- Unlimited free spins
- Players can gamble their winnings
- Expanding symbols
- The design is a little dull
- The Book mechanic could have been improved
Contents
Introduction
Book of Poseidon from game designer Booming Games is an addition to slots involving the Book mechanic. The game plays out on standard 5x3 reels, which generate 10 fixed paylines that pay from left to right.
The game features unlimited free spins, expanding symbols and a gamble feature. Players will see the book symbol acting as both the scatter that triggers free spins and as the wild that substitutes for all other paying symbols other than the expanding symbol. Once the free games mode is operating, a random symbol other than the book will be chosen as an expanding symbol, with up to nine positions on the reels available.
Other than the scatter, which pays, there are four major paying symbols. These are the eponymous ruler of the seas, the Kraken, the dolphin and the turtle. These are supplemented by the usual playing card symbols from ten to ace. The maximum win available in Book of Poseidon is 5,000x.
If you are a fan of this designer’s work, you will find many more Booming Games slots in demo mode here at Slots Temple.
Theme, graphics and soundtrack
We are deep under the ocean in the realm of Poseidon in this offering from Booming Games. The symbols are nicely crafted and stand out on the dark reels set in a gilded frame.
The background is a little disappointing, as it is a static seabed with plenty of underwater plants but no activity in terms of passing wildlife or even the odd bubble.
The soundtrack is an orchestral piece that could frankly belong in any adventure game and adds little to the enjoyment of the slot.
If the theme appeals and you are a fan of this underwater god, why not try the Hoard of Poseidon slot from Red Tiger Gaming? This boasts an RTP of 94.77 per cent and has 30 paylines.

Book of Poseidon RTP and variance
The Book of Poseidon has an RTP of 95.68 per cent, which is a little disappointing in the modern era, and displays high variance. Players will have to be patient during their session when playing this game.
How to play Book of Poseidon
The game is simple to follow but remember that the book acts as both the wild and scatter. Here is a quick ten-point guide to introduce you to the game:
- Once the main screen opens, you will find a menu in the top right-hand corner. Click the information button to find a new screen.
- Start with the game rules for a quick overview of the layout and a brief description of the features.
- Scroll down to see descriptions of the controls.
- Below this is where you will find a description of autoplay and how it can be modified.
- Continue down the screen to see a description of the free games.
- Next you will see how the book operates as both the wild and scatter.
- Finally, check out the gamble feature and the T&Cs.
- Click the paytable to see the free spins and expanding symbols along with a detailed paytable. You will also find thumbnails of the paylines here.
- Click the pile of chips to set your wager.
- Back on the game screen, press + next to the spin button to open a mini menu in which you can engage turbo and maximum bet or autospin, which can be customised.
You are now all set to play. Remember that you can play Book of Poseidon in demo mode here at Slots Temple before you visit an online casino to play for real. If you are looking for the best slot casinos, you can check out our recommendations.
Once playing with your own cash - or even when playing in demo mode - set yourself a budget for each session and play responsibly, leaving the site when the fun begins to wane. Remember that timeouts and self-exclusions are available.
Bet sizes and paytable wins
Bet sizes in Book of Poseidon range from 0.10 to 20. The paytable for five-of-a-kind combinations is as follows:
- Poseidon = 5,000x
- Scatter = 2,000x
- Kraken = 1,600x
- Dolphin, turtle = 600x
- Ace, king = 120x
- Queen, jack, ten = 80x
Book of Poseidon free spins and gamble feature
The scatter symbol triggers eight free spins when three or more appear on the reels. This feature can re-trigger an unlimited number of times. During this phase, random expanded symbols, other than the wild, will appear, up to a maximum of nine.
All wins can be gambled with two options in a card game: predict the colour of a downward-facing card to double your win or the suit for a 4x multiplier.
Book of Poseidon review: our verdict
Fans of the Book mechanic may be a little disappointed with this offering from Booming Games. The 5,000x maximum win is a little disappointing and players may find it just a re-boot of the designer’s Book of Tombs. Booming Games could have tried to upgrade a little using a more sophisticated mechanic and improved the disappointing RTP. The overall design does not offer anything new either.
The high variance will not appeal to everyone, and high rollers may find the options limiting. Players would be best advised to play the game in demo mode here at Slots Temple before deciding whether to visit an online casino and play with their own money.
Disclaimer: Book of Poseidon trademark / license is owned by Booming Games. This site is not endorsed by Booming Games.
| Slot Name: | Book of Poseidon |
|---|---|
| Software: | Booming Games |
| RTP: | 96% |
| Volatility: | High volatility |
| Paylines: | 10 |
| Reels: | 5 |
| Min Bet (all lines covered): | $0.10 (CAD) |
| Max Bet: | $20 (CAD) |
| Top Win: | 5000 |
| Features: | Scatter Symbol, Free Spins, High volatility, 5 Reels |
| Themes: | Sea life |
| Last Update: | 23/02/2022 |
FAQs
What is the RTP of Book of Poseidon?
The RTP is a little disappointing at 95.68 per cent. The industry average is 96 per cent.
Is there a gamble feature?
Yes, there is a gamble feature. You can benefit from a 2x or 4x multiplier for correctly predicting the colour or suit.
Are there free games?
Yes, the scatter triggers free spins when it appears three or more times. This feature can re-trigger an unlimited number of spins.
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