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Book of Helios (Betsoft) – Review & Demo Play
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Book of Helios Slot Review: Features, RTP and Free Spins
I took Book of Helios for a spin from Betsoft, a Greek mythology slot starring Olivia Brave. It runs on a 5x3, 10-line layout with a 95.58% RTP and high volatility. The big draw is the free spins round with a random expanding symbol and multipliers on the Book wilds. There’s also a bonus buy that jumps straight to the feature for 65.5x stake. It’s a classic ‘book’ formula with a fiery twist and serious win potential up to 20,168x.
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Book of Helios Key Information
I logged sessions across mobile and desktop and noted the core numbers. Book of Helios is a 5x3 slot with 10 fixed paylines, bets from 0.10 to 20 per spin, and a published RTP of 95.58%. Volatility sits on the high side, with a hit rate around 35.03% quoted in the casino lobby. Max exposure reaches 20,168x bet, and a bonus buy is available. The game launched on 30 June 2022 under the Betsoft banner.
Its mechanics are straightforward. All 10 lines stay active, wins pay left to right, and matching two to five symbols can land a payout depending on the icon. The Book symbol doubles as wild and scatter, appearing on reels two, three, and four in the base game. There are no cascades or side gambles, but autoplay runs up to 100 spins with stop limits. Performance is slick on iOS and Android browsers with responsive controls and crisp visuals.
Book of Helios Game Play
Game play in Book of Helios drops you into a Greek temple setting, all firelit columns and a bold score. Olivia Brave stands ready by the reels, while Helios themes run through the artwork. Animations feel tight and the interface is lean, so taps and spins respond cleanly. On mobile, textures hold up well and the browser version kept a steady frame throughout my sessions, which suits longer grind streaks common to this style of slot.
In the base game, the Book landing on the middle reels carries a lot of weight. It subs to complete lines and sets up the main feature when three hit together. There are no cascades or nudges to break the rhythm, so you’re banking on line hits and timing. The real spike arrives in free spins where expanding symbols can pay across reels and Book multipliers of 1x to 5x swing outcomes sharply.
How to Play Book of Helios
I start by setting the stake with the plus and minus buttons, anywhere from 0.10 to 20 per spin. With 10 fixed paylines, you don’t tweak lines, so it’s about bankroll sizing and spin pace. Wins register from the leftmost reel, and some picture symbols pay from two of a kind. The info icon opens the paytable and line diagrams, handy for checking symbol tiers and how combinations line up.
Then hit Spin or set up autoplay for up to 100 rounds with stop limits for wins or losses. In the base game, keep an eye on reels two to four, as the Book appears there to sub as wild. Land three Books at once to enter free spins. Sound and music can be toggled in settings if you prefer a quieter session while you hunt for the expanding pick.
Symbols and Paytable in Book of Helios
Symbol-wise, Book of Helios mixes myth icons with the feature driver. Helios, Olivia Brave, and treasure imagery headline the picture pays, while the Book is both wild and scatter. Line wins land from two to five matching symbols depending on the icon, across 10 fixed paylines. In free spins, a randomly chosen symbol becomes expanding, paying on any reel positions once enough instances appear. The Book only shows on reels two, three, and four in the base, then expands during the bonus.
Book of Helios Symbols and Paytable
| Symbol | Quantity | Payout |
|---|---|---|
| 5 | x20 |
| 4 | x10 | |
| 3 | x5 | |
| 2 | x2 | |
| 5 | x15 |
| 4 | x8 | |
| 3 | x3 | |
| 2 | x1 | |
| 5 | x10 |
| 4 | x5 | |
| 3 | x2 | |
| 2 | x0.5 | |
| 5 | x10 |
| 4 | x5 | |
| 3 | x2 | |
| 2 | x0.5 | |
| 5 | x8 |
| 4 | x3 | |
| 3 | x1 | |
| 5 | x6 |
| 4 | x2 | |
| 3 | x0.5 | |
| 5 | x6 |
| 4 | x2 | |
| 3 | x0.5 | |
| 5 | x5 |
| 4 | x1 | |
| 3 | x0.2 | |
| 5 | x5 |
| 4 | x1 | |
| 3 | x0.2 | |
|
Scatter, Wild | |
Book of Helios Features and Bonuses
The Book acts as wild and scatter. In the base game it substitutes on reels two, three, and four to complete line hits. Land three Books together and you trigger 10 free spins. Before the round starts, a symbol is randomly chosen to act as an expanding pick. When enough instances land to pay, that symbol expands to fill its reels and pays across positions, not bound by the usual line rules.
During the feature, any Book that lands can expand and reveal a multiplier from 1x to 5x. That value applies to wins it helps create, giving a strong lift to expanding symbol outcomes when books line up with the chosen icon. In some builds referenced by casino lobbies, the bonus can retrigger by landing three Books again, adding more spins to keep the round rolling when the grid is already primed.
If you prefer skipping the wait, the bonus buy costs 65.5x your current bet and starts free spins immediately. In higher variance sessions, this shortcut can be handy for testing the expanding symbol plus Book multiplier mix without grinding the base. There is no jackpot, side gamble, or extra mini-game beyond this feature set, so the slot leans on its ‘book’ core and the 20,168x ceiling to carry the excitement.
Final Verdict – Should You Play Book of Helios?
I rate Book of Helios as a strong pick if you like high volatility and a classic ‘book’ engine with a twist. The 95.58% RTP sits a touch below many slots, yet the combination of expanding symbols, Book multipliers, and the bonus buy gives solid punch. I’d point new starters to demo first, while seasoned players will enjoy the sharp visuals and the 20,168x top end. When the expanding pick lands with multipliers, it can go properly heavy.
Gallery of video and screenshots of the game
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Mark Rylance
Editor in Chief and Developer – AllSlotsOnline.Casino
Gambling is one of my main passions in life and I strive to help players find the best place to relax and get excited about gaming.
Last updated 10.12.2025 by Mark Rylance