Book of 99 Demo - Play for Free & Slot Review
Slot Setup and Betting Options
- 5 Reels
- 3 Rows
- 3D Graphics
- 04.05.2021 Release Date
- Mobile Version
- £0.10 Minimum Bet
- £100.00 Maximum Bet
- £0.01 Minimum Bet Line
- £10.00 Maximum Bet Line
- 10 Paylines
- Win Both ways
Play the Book of 99 demo for free and see how Relax Gaming's Greek mythology slot plays before you stake.
It runs at an RTP of 99.00% with high volatility and a top win of £1,207,000.
What We Think
Book of 99 keeps things straightforward. Relax Gaming has built a Greek mythology slot that leans on its high variance rather than a stack of side features, so what you see in the base game is close to what you get.
At 99.00% RTP it sits above the 96% mark many players use as a reference point. Trying the free Book of 99 demo is a low-risk way to judge whether the high-variance swings suit your style before you check our guide to the high RTP slot titles.
What Makes Book of 99 Different?
Book of 99 is a more traditional Greek mythology slot, and its appeal is in the clean presentation and the high-variance pacing rather than a single headline gimmick.
If that style appeals, you can play slot machines online to find somewhere to play for real money.
Slot Features
- Multipliers
- Scatters
- Wild symbol
- Free Spins
- Stacked symbols
- Re-spins
- Quickspin
- Gamble feature
- Retriggering
- Bonus Buy
Can You Play Book of 99 for Free?
The free Book of 99 demo on this page runs the full game with no account and no deposit.
The demo is the sensible way to get a feel for the high variance before you commit real money. When you are ready, it is worth comparing the verified uk online casinos list first, and you can also browse more free Greek mythology slots.
How Book of 99 Plays
Book of 99 is a five-reel slot from Relax Gaming. With high volatility, wins land less often but carry more weight, so the bigger moments tend to come from the features rather than the base game.
Stakes run from £0.1 to £100 a spin, so it suits a range of bankrolls.
Book of 99 Bonus Features
Book of 99 keeps its feature set lean. Wilds and the bonus round do the heavy lifting, and there is no sprawling menu of side games to track. If you prefer slots with richer bonuses, you can compare free spins no deposit no wager.
Book of 99 RTP and Volatility
Book of 99 runs at an RTP of 99.00% with High volatility, and the maximum win is £1,207,000.
That return is among the stronger figures you will find and sits clearly above the 96% reference point, though some operators run lower RTP variants, so check the game menu before playing.
The £1,207,000 ceiling reflects the high variance: this is a slot that pays through its features rather than steady base-game wins.
Book of 99 vs Siren Song
Book of 99 and Siren Song make a natural comparison, as both are underwater slots aimed at a similar player.
They share the theme, but the numbers and the studio differ, which is where your choice comes in.
| Feature | Book of 99 | Siren Song |
|---|---|---|
| Provider | Relax Gaming | Truelabs |
| RTP | 99.00% | 96.33% |
| Volatility | High | High |
| Max Win | £1,207,000 | £1,500,000 |
| Theme | Ancient Greece | Ancient Greece |
If those numbers suit you better, try the Siren Song demo.
Who Should Play Book of 99?
Book of 99 is a good fit for:
- Players who like a clean Greek mythology slot
- Players comfortable with high variance and longer dry spells
- Fans of Relax Gaming and the Greek mythology theme
Look elsewhere if you want frequent, low-variance wins. In that case, browse a secure new casino site for a calmer option.
Final Verdict
Book of 99 earns a 8.4 from us. It is a tidy Greek mythology slot, the 99.00% RTP is a strength, and the high variance is the thing to weigh before you play.
For a Greek mythology slot with a big top end, it is worth a spin on the demo first. Players who like the theme should also try the Athens Megaways demo.
Gambling.com Rating: 8.4/10
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Licensing Authorities and Testing Agencies
FAQs
What is the Book of 99 RTP?
Book of 99 has a published RTP of 99.00% with high volatility. Some operators run lower RTP variants, so check the game menu before playing.
Can I play Book of 99 for free?
Yes. The free demo on this page runs the full game with no account or deposit, so you can test the features before staking real money.
What is the maximum win on Book of 99?
The maximum win is £1,207,000, paid mainly through the game's features.
