Book Of Admiral Slot Review
A moonlit swell breaks along the left edge of the reels and rigging ropes fan across the dark, but the real story on this deck is a number: 97.05% RTP is more than most book slots will ever offer you, and it’s the strongest reason to sail with this one rather than the fleet of near-identical rivals. Amatic have set their admiral loose on a 5×3 grid with 10 paylines and high volatility, and the payout rate alone makes it an arguable pick in a format that usually pays less for the same experience.
It’s the same book chassis as Book Of Montezuma, and the studio runs that shape through Grand Wild Dragon and Lucky Joker 20 Extra Gifts as well. What separates this voyage from the fleet is that RTP, plus a retrigger rule that stacks expanding symbols rather than just spinning longer. Bets run from 1 to 500 per spin.
The Base Game
Ten fixed lines pay leftmost to right on adjacent reels, and only the highest win on each line counts. Wins from different lines add together. Line wins are multiples of the line bet, which keeps the arithmetic simple even when several lines connect at once.
The BOOK symbol does double duty: it substitutes for all symbols as a wild, and it pays as a scatter from any position when three or more land. Because it’s both the wild and the trigger, a spin with three books scattered across the grid pays the scatter rate and opens the bonus at the same time, and the wild side of it can complete line wins it isn’t part of the paytable’s top rate for. The scatter pays aren’t tied to a line at all, which is the one place the game breaks its own leftmost-to-right rule.
Every other value in the game is quoted as a multiple of the total bet, and the ladder from top symbol to royals is steep:
- Admiral – 1x for two, 10x for three, 100x for four, 500x for five
- Ship – 0.5x for two, 4x for three, 40x for four, 200x for five
- Badge/Cannon – 0.5x for two, 3x for three, 10x for four, 75x for five
- A/K – 0.5x for three, 4x for four, 15x for five
- Q/10 – 0.5x for three, 2.5x for four, 10x for five
- BOOK (wild/scatter) – 2x for three, 20x for four, 200x for five
It’s a classic book-shaped economy. Most spins return fractions of the stake, the two-symbol pays on the top three symbols keep small returns ticking, and everything points at the bonus round. The Admiral, his ship and the badge pay the serious money; the royals are filler with modest ceilings.
Two of the top symbols paying from two-of-a-kind is worth a second look, because it isn’t universal in this format. It means a lone Admiral on reels one and two returns the stake, and the same goes for the Ship and the badge. The royals need three, so the difference between a premium hit and a filler hit shows up early in the spin rather than at the end of it.
With 10 lines on a 5×3 grid, the middle reels do most of the connecting work: every line has to pass through reel three, so a stacked middle reel matters more here than on wider layouts. Malfunction voids all pays and plays, as it does everywhere.
Bonus Spins and the Expanding Symbols
The Bonus Spins round is the game’s one feature, and it works like this:
- Three, four or five BOOK symbols anywhere on the grid start the round with 10 Bonus Spins
- One Expanding symbol is chosen at random before the first spin, and it can be any symbol except the BOOK
- Wherever the Expanding symbol lands, it grows to cover its entire reel
- It then pays on all active lines, even when the winning symbols aren’t on consecutive reels
- Each retrigger adds another 10 Bonus Spins and selects one additional Expanding symbol at random
- Up to nine Expanding symbols can be in play; once all of them are used, only the Expanding symbols are counted
That non-consecutive rule is the engine’s sharpest tooth. A single expanded symbol on reels one, three and five still pays the five-of-a-kind rate, because the expanded symbols count on every line they touch. The Admiral as the Expanding symbol is the round’s ceiling: three full reels of him would dwarf anything the base game can produce.
Retriggers change the character of the round rather than just its length. The first ten spins run with one expanding symbol; a retrigger adds a second, then a third, and each new symbol is picked at random from those not yet in use. A round that retriggers three or four times isn’t just longer, it’s denser, with several symbols all capable of covering their reels at once.
The maths behind a full expansion explains why. The Expanding symbol pays according to the standard paytable, but across all active lines at once, so a five-reel expansion of the Ship isn’t one 200x win, it’s 200x multiplied across every line the expanded reels cover. Two expanding symbols landing together compounds it again, and the non-consecutive rule means neither has to sit next to the other to count.
With nine symbols available and the BOOK excluded, the pool of candidates runs from the Admiral down to the Q and the 10. A retrigger that selects a royal adds less than one that selects the Admiral or the Ship, but every addition widens the number of spins on which something can expand. The round plays out until no Bonus Spins remain, and further retriggers can land at any point within it.
There’s no side bet and no buy option; the book and its expanding payload is the whole offer. Stakes are the only lever, and they run from 1 to 500 per spin, so the round arrives when the scatter decides it does and not before.
Our Honest Verdict
Overall Rating: 7.7/10
Most of a session on Book Of Admiral is deck-watching: small line wins, long gaps, and the BOOK scatter as the only thing worth waiting up for. The reason somebody chooses this ship over the many other book slots is value – that 97.05% RTP – plus a bonus that builds rather than just repeats.
The retrigger rule is the best thing here. Each one adds a new expanding symbol, so a lucky round compounds towards nine of them paying across every line at once, which is more than most games in this format ever threaten. The weakness is everything outside that engine: one feature, no buy option, and a base game that offers nothing to do between scatters.
It’s a good fit for players who already like the book format and want the best return on it, and a poor one for anyone after variety in a session. For a patient spinner on a moonlit deck, though, few ships pay better for the wait.
Book Of Admiral FAQs
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What is the RTP of Book Of Admiral?
The RTP is 97.05%, which is above the industry average and notably generous for a high-volatility slot. -
Is Book Of Admiral high volatility?
Yes, Book Of Admiral is a high volatility slot. Wins in the base game tend to be small, with the Bonus Spins round carrying most of the win potential. -
How many paylines does Book Of Admiral have?
Book Of Admiral has 10 paylines, paying leftmost to right on adjacent reels. Only the highest win on each line is paid. -
Can the Bonus Spins round retrigger?
Yes. Every retrigger awards another 10 Bonus Spins and adds one more randomly chosen Expanding symbol, up to nine in total. Once every symbol has been used, only the Expanding symbols are counted. -
What is the minimum and maximum bet on Book Of Admiral?
Bets run from 1 to 500 per spin, giving a wide range for both cautious players and high rollers. -
How do you trigger the Bonus Spins in Book Of Admiral?
The round starts when BOOK symbols land: three, four or five anywhere on the reels begin 10 Bonus Spins. Since the BOOK is also the wild, the trigger and the scatter pays come from the same symbol. -
How does the Expanding symbol work in the Bonus Spins?
One symbol is picked at random when the round begins, and it can be any symbol except the BOOK. Wherever it lands, it grows across its whole reel and pays in every active line, with no need for the winning symbols to sit on adjacent reels. -
When is Book Of Admiral released?
Book Of Admiral’s release date is 4 May 2022, and it was made by Amatic.
