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 — Casino Ideal review by Evan Carrington
Released in 2020, Mysterious sets a spooky scene across 243 to 4096 ways to win on 4x4 and 6x4 reels. Free spins add more ways to win and multipliers. In the base game, 3 distinct wild symbols bring stacked and spreading wilds, as well as multipliers, to the reels.
Theme and story
Play takes you to 19th-century England, where a Victorian city is gripped by ghostly events and ‘The Lord’, ‘The Lady’ and ‘The Baron’ haunt the reels. Their arrival may seem unsettling, but these characters serve as win features, not just sources of scares.
Graphics, sound and animations
Pragmatic Play sets Mysterious against a dark Victorian cityscape, with a haunted house on a hill, animated lightning, swirling winds and howling wolves. The eerie symbols establish the mood, and feature bonuses bring their own animations, including resurrecting Wilds that are unsettling but useful.
Mysterious combines atmospheric graphics, colour, animation and sound effects to tell a Victorian-era ghost story across the reels.
Top casinos to play Mysterious:
Gameplay
In Mysterious’s base game, spins take place on 4x4 reels with 243 ways to win. Triggering the free spins bonus expands the layout to 6x4 and increases the number of ways to win to 4096.
The base game has 9 standard symbols, which pay for 3- and 4-symbol combinations. In free spins, they can form combinations of 5 or 6 symbols. Any ghost can act as a wild, and ghost wilds may spread stacked wilds, multipliers or additional wilds across the reels.
In the base game and free spins, wins must start with the first symbol on reel 1 and run across consecutive reels from left to right. A combination of 3 symbols therefore appears on reels 1-2-3. Matching symbols on reels 1-2-4 do not pay, since reel 3 is blank.
Controls include volume, quick spins, sound FX, ambient music and battery saver, which reduces animation. ‘Autoplay’ can be set for 10 to 100 automatic spins.
Bonuses and free spins
Random-spin wild modes: The 3 ghosts from the Mysterious online slot appear beside the reels. The currently active ghost selects the wild-symbol feature.
- 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 scatter symbols 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: A gold clock landing during free spins multiplies every win by 12, 9, 6 or 3. If 2 clocks land together, you immediately play a further 2 free spins with the multipliers locked.
- Resurrecting Wilds: During free spins, a Wild symbol that lands fades away and may randomly appear in a new position on a later spin.
Bet sizes, RTP and variance
Bets range from 0.10 to 100.00 per spin. The -/ controls offer ‘Bet’ and ‘Coin Value’ settings. ‘Bet’ runs from level 1 to level 10, with each level playing 10 coins per spin; at level 10, 100 coins are wagered per spin. ‘Coin Value’ ranges from 0.01 to 1.00. Thus, 100 coins at level 10 multiplied by the maximum ‘Coin Value’ of 1.00 gives a maximum cash bet of 100.00 per spin. Mysterious is listed with an expected RTP of 96.5%, and Pragmatic Play rates its volatility at 5 out 5, indicating high-variance gameplay.
Conclusion
Mysterious stands out from many other slots with 4x4 reels that can expand to 6x4 and offer up to 4096 ways to win. The expanded layout, locking multiplier and resurrecting Wild symbols add features to free spins, though each spin’s result remains a matter of chance.
Evan Carrington brings more than 12 years of experience in the iGaming industry, with a focus on reviewing online casinos, assessing slot games and examining player safety. Their work covers casino licensing, RTP, volatility, bonus terms and withdrawal policies. Drawing on practical testing and independent research, Evan provides clear, evidence-based reviews to help players understand gambling platforms, their features and possible risks.
