RTP
96.5%
Minimum bet
0.10
Slot Type
Video slots
Volatility
High
Reels
5
Progressive jackpot
No
Popularity
Maximum bet
100
Provider
Pragmatic Play
Bonus features
Yes
Paylines
243
Theme
Victorian
Mysterious online slot game — Al Buraq Regina review by Evan Carrington
Launched in 2020, Mysterious brings a ghostly theme to 243 reels, with up to 4096 ways to win on 4x4 and 6x4 reels. Free spins add extra winning ways and multipliers. In the base game, 3 different wild symbols can introduce stacked wilds, spreading wilds and multipliers.
Theme and story
The game transports you to 19th-century England, where ghostly events take over a Victorian city and ‘The Lord’, ‘The Lady’, and ‘The Baron’ haunt the reels. Their appearances may be unsettling at first, but these characters serve as win features, not just scares.
Graphics, sounds and animations
Pragmatic Play gives Mysterious a shadowy Victorian city setting, complete with a haunted house on a hill, animated lightning, swirling winds, and howling wolves. The eerie reel symbols set the tone and trigger different animations when bonus features appear, including resurrecting Wilds that are spooky but useful.
Mysterious combines atmospheric graphics, color, animation, and sound effects to tell a Victorian-era ghost story across the reels.

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Gameplay
In the base game, Mysterious plays on 4x4 reels with 243 ways to win. Trigger the free spins bonus to expand the layout to 6x4 and increase the total to 4096 ways to win.
The base game features 9 standard symbols, which pay for 3- and 4-symbol matches. In free spins, they can form wins with 5 or 6 matching symbols. Any ghost may act as a wild, and ghost wilds can bring stacked wilds, multipliers or spreading wilds to the reels.
Wins in the base game and free spins must start with the first symbol on reel 1 and extend across consecutive reels from left to right. A match of 3 symbols on reels 1-2-3 qualifies, but matching symbols on reels 1-2-4 do not, since reel 3 has no symbol.
Controls include volume, quick spins, sound effects, ambient music, and battery saver, which reduces animation. ‘Autoplay’ can be set for 10 to 100 automatic spins.

Bonuses and free spins
Random wild-symbol modes: The 3 ghosts shown beside the Mysterious slot reels indicate which wild feature is currently active.
- The Lord: Multiplies completed wins by x2 or x3
- The Lady: Expands into a mystery stack of symbols
- The Baron: Spreads across adjacent reels, adding more Wilds
Free spins: Landing 3 or 4 free-spin scatters awards 8 or 12 free spins, respectively. The reels then change to 6x4, with 4,096 ways to win and 2 extra features.
- Locking multiplier: During free spins, a gold clock can land and multiply all wins by 12, 9, 6 or 3. If 2 appear at once, 2 more free spins are played immediately, with the multipliers held in place.
- Resurrecting Wilds: During free spins, a Wild fades away after landing, then randomly reappears in another position on a later spin.
Bet sizes, RTP and volatility
Bets range from 0.10 to 100.00 per spin. The -/ controls offer ‘Bet’ and ‘Coin Value’ settings. ‘Bet’ ranges from level 1 to level 10, with each level playing 10 coins per spin; level 10 therefore wagers 100 coins per spin. ‘Coin Value’ ranges from 0.01 to 1.00. So, 100 coins at level 10 multiplied by the maximum ‘Coin Value’ of 1.00 results in a maximum cash bet of 100.00 per spin. Mysterious is listed with an expected RTP of 96.5%. Pragmatic Play rates its volatility at 5 out of 5, indicating high-variance gameplay.
Conclusion
Mysterious differs from many slots with its 4x4 reels, which can expand to 6x4 for up to 4096 ways to win. The larger layout, locking multiplier, and resurrecting Wilds add features during free spins, though every spin’s result remains a matter of chance.
Evan Carrington brings more than 12 years of experience in the iGaming industry, specializing in online casino reviews, slot game analysis, and player safety assessments. Their expertise includes casino licensing, RTP, volatility, bonus terms, and withdrawal policies. Combining hands-on reviews with independent research, Evan provides clear, evidence-based coverage to help players understand gambling platforms, their features, and possible risks.




