RTP 96.5%
Min bet £0.10
Max bet £100
Max Win 9648
1 UK casinos offer Free Spins for Mysterious
While some slot games rely on noise to create fun, this particular slot creates suspense with silence. The Mysterious Slot by Pragmatic Play pulls you right into a dark, Victorian town, and every spin has an element of danger. Our team here tested it and decided its gothic theme and shifting wilds deserved a closer look. Here, you can play Mysterious for fun in demo mode or visit trusted UK casinos to try it for real with bonuses linked to this dark, elegant release.
Bonus type: Welcome Bonus
Min Deposit: £10
Wagering: 65x
Basic info
Popularity Medium
Min bet £0.10
Max bet £100
Max Win 9648
Gamble Feature No
Layout 4×4
Devices Desktop, Mobile
Configurable Winlines No
Volatility High
Progressive Jackpot No
The Mysterious slot by slot provider Pragmatic Play, with a release date of February 2020, sets a gothic Victorian ghost story theme from the very first spin. The setting resembles a foggy 19th-century English town, where flickering gas lamps and distant thunder create a constant sense of mystery.
The graphics are carefully drawn with the Lord, Lady, and Baron contributing to the game’s macabre tone and presentation. The rich colour palette of dark purples and blues, with sporadic muted grey elements, delivers a unique visual balance that is pleasing to the eye during longer sessions.
The animations are purposeful and clean throughout gameplay. The sound design, which includes the distant howling of wind, low rumbling thunder, and muted orchestral swells, builds tension without appearing distracted.
Next, we discuss the slot’s symbols and bonus features, where the design choices turn into tangible in-game elements.
The Mysterious slot game operates on a setup that rewards players for being patient and observant. The gameplay flow blurs the line between chaotic random Wild features in the base mode and a desirable free spins mode that reshapes the reels and adds multiple payout paths.
The pay structure divides symbols into three categories:
The symbol balance feels deliberate; premiums are hit rarely but deliver solid payout. The three Wild types add variety without clutter, making the pay table steady and rewarding during longer test runs.
Jamie Wall Casino Analyst
Bonus Features
The Mysterious slot bonus features are what define the game’s rhythm and volatility. Each spin has the potential to shift tone through random Wild modifiers or a full bonus entry.
In the base game, three character-linked Wilds bring variety to each round:
Landing three or four Scatter symbols triggers the Free Spins bonus feature, awarding 8 or 12 spins. During this round, the grid expands to 6 reels × 4 rows, unlocking 4,096 ways to win and increasing the slot’s payout potential. Players can choose between two distinct bonus modes:
Both modes directly influence the max win of 9,648 times the stake. This system encourages a balanced strategy, where players choose between multiplier stability and dynamic Wild returns, depending on their play style.
Before moving to the pay table, it’s worth noting that Mysterious keeps its reward distribution clear and steady.
| Symbol | 3 of a kind | 4 of a kind | 5 of a kind | 6 of a kind |
|---|---|---|---|---|
| Game Logo | ×25 | ×50 | ×100 | ×250 |
| Lion | ×10 | ×25 | ×50 | ×100 |
| Owl | ×10 | ×25 | ×40 | ×60 |
| Ram | ×5 | ×15 | ×30 | ×50 |
| Bull | ×5 | ×10 | ×20 | ×30 |
| Heart, Spade | – | ×5 | ×15 | ×25 |
| Diamond, Club | – | ×5 | ×10 | ×20 |
Mysteriouspay table
Next, we explore the gameplay.
The Mysterious slot machine uses a 4×4 grid arrangement during the base game, and winnings happen left to right on adjacent reels, which creates 256 ways to win that are fixed in the grid. The betting range is suitable for a large number of players, ranging from £0.10 to £100 per spin.
The online slot has an RTP of 96.5% and high volatility.
The controls sit below the reels. The plus and minus symbols alter stake levels, and the large Spin icon creates the spin on each turn. Autoplay selects some spins to complete automatically and can stop automatically if certain events occur. Turbo mode speeds up the reel animation, creating shorter spins.
During my test, the controls felt precise and responsive. Bet adjustment was instant, and autoplay ran reliably for longer cycles. I’d suggest this layout for players comfortable with moderate to large bankrolls who prefer methodical play instead of fast cashouts.
Our Gamblizard team spent several sessions analysing how to play Mysterious Slot in both base mode and bonus rounds. The goal was to measure how the game performs across extended playtime and how often the bonus mechanics appear.
I triggered the Lord Wild feature within ten spins, landing a 2× multiplier that lifted a mid-level payout just as the pay table indicates. Multipliers hold the real weight here. After roughly 120 spins, the free spins round was activated, expanding the reels to six with 4,096 win ways. I selected the Locking Multiplier mode, which produced two clock symbols and a ×6 multiplier that locked for extra spins, resulting in a solid payout without reaching the maximum win. Later, I tested the Resurrecting Roaming Wilds option; its shifting Wilds felt less predictable but added a bit more tension and strategic variety.
There’s something genuinely magnetic about Mysterious Slot. The moment we started our test, it pulled us into its fog-covered Victorian streets. Pragmatic Play has created a slot that rewards patience and calculation, not impulse. With a sharp design and a clever mix of random Wilds and free spin choices, it’s the kind of game that appeals to players who want to play Mysterious with intent and rhythm rather than chase constant spins.
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Jamie Wall 
