Game ThemeFantasy |
ProviderGreentube |
VolatilityMedium-high |
RTP95.16% |
Max Multiplier8'076x |
Min Bet0.01 CHF |
Max Bet25.00 CHF |
Book Of Stars sets its story between ancient ruins and a starry sky. The scene is placed at the threshold of a temple with monumental columns, guarded by two massive statues framing the game area. Within this stone setting, the mechanics unfold around a 5x3 grid on 5 reels, featuring a flexible line system that allows up to 25 activatable paylines per spin. The atmosphere alternates between stargazing and archaeological exploration, reflecting the dual imagination of the title: the book and the stars.
The core mechanics use a “classic” structure energized by a central symbol: the Book of Stars. This symbol has a triple role that defines the game’s identity: Wild (joker), Scatter (trigger), and autonomous payout icon. On one hand, it substitutes regular symbols to complete alignments on active paylines; on the other, it triggers a 10 free spins bonus whenever 3 or more Books appear on screen. It also has a unique rule: its own combinations count anywhere on the reels without line restriction, with amounts reaching up to 400,000 coins.
The theme features celestial and mythological figures. A portrait of an explorer serves as a strong visual anchor, flanked by elements connecting the night sky and scholarly quest: Helios, the Sun god, the personified night, an — sometimes depicted with mechanical features — and of course the Book of Stars. This mix of astronomy, antiquity, and steampunk touches gives the game a hybrid feel, both erudite and fantastical.
Underneath, the dynamics of Book Of Stars rely on precise mechanisms. The paylines can be reduced or extended up to 25 to structure alignments; regular symbols behave conventionally, while the Book occupies a special role, even in the bonus: a “mirror” selects a special symbol which becomes expanding and stretches across the reel to amplify the outcome when win conditions are met. Finally, the game includes a Gamble feature of the “lose or double” type based on a red/black draw, available after a modest win.
The setting combines the majesty of ancient architecture with the depth of a star-studded sky. The two colossal statues frame the grid like guardians of a sanctuary, while the top of the screen displays constellations and stars. The astral-inspired background is paired with golden ornamentation on the symbols, giving a strong visual density. The palette is rich, enhanced by colored paylines that snake across the grid and highlight alignment structures.
The visual style navigates between the classical — stones, columns, mythological figures — and more industrial touches: steampunk details are noticeable, especially around the owl, gaining prominence in this nocturnal universe. This hybridization provides a recognizable signature: a traditional artistic base, revisited with mechanical and astronomical inserts.
The animations emphasize symbol readability and highlight key moments: Book appearances, alignment emphasis, expansion of the special symbol during the bonus. The result is a dense scene — chromatic effects, gold accents, line tracings — where each spin foregrounds the interplay between celestial elements and archaeological iconography.
The aesthetic clearly prioritizes visuals: temple, statues, constellations, and gold details set the atmosphere. The audio dimension is not highlighted here; the narrative relies primarily on graphic cues and celestial iconography to guide key moments.
The technical structure relies on a clear foundation. The 5x3 grid and up to 25 activatable paylines provide a stable base, enhanced by a flagship symbol — the Book of Stars — which condenses multiple rules: Wild, free spin trigger, and autonomous payout icon anywhere on the grid. In addition, there is a 10 free spins bonus with a special symbol selected by a “mirror”, and a Gamble feature of the “lose or double” type.
| Element | Details |
|---|---|
| Grid and Reels | 5 reels arranged in a 5x3 grid, showing 15 symbols per spin. |
| Paylines | Flexible configuration with up to 25 activatable paylines per spin. |
| Visual Frame | Temple ruins with giant columns, lateral statues, constellations, and starry sky above. |
| Reference for Wins | Classic combinations on paylines can reach up to 40,000 coins depending on aligned icons. |
| Aspect | Function |
|---|---|
| Substitution (Wild) | The Book substitutes regular symbols to complete or extend alignments on active paylines. |
| Trigger (Scatter) | With at least 3 Books on screen, the game awards 10 free spins. Positions can be scattered. |
| Autonomous Payouts | The Book pays anywhere on the reels (no line required) for 3, 4, or 5 occurrences, with values up to 400,000 coins. |
| Phase | Details |
|---|---|
| Trigger | 3+ Books on screen trigger 10 free spins. Win formation rules reflect those of the base game. |
| Special Selection | At the start of the bonus, a “mirror” selects a special symbol for the session. |
| Expansion | When the designated symbol appears in sufficient quantity to validate a win, it expands across the entire reel, increasing the total win for that spin. |
| Bet Settings | The bet value remains unchanged during the entire free spins sequence. |
| Aspect | Function |
|---|---|
| Access | Offered after a small win. |
| Mechanic | Red/black challenge inspired by “lose or double”. Binary result based on a hidden card. |
| Nature | Optional feature, separate from paylines, Wild, and free spins. |
Book Of Stars delivers a clear proposition: a 5x3 grid with up to 25 activatable paylines for structure, a multifunction Wild as pivot, a 10 free spins bonus enhanced by an expanding symbol, and a Gamble feature as a standalone element. The balance between theme and mechanics relies on the centrality of the Book, which assumes three responsibilities rarely combined with such clarity: substituting, triggering, and paying without line restrictions. Its ability to pay anywhere on the reels gives it a unique status, reinforced by dedicated values reaching up to 400,000 coins.
Visually, the meeting of an ancient temple and a star map serves as a guiding thread. Constellations above, statues and columns around, and rich golden ornamentation on symbols establish an immediately recognizable identity. Some steampunk touches — especially around the owl — add interesting depth to the celestial aesthetic. The grid may seem busy due to the colored paylines crisscrossing the screen and golden decorations, but this deliberate “excess” creates a precise visual signature: a rich tableau where the eye quickly finds its bearings thanks to the Book and key figures.
In terms of similarities, Book Of Stars belongs to the “Book of” lineage built around an expanding symbol during free spins: a structure found in titles like Book of Ra and its variants (Book of Ra Deluxe, Book of Ra 10 Deluxe). Commonalities are evident: a 5-reel grid, a Book with a central role, and a bonus that chooses a symbol to expand across the reel. Differences lie in atmosphere and execution details: here, the path follows constellations and a cosmic temple, whereas other variants favor Egyptian imagery. The ability in Book Of Stars for the Book to pay anywhere is also a notable distinctive feature compared to some related titles.
In another regard, a comparison with Stars Awakening by Playtech revolves around the stellar theme. Convergences are seen in the use of celestial iconography and the importance of the night sky as a backdrop. Divergences appear in the mechanics: Book Of Stars emphasizes a unique Wild/Scatter at the heart of its engine and expanding-symbol free spins, while other astral-themed games explore different approaches (segmented bonuses, structural variations, cascade effects, etc.).
The repertoire of Book Of Stars remains very readable: a proven 5x3 base, up to 25 paylines, a Book of Stars combining Wild, trigger, and anywhere payouts, a 10 free spins bonus with mirror selector and symbol expansion, all complemented by a red/black Gamble. On this foundation, the art direction adds a unique finish by combining visual archaeology, solar mythology, and a star map, with some mechanical touches for depth. In short, a coherent proposition: a clear technical base, a strong central symbol, and a cohesive theme linking ruin exploration and star observation.
What is the central symbol and its role?
The Book of Stars combines three functions: Wild (substitute), free spins trigger, and a symbol that pays anywhere, without line restrictions.
How do you trigger free spins?
Get at least three Books anywhere on the screen; positions can be scattered. Wins follow the base game rules.
What does the mirror do during free spins?
At the start of the bonus, a mirror selects a special symbol: if it can form a win, it expands across its reel to amplify the result.
Are the paylines adjustable?
Yes, their number is flexible up to 25 and can be adjusted each spin. The grid displays 15 symbols per spin.
Is there a “lose or double” option?
Yes, a red/black challenge after a small win: binary outcome to double the amount or lose it, optional feature.
OL-AGG-20191217-005
