Book Of Sirens Golden Pearl Slot Review
Deep teal water fills every corner of the screen, murky with a green cast and lighter near the surface, wave crests breaking white across the lower half while a gold filigree frame with scrolled corners wraps the reels like an old ornamental picture border. Book Of Sirens Golden Pearl puts almost nothing between you and that sea: a 5×4 grid carrying just 5 paylines, thin enough that nearly all the game’s money sits inside one ten-spin round.
Spinomenal haven’t dressed that up with cascades or ways-to-win mechanics, and the restraint is the point. The game runs at 96.18% RTP and leans on one well-worn formula, the book-style expanding symbol, in a studio catalogue that also includes Book Of Aphrodite, Book Of Rebirth Extreme and Book Of Lucky Jack The Lost Pearl.
Symbols, Paylines and the Scatter Wild
All symbols pay left to right from the leftmost reel, only the highest win on each line is paid, and wins are multiplied by the bet per line. With five lines across twenty symbol positions, plenty of spins land nothing at all.
Two mermaids lead the paytable, and both are unusual in one respect: they pay from two of a kind, where everything below them needs at least three. The green-headdress mermaid is the one worth chasing.
- Mermaid (green headdress): 2 pays 10, 3 pays 100, 4 pays 1,000, 5 pays 10,000
- Mermaid (pink-haired): 2 pays 5, 3 pays 50, 4 pays 500, 5 pays 5,000
- Dragon and Octopus: 2 pays 5, 3 pays 10, 4 pays 100, 5 pays 1,000
- A and K: 3 pays 5, 4 pays 40, 5 pays 150
- Q, J and 10: 3 pays 5, 4 pays 25, 5 pays 100
Because every win is multiplied by the bet per line rather than the total bet, those figures read smaller than they look at first glance. A total bet is spread across all five lines, so the 10,000 top prize is paid per line at the per-line stake. The gap between the mermaids and the rest is steep, too: the green-headdress mermaid’s five-of-a-kind is worth ten times the pink-haired one’s, and a hundred times the royals’ best.
The Wild, a glowing book set around a golden pearl, counts as any symbol and is also the scatter. There’s no separate bonus symbol cluttering the reels; the book does both jobs at once. That doubling shapes the base game, since a symbol that substitutes for everything is also the one that opens the feature door.
Three or more scattered Wilds anywhere on the slot pay on the following scale and trigger the free spins.
- 3 scattered Wilds pay 2x the bet
- 4 scattered Wilds pay 25x the bet
- 5 scattered Wilds pay 250x the bet
The medium symbols matter more than they usually would, because one of them gets promoted at the start of every bonus round. The dragons, octopi and royals filling the middle of the paytable are the pool the wheel draws from, so their values shape what the free spins can actually deliver.
A royal-heavy wheel result means a round built on small multiples. A dragon or octopus result means something with more room to climb, since those symbols pay four figures for a five-of-a-kind.
Free Spins and the Expanding Symbol
Landing three or more scattered Wilds awards 10 free spins, with the bet per line carried over from the triggering game. Before the round starts, a wheel made up of medium symbols only is spun to decide which one becomes the expanding symbol for the whole feature. It’s a small moment of choice-by-luck, and it changes the character of the round depending on what the wheel lands on.
The expanding symbol works after each spin’s result is settled. It expands only where the expansion creates a win, and once expanded it pays across all active lines regardless of whether the winning symbols sit on consecutive reels.
Expanded wins count separately from the original result, so a single spin can pay twice: once for the line wins the reels produced, and again for everything the expansion added. The sequence inside a round runs like this:
- Land 3 or more scattered Wilds in the base game to start the round
- Spin the medium-symbol wheel to set the expanding symbol
- Play through the 10 free spins, with the expanding symbol settling after each result
- Land 3 or more scattered Wilds again to add a further 10 spins
The retrigger is worth the wait when it comes, because another 10 spins means another 10 chances for the already-chosen expanding symbol to distribute well across the four-row grid. Nothing about the round resets on a retrigger; the symbol, the line bet and the remaining count simply carry forward together.
Because the wheel only ever promotes a medium symbol, the round’s best case stops short of the mermaids at the top of the paytable. A full screen of an expanded dragon is the realistic ceiling of the feature, which is still a considerable stack of per-line multiples when the non-consecutive rule is doing its work.
Buying the Feature
A BUY FEATURE button sits in the interface alongside the reels, offering a direct route into the free spins round without waiting on scattered Wilds. The buy runs the same round you’d reach organically: the wheel still spins, the medium symbol pool still applies, and the bet per line carries through as it would from a triggered game.
The expanding symbol mechanic is where the game’s money lives, so paying for immediate access to it is a coherent plan rather than a shortcut for the impatient. The five-line structure tempers it, though. Even a well-distributed expanding symbol round pays across five lines, not twenty-five or a ways-to-win sprawl.
What the feature’s non-consecutive payout rule adds is efficiency per line, not extra lines. The buy inherits the same shape the rest of the game lives under, whatever price the casino attaches to it.
Our Honest Verdict
Overall Rating: 6.9/10
Most of a session here is quiet drifting. Five lines across twenty positions means long stretches where nothing lands, and the siren’s sea, for all its gold framing, is a calm place to wait rather than an eventful one. The reason to sit through it is the round everything feeds: ten free spins where a well-distributed expanding symbol pays across every line wherever it sits.
That’s the strength, and it’s a real one. Because expanded wins ignore adjacency, a good round returns more than the medium-tier paytable looks able to pay, and the retrigger keeps the door propped open. The weakness is everything around that round: the base game offers the wild and nothing else, and there’s no stated ceiling between bonuses to aim at, only the round itself.
For players who like the book formula spare and handsomely painted, this is a calm, well-made example of it. Players who want something happening on every spin have richer waters elsewhere.
Book Of Sirens Golden Pearl FAQs
-
What is the RTP of Book Of Sirens Golden Pearl?
Book Of Sirens Golden Pearl runs at an RTP of 96.18%. -
How many paylines does Book Of Sirens Golden Pearl have?
The game has 5 paylines, with the winning lines paying left to right from the leftmost reel. -
What is the grid size of Book Of Sirens Golden Pearl?
Book Of Sirens Golden Pearl plays on a 5×4 grid, with five reels and four rows of symbols. -
How do you trigger free spins in Book Of Sirens Golden Pearl?
Landing three or more scattered Wild symbols anywhere on the slot triggers 10 free spins. Three Wilds pay 2x the bet, four pay 25x and five pay 250x, with the bet per line staying the same as the triggering game. -
How does the expanding symbol work in the free spins?
Before the round begins, a wheel of medium symbols is spun to choose the expanding symbol. It expands after each spin’s result is settled, but only where the expansion creates a win, and it pays across all active lines whether or not the winning symbols are on consecutive reels. Expanded wins count separately from the original result. -
Can free spins retrigger in Book Of Sirens Golden Pearl?
Yes, the free spins round can retrigger and awards an additional 10 free spins on top of the remaining total. -
Can you buy the bonus on Book Of Sirens Golden Pearl?
Yes, the game offers a Buy Feature option that takes you straight into the free spins round, wheel and expanding symbol included, instead of waiting on scattered Wilds. -
When is Book Of Sirens Golden Pearl released?
Book Of Sirens Golden Pearl’s release date is 6 May 2022.
