |
| Max Multiplier (Bonus) | 4,096x |
| Min Bet | £0.10 / €0.10 |
| Max Bet | £100 / €100 |
| Feature Buy Cost | 80x stake |
| Free Spins (3 Scatters) | 10 spins |
| Free Spins (4 Scatters) | 14 spins |
| Free Spins (5 Scatters) | 18 spins |
| Retrigger Spins | +5 per retrigger |
| Explosivo Wild Blast Radius | 3×3 (removes up to 8 surrounding symbols) |
| Platforms | Desktop, Mobile (iOS & Android), Tablet |
| Currency Support | GBP, EUR, USD, CAD, SEK, NOK + others |
| Bet Plus Mode | Yes — increased Scatter frequency |
Absolute corker of a slot. The dual wilds going off at the same time is something I wasn't prepared for. My bankroll is in tatters and I've never been happier about it.
Been playing the series since part one back in 2015. This is the best one yet, full stop. The 6×6 grid changes the feel entirely. Thunderkick have really gone for it this time.
The multiplier trail in the bonus is absolutely mental. Hit 512x during a free spins session and nearly fell off my chair. The music slaps as well. Brilliant game all round.
Try the free demo and get a feel for the Dual Explosivo Wilds and the Grand Fiesta Bonus before committing a penny. Or crack straight on and play for real — the choice is yours.
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