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Hall of the Mountain King (Quickspin) – Review & Demo Play
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Hall of the Mountain King - Game Overview
As a 5x3, 20-payline Quickspin slot, Hall of the Mountain King marries a fantasy troll saga with Grieg's iconic score. I play from 20p to £100 a spin, with stacked wilds, a Multiplier Meter in the base that climbs to x5, and a progressive Free Spins bonus split across three levels. It looks slick and feels punchy, and the top prize sits at 7,326x. First sessions can feel busy, yet once the mechanics click, the rhythm of upgrades and wild drops keeps me engaged.
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Hall of the Mountain King Online Slot Theme
The theme tracks the tale of the troll king, and the game times its pace to the famous build-up. Outside, reels spin on a bright hilltop; in free spins, you head inside the cavern with heavier drums and faster phrases. The art hits that fantasy look without clutter. Animations sell the hammer blows that crack blocks on the meters, so progress feels physical. I rate the pairing of visuals and soundtrack highly; it sells the escalation better than most fantasy slots.
I've run it on desktop and mobile without hiccups. Symbols read cleanly at smaller sizes, and the audio still lands. Autoplay and a quick spin option help speed longer grinds, though I prefer pacing the base to watch for wild stacks. The shift from open skies to the hall sets up the bonus well, and the music's crescendo in level three gives those last three spins a proper finale at the end.
What is the RTP of Hall of the Mountain King?
RTP sits at 96.29% with high volatility in my experience. The base can dry up, then a single stacked-wild hit with x3-x5 multiplier can change the balance fast. Free spins carry the real ceiling thanks to upgraded symbols and x15 multipliers. Max win is 7,326x, and I've seen solid spikes around 200x-500x when the Whirling Wilds drop well. Stake flexibility from 20p to £100 suits testing and then stepping up if the session flows.
Meet the Hall of the Mountain King Symbols
Top symbol is the Mountain King, paying 40x for five of a kind. Then come the Troll Queen at 20x, the female troll at 15x, the male troll at 10x, and the orc at 7.5x. The wild carries the same 40x top rate and substitutes across the board. Five wilds line up rarely, yet stacked appearances lift the hit rate for mixed wins, especially with a live multiplier in play.
Lows are card suits, paying roughly 2.5x to 6.25x for five. During level one of the bonus, low symbols can be removed and replaced by stacked premiums via the Symbol Upgrade, which sharpens the paytable nicely by the time you reach the later stages. I track which highs are stacked before the Whirling Wild Drop, as pairing those with a double-digit multiplier is where the bonus swings most of all.
Hall of the Mountain King Symbols and Paytable
| Symbol | Quantity | Payout |
|---|---|---|
| 5 | x40 |
| 4 | x7.5 | |
| 3 | x2 | |
| 5 | x40 |
| 4 | x7.5 | |
| 3 | x2 | |
| 5 | x20 |
| 4 | x5 | |
| 3 | x1.25 | |
| 5 | x15 |
| 4 | x4 | |
| 3 | x1.25 | |
| 5 | x10 |
| 4 | x2 | |
| 3 | x0.75 | |
| 5 | x7.5 |
| 4 | x1.5 | |
| 3 | x0.75 | |
| 5 | x6.25 |
| 4 | x1.25 | |
| 3 | x0.5 | |
| 5 | x4 |
| 4 | x1.25 | |
| 3 | x0.25 | |
| 5 | x4 |
| 4 | x1.25 | |
| 3 | x0.25 | |
| 5 | x2.5 |
| 4 | x1 | |
| 3 | x0.25 | |
| 5 | x2.5 |
| 4 | x1 | |
| 3 | x0.25 | |
|
Scatter | |
How to Win at Hall of the Mountain King Slot
Wins land with three or more on a payline from the left. I watch for wild stacks because each wild in view steps the Multiplier Meter: one to five wilds gives x1 to x5 in the base. That means even small five-line hits can add up when multiple wilds land. Timing matters in free spins; banking upgrades first, then collecting Whirling Wilds, sets up level three. I stop chasing if I miss upgrades early, as the drop phase needs both pieces.
Hall of the Mountain King Free Spins and Bonuses
Free spins trigger via three hammer scatters on reels two to four. Level one focuses on Symbol Upgrade. Each winning spin, or at random, the troll smashes a stone on the upgrade meter, removing a low and adding stacks of the mapped premium. He can also break the bottom of the Multiplier Meter to raise all values, up to x15 in the feature. Clearing the top block advances you onward.
Level two collects Whirling Wilds. When a whirling block breaks, the wilds fly up and wait above the reels. You can hold up to six. The multiplier track still upgrades here, so I'm happy to trade one dead spin for a higher band if it sets the finale. As with level one, breaking through the stack of stones pushes you to the last stage with a better multiplier in place.
Level three drops your stored Whirling Wilds over three spins. A random number falls each spin, pairing with your upgraded symbols and current multiplier. This is where games spike: stacked premiums plus four or more wilds can fill multiple lines. It's brief, but the music ramp and tumbling wilds make those spins tense. I've had quiet finishes too, which is part of the swing and a bit of luck too.
Overall Review – Hall of the Mountain King Slot
Hall of the Mountain King is ambitious, and the layered bonus keeps me coming back. The base has enough pop thanks to stacked wilds and multipliers, and the three-level journey adds character rather than feeling like padding. It can be confusing on a first go, yet after a few rounds the flow makes sense, and those upgrade choices feel meaningful once you've seen each stage trigger a couple of times.
I'd tag it for players who enjoy high variance and a strong soundtrack driving the pace. Sessions can be swingy, but the 7,326x top end and the x15 path give it teeth. I treat it with a sensible stake, build a feel for the meter timings, and push only when the upgrades land. When it clicks, it's a ride. Worth a practice run to map the levels and pacing first.
Gallery of video and screenshots of the game
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Mark Rylance
Editor in Chief and Developer – AllSlotsOnline.Casino
Gambling is one of my main passions in life and I strive to help players find the best place to relax and get excited about gaming.
Last updated 07.12.2025 by Mark Rylance