Book Of Diamonds Reloaded Slot Review
Red and orange light bursts from behind the reels like a sunrise caught mid-explosion, with cut-diamond ornaments glittering either side of the title and a gold-trimmed frame on a dark, reflective floor. It’s a lot of theatre for five paylines, and that mismatch is the honest read of Spinomenal‘s Book Of Diamonds Reloaded: a 5×3 grid, five fixed lines and a 96.18% RTP, dressed in more neon than the maths underneath really needs.
The format argues for itself, though. Fewer lines mean each one carries more weight, and the paytable goes where most book slots don’t dare: the top symbol pays 200,000x the total bet. Spinomenal’s book bench runs deep, from Book Of Aphrodite to Book Of Titans and Book Of Panther, and this is the stripped-back end of it.
The Base Game and Its Five Lines
Five fixed lines is the whole structure. 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. There’s no choosing your lines and no ways mechanic underneath – just five straight paths across the reels.
Every win in a round lands in the WIN field, and that’s the extent of the ceremony. The Wild is the Book of Diamonds itself, and it substitutes for any symbol while also acting as a scatter. Three or more scattered anywhere pay 2x, 25x or 250x the total bet for three, four or five respectively, and trigger the free spins round. Bet per line carries over into the feature unchanged.
The paytable is a classic fruit-and-diamond ladder, and with only five lines the gaps between tiers do all the work. Values are multiples of the total bet:
- Diamond – 2: 200x, 3: 2,000x, 4: 20,000x, 5: 200,000x
- 7 – 2: 100x, 3: 1,000x, 4: 10,000x, 5: 100,000x
- Bell – 2: 100x, 3: 200x, 4: 2,000x, 5: 20,000x
- Bar – 2: 100x, 3: 200x, 4: 2,000x, 5: 20,000x
- Watermelon – 3: 100x, 4: 800x, 5: 3,000x
- Plum – 3: 100x, 4: 800x, 5: 3,000x
- Orange – 3: 100x, 4: 500x, 5: 2,000x
- Lemon – 3: 100x, 4: 500x, 5: 2,000x
- Cherry – 3: 100x, 4: 500x, 5: 2,000x
Two symbols paying from a pair keeps short spins alive. The fruit tier pays the same three-of-a-kind values as the melon tier, and the real jumps only arrive at four and five of a kind. The Diamond’s 200,000x figure looks spectacular on paper; on five lines, five-of-a-kind appearances are correspondingly rare.
The symbols divide into medium and low tiers, and that split matters more here than in most games, because the medium tier is what feeds the free spins wheel. The low symbols fill out the bottom of the ladder; everything the wheel can land on comes from the band above them.
Free Spins, the Wheel and the Expanding Symbol
Three or more scattered Books award 10 free spins and then hand you a wheel. The wheel is stocked with medium symbols only, and one spin of it decides which of those becomes the expanding symbol for the whole round. It’s a small piece of agency in a format that usually just assigns the symbol at random.
The round runs in a fixed order:
- Land three or more scattered Books anywhere on the reels
- Collect the scatter pay, then spin the wheel to select the expanding symbol
- Play the 10 free spins at the same bet per line as the triggering game
- The expanding symbol widens any winning result, paying on top of the line wins
- Three more scattered Books at any point add another 10 spins
Once each free spin’s result is settled, the expanding symbol fills its reels to form new paylines on top of the existing ones. The expansion only happens when it will produce a win, and the expanded symbol 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.
That double count is where the round’s real leverage sits. A full screen of the chosen symbol doesn’t need to land consecutively to pay, and because the wheel only offers medium symbols, the expanding symbol is never a bottom-tier fruit. During the feature the bet controls are disabled, so the stake you triggered with is the stake you keep.
Controls: Auto Play and Turbo
Auto play runs continuous spins at your chosen bet per line, with a configuration screen for the number of spins and a pause button to stop. Turbo Mode shortens each round to the shortest possible game time – toggled by the rabbit button on desktop or through the settings menu on mobile, and it can also be switched on from the auto play configuration screen.
Buy Feature
The Buy Feature skips the waiting and starts the free spins round on demand. It works like this:
- Clicking the button opens a window where you can modify the bet for the round you’re buying
- The buy price is set according to that bet
- Paying the price triggers the free spins round straight away
It’s a direct route to the only feature the game has, and the price scaling with your chosen bet keeps it straightforward. The ceiling is the paytable’s top row: five Diamonds at 200,000x the total bet, the richest combination the board can produce.
Our Honest Verdict
Overall Rating: 7.1/10
You come to this one for the same reason you’d pick a diamond over a fistful of costume jewels: it does fewer things, and the one thing it does is cut deep. Sessions sit somewhere between fruit-machine trance and long waits for the wheel, and the neon frame does its best to paper over the gaps.
The wheel-picked expanding symbol is the game’s best idea, because a medium-tier symbol that pays on all five lines without needing consecutive reels can turn one spin into two wins. The flat base game is the weakness – between triggers there’s little to do but watch fruit land, and the 200,000x top figure sits a very long way from most sessions.
This suits anyone who likes the book format boiled down to a single feature and doesn’t mind waiting for it. Anyone who wants modifiers, minigames or layers won’t find them under the glow. For five lines and one good bonus round, it still catches the light.
Book Of Diamonds Reloaded FAQs
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What is the RTP of Book Of Diamonds Reloaded?
The RTP is 96.18%. -
How many paylines does Book Of Diamonds Reloaded have?
The game runs on five fixed paylines. You can’t adjust the number of lines; all five are always active and wins pay left to right from the leftmost reel. -
What is the grid size of Book Of Diamonds Reloaded?
It’s a 5×3 grid – five reels and three rows. -
How do you trigger free spins in Book Of Diamonds Reloaded?
Land three or more scattered Book symbols anywhere on the reels. Three Books pay 2x your total bet, four pay 25x and five pay 250x, and all of them award 10 free spins. -
Can the free spins round retrigger?
Yes. Landing three or more scattered Books during the round awards an additional 10 free spins, with the same expanding symbol and bet per line as the triggering game. -
How does the expanding symbol work during free spins?
Before the round starts, a wheel of medium symbols is spun to pick one expanding symbol. After each free spin’s result is settled, that symbol expands across its reels to form new paylines – but only when the expansion creates a win. Expanded wins pay on all active lines and count separately from the original result. -
Can you buy the bonus on Book Of Diamonds Reloaded?
Yes. The Buy Feature purchases the free spins round outright and starts it immediately. A window lets you set the bet for the round, and the buy price is set according to that bet. -
Who makes Book Of Diamonds Reloaded?
Spinomenal. Book Of Diamonds Reloaded’s release date is 20 January 2022.


