| RTP | 96.45% |
| Volatility | High |
| Max win | 20,000x |
| Provider | Print Studios |
| Release | 2023 |
| Grid | 5x4 base (26 paylines), expands to 6x5 (52 paylines) in free spins |
| Mechanic | Paylines + Holy Hand Grenade symbol transform + SuperSpinner multipliers |
| Bets | €0.10 – €90 |
| Multipliers | SuperSpinner multipliers stacking multiplicatively in free spins |
| Free spins | 7 / 9 / 11 spins from 3 / 4 / 5 scatters |
| Mobile | Yes |
RTP & max win are the provider's published figures. Some operators run modified RTP versions — always check in the game info panel. 18+ · Play responsibly.
Play Holy Hand Grenade for free (demo)
Try Holy Hand Grenade below with virtual demo credits — same math model, same features, zero real money. I always recommend a demo session first to feel the variance before you ever consider real stakes.
My review of Holy Hand Grenade
My experience
I came to Holy Hand Grenade expecting a one-joke novelty and left genuinely fond of it. Print Studios nail the tone — the stained-glass church backdrop, the chanting monks, the absurd little relic ticking in the corner of the screen — and the humour never feels forced. Mechanically, the base game is a fairly traditional 5x4, 26-payline slot, but the Holy Hand Grenade lifts it: after every spin's wins are tallied, the grenade explodes and converts a random clump of adjacent symbols into one matching symbol. Plenty of spins that looked dead suddenly pay because of it, and that little jolt of 'wait, did that just connect?' is the thing that kept me spinning.
The honest truth, though, is that the base game is where you'll spend most of your time, and it can run thin. Print Studios quote the free spins at roughly 1 in 288 spins, so you should expect long dry patches between bonuses — that's not a flaw, it's just what High volatility looks like in practice, and averages lie hard over a single session. I went well over a hundred spins twice without a sniff of the goat scatters, which is exactly the kind of drought you have to budget for.
When the bonus does land, the game transforms — literally. The grid expands from 5x4 to 6x5 with 52 paylines, the SuperSpinner multiplier markers come into play between the reels, and the grenade explosions start leaving sticky positions that feed into each other. Chain a few explosions through a couple of stacked SuperSpinners and the numbers climb fast; that compounding is where the entire 20,000x ceiling is built, and it's a satisfying, legible system rather than a black box. It rewards a good free-spins round without ever guaranteeing one.
I also tried the Scatter Boost ante-bet and the bonus buy. The Scatter Boost adds 50% to your stake for more frequent scatters and a slightly higher 96.64% RTP, while the 95x bonus buy (96.82% RTP) drops you straight into the feature where it's permitted. Neither changes the fundamental deal — they shift variance and frequency, not value — and the buy in particular accelerates the swings hard. I'd treat both as optional flavour, not a strategy, and only ever with money set aside for entertainment.
Strengths
- Genuinely funny, original Monty Python-inspired theme with strong art and sound
- The Holy Hand Grenade transform turns dead spins into payable ones and feels great
- Free spins expand the grid from 5x4 to 6x5 (52 paylines) for a real step-up
- SuperSpinner multipliers stack multiplicatively for a legible, satisfying bonus engine
- Fair 96.45% base RTP (up to 96.82% via bonus buy) for a High-volatility title
- 20,000x max win gives the bonus a meaningful ceiling
- Smooth HTML5 performance on mobile and desktop
Weaknesses
- High volatility — expect long cold runs (free spins around 1 in 288 spins), so budget for droughts
- The 20,000x ceiling is astronomically rare; treat it as a lottery ticket, never a target
- Base game can feel thin between bonuses, leaning heavily on the single grenade mechanic
- Scatter Boost and bonus buy shift variance and cost, not long-term value — and buys are banned in some jurisdictions including the UK
- Operators may run alternative RTP versions, so always check the in-game info screen first
Who is Holy Hand Grenade for?
Holy Hand Grenade suits players who want a High-volatility slot with personality rather than another grim, gritty grind. If you enjoy the cascade-and-transform feel of Sweet Bonanza or the explosive bonus build of Razor Shark but want lighter, funnier theming, this lands right in that pocket. It's also a good pick for theme-chasers — the Monty Python homage is the most charming thing Print Studios have made — and for curious players, since the free demo on this page costs nothing and is the smartest way to feel out the grenade mechanic and the SuperSpinner bonus before risking a cent. If you prefer frequent small wins, my reviews of gentler games like Big Bass Bonanza will serve you better. Whoever you are: this is High volatility, so set a budget before you spin, never chase losses, and remember the house edge of roughly 3.55% never sleeps.
How Holy Hand Grenade works
At its core, Holy Hand Grenade is a payline slot with a twist that fires on every single spin. You play a 5x4 grid for 26 paylines, but after each spin's wins are counted the grenade detonates and reshapes the board — and in free spins the whole game grows, with SuperSpinner multipliers and chained explosions doing the heavy lifting toward the 20,000x ceiling. Here is every mechanic, one by one.
Holy Hand Grenade
The signature mechanic, and it fires after every spin. Once any wins are evaluated, the grenade explodes and transforms a random number of adjacently linked symbols into one matching symbol. This frequently converts a non-winning board into a paying one, or extends a small win into a bigger combination. It's the single feature the whole game is built around, and it's what stops the base game from ever feeling completely flat.
SuperSpinners
Numbered multiplier markers that sit in the spaces between the reels. When a winning payline passes through a SuperSpinner, that win is multiplied by the marker's value, and if a line runs through several SuperSpinners their values apply one after another — multiplicatively. They come into their own during free spins, where stacking them on top of grenade explosions is exactly how the big four- and five-figure-multiplier rounds get built.
Free Spins Trigger
Landing 3, 4 or 5 Goat scatter symbols awards 7, 9 or 11 free spins respectively. Print Studios quote the trigger frequency at roughly 1 in 288 spins, so it's an event rather than a regular occurrence — plan for dry stretches between bonuses. The scatters are also the gateway to the expanded grid, so every goat you see is worth paying attention to.
Expanding Grid
When the free spins begin, the playing field physically grows from the base game's 5x4 grid with 26 paylines to a larger 6x5 grid with 52 paylines. More reels and rows mean more room for the grenade to chain explosions and for SuperSpinners to line up. It's a satisfying, visible step-change that makes the bonus feel like a genuinely different, higher-ceiling game.
Chained Explosions
Inside free spins the grenade's explosions can leave behind sticky, locked positions that persist through the round and amplify any further explosions that land near them. Each new grenade can set off the next, creating cascading chain reactions across the bigger board. This compounding is the heart of the bonus and the reason a single strong free-spins round can dwarf hundreds of base-game spins.
Scatter Boost
An optional ante-bet that costs an extra 50% on top of your stake and increases how often scatters appear, raising the theoretical RTP slightly to 96.64%. It's a frequency-and-variance trade, not free value — you're paying more per spin for a better shot at the bonus. Useful if you specifically want to hunt free spins, but it burns through a bankroll faster, so size it carefully.
Bonus Buy
Where local rules allow, you can buy directly into the free spins for 95x your stake, with the bought feature carrying a slightly higher 96.82% RTP. As always with buys, it's a question of variance rather than value — you skip the grind but accelerate the swings dramatically. Only ever use money set aside for entertainment, and note that bonus buys are banned in some jurisdictions, including the UK.
Holy Hand Grenade FAQ
Where to play Holy Hand Grenade
Holy Hand Grenade is Print Studios at their most playful: a Monty Python homage with real charm, a grenade mechanic that fires on every spin and genuinely changes outcomes, and a free-spins round where an expanding grid, chained explosions and stacked SuperSpinner multipliers build toward a 20,000x ceiling. The 96.45% base RTP is fair, the bonus is legible and satisfying, and the humour gives it a personality most slots lack. But let me be clear: Print Studios rate this High volatility, and that means long cold stretches and most sessions ending in the red — that's what a roughly 3.55% house edge plus this variance produces in practice, and the base game can feel thin while you wait. Play the free demo first, size your bets like a professional, and treat any big bonus as the exception, never the plan. 8.1/10: a clever, charming slot that earns its place — as long as you respect the swings. 18+, play responsibly.
30 free spins or 50% freebet — Casino code MOON or sport code MOONSPORT — not cumulative
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