Book of Ra

Book of Ra

Greentube · Slots · Book of
  • RTP94.26
  • Volatility5
  • Reels5

Expanding scatter symbols in free spins, high volatility, and a max win of 5000x the stake – but the 92.13% RTP is a hard pill to swallow for modern standards. This is the original Book game that refuses to fade.

Book of Ra
Provider Greentube
RTP 94.26%
Variance 5
Reels 5
Release date October 5, 2017

Play this slot Demo Free

No registration. No download. Spin the reels and watch how the expanding symbol mechanic works during free spins before risking real money.

Demo isn’t available for this game yet.

Provider Greentube
Game Type Slots
Series Book of
RTP 94.26
Volatility 5

Where to play this game

BaxterBet Casino

BaxterBet Casino

4.0 / 5 BaxterBet Casino launched in 2025 under Curaçao GCB licensing - delivering 7,787…
Boomerang.bet Casino

Boomerang.bet Casino

4.1 / 5 Boomerang.bet operates as a hybrid gambling hub launched in 2023 - offering…
1xBet Casino

1xBet Casino

4.4 / 5 1xBet Casino launched in 2007 under Curaçao licensing. Features $1 minimum deposits,…

How this slot Pays

The slot runs on a 5-reel, 3-row grid with 9 paylines (all active recommended). Stakes range from €0.01 to €10 per line, meaning total wagers span €0.09 to €90 with all 9 lines engaged. Symbols pay left to right – low cards need 3-of-a-kind to land, while premiums (Scarab, Statue, Pharaoh, Explorer) pay from 2 symbols onward.

The Explorer is the top-paying regular symbol, hitting 5000x the stake for five-of-a-kind. The this slot itself is both Wild and Scatter, substituting for any symbol in winning combos and triggering the bonus when 3, 4, or 5 land anywhere. Landing books also pays cash: 2x, 20x, or 200x the stake depending on count.

Symbol Payouts
10 / J / Q 3, 4, or 5 pay 5x, 25x, or 100x line bet
K / A 3, 4, or 5 pay 5x, 40x, or 150x line bet
Scarab 2, 3, 4, or 5 pay 5x, 30x, 100x, or 750x line bet
Statue 2, 3, 4, or 5 pay 5x, 30x, 100x, or 750x line bet
Pharaoh 2, 3, 4, or 5 pay 5x, 40x, 400x, or 2000x line bet
Explorer 2, 3, 4, or 5 pay 10x, 100x, 1000x, or 5000x line bet

Free Spins / Expanding Symbols

Base game is flat. Free spins is where the teeth show up. Trigger 3+ Books and the slot awards 10 free spins to start. Land more Books during the feature and gain +10 spins per hit – retriggers keep rolling.

Here’s the mechanic: before free spins kick off, one regular symbol is chosen at random to become the expanding symbol for the entire feature. When that symbol lands, it expands to fill the entire reel. Expanded symbols pay across all active paylines at once and act as scatters – they don’t need to sit on adjacent reels. This is the engine. A Pharaoh or Explorer expansion can pivot a thin spin into a 70x or 100x+ win in one moment.

The sample session in the donor review caught free spins twice in 200 spins: first with Pharaoh chosen (no expansion, 44x payout), then Statue selected (expansion hit, 70x total). The variance is real – long droughts between bonuses are the norm.

RTP / Volatility / Max Win

this slot carries a 96% RTP as the headline figure. However, Greentube also offers a lower tier at 92.13% RTP – the version most widely available online. That 92.13% is well below the modern 96% standard and stings when stacked against fresh releases. High volatility means payouts are infrequent but can spike hard. The ceiling is 5000x the stake from a five-of-a-kind Explorer, though realistic free spins wins cluster in the 40x-100x range.

Hit frequency sits at 28%, meaning roughly 1 in 3-4 spins lands a win. Long stretches of dead spins are common – patience is mandatory.

Theme / Visuals

Ancient Egypt, adventure, hidden tombs. The explorer character borrows heavily from Indiana Jones. Symbols include traditional Egyptian iconography – scarabs, statues, pharaohs – mixed with low-paying card ranks. Dated graphics and retro arcade sound effects are the trade-off for a game released over a decade ago. If fresher visuals matter, the official sequels (Deluxe, Magic, Golden this slot) modernize the package while keeping the core mechanic intact.

Mobile Play

this slot is fully optimized for mobile. Android, iOS, desktop – all platforms work seamlessly. Play via dedicated casino app or mobile browser (Safari, Chrome, etc.) without download friction.

Strategy / Session Management

Volatility is the boss here. Long stretches without payouts are baked into the math. Most big wins emerge from free spins, not base game grinds. Lower stakes extend session length while waiting for the bonus. Stick to regulated casinos to ensure you’re playing the true version under proper conditions. Demo first – there’s no reason to risk real money until you’re comfortable with the rhythm.

Ante / Super Spin / Buy Feature

Special Bets and Buy Feature costs:

Feature Cost Effect
realistic free spins wins can hit 70x 100x + Mobile-friendly across all devices RTP6% (common online version) is brutal vs. modern 96%
free spins is genuinely clever and can deliver 70x 100x + wins when it fires. But the 92.13% RTP (common online version) is a brutal pill – well below moder

Bonuses

  • 1xBet Welcome Bonus

    Welcome Bonus Package · Up to €1500 total across 4 deposits · 150 free spins across the package free spins

    Promo code
    Claim bonus
  • BC.Game Casino Welcome Bonus

    Casino Welcome · up to 360% · Rakeback-based

    Four-tier crypto package with 180–360% matches and 40–140% rakeback. Bonus unlocks gradually via real-money wagering.

    Claim bonus
  • Ivibet Casino Welcome Bonus

    Welcome Package · up to €300 · 170 FS

    Two-tier match requiring a €20 minimum deposit per stage. 40xb rollover applies.

    Claim bonus

Pros

  • Pioneered the Book slot genre - still the reference point after 15+ years
  • Expanding symbol mechanic in free spins creates genuine win potential
  • Max payout of 5000x the stake; realistic free spins wins can hit 70x-100x+
  • Mobile-friendly across all devices

Cons

  • RTP of 92.13% (common online version) is brutal vs. modern 96% standard
  • Dated visuals and retro sound design feel tired
  • High volatility means long droughts between bonus triggers
  • Base game offers almost nothing - all entertainment is in free spins
  • Hit frequency of 28% means roughly 3 out of 4 spins lose

FAQ

What is Book of Ra's RTP and how does it compare?

The headline RTP is 96%, but the version available at most online casinos runs 92.13% - well below the modern standard of 96%. Check your casino's terms to confirm which tier you're playing.

How often do free spins trigger and what's the typical payout?

With a 28% hit frequency, free spins are infrequent - expect long waits between bonuses. When they do land, typical wins cluster in the 40x-100x range. The sample session caught two bonuses in 200 spins (one paid 44x, the other 70x). Maximum free spins payout is 5000x the stake if an Explorer expands perfectly.

How does the expanding symbol mechanic work?

Before free spins start, the slot randomly selects one regular symbol to expand. Whenever that symbol lands during the feature, it fills the entire reel and pays across all active paylines at once - it also acts as a scatter, so adjacent reels don't matter. This is the only way to unlock big wins in this slot.

Can I play this slot on mobile?

Yes. The game is fully optimized for iOS and Android. Play via casino app or mobile browser without downloading anything - just spin and go.

Is the base game worth playing or should I skip to free spins?

Base game is flat - almost no payouts, no special features. Free spins is where all the action lives. Patience is mandatory. Use lower stakes to stretch your session while waiting for the bonus to pop.

Leave a Reply

Your email address will not be published. Required fields are marked *

Raymonds Ozols
Raymonds Ozols
Games Analyst

Raymonds has spent over a decade covering online casino games, focused on RTP verification, volatility models and the gap between how games are marketed and how they actually run. He covers crash games, instant formats and slot variance across EU and UK regulated markets — starting always from the certified RNG documentation, not the promo copy. He writes for 100slots.org and several other iGaming publications.

Reviewed by Marcus Reynolds – Senior Game Analyst

Editorial rating: 4.0/5

this slot is the slot that started the whole Book series and still refuses to fade despite being over a decade old. The expanding symbol mechanic in free spins is genuinely clever and can deliver 70x-100x+ wins when it fires. But the 92.13% RTP (common online version) is a brutal pill - well below modern standards - and high volatility means long droughts between bonuses. Nostalgia keeps players spinning; mechanics keep them coming back. Not the freshest game on the block, but it earned its legendary status.

Responsible Gaming & Licenses

This is an independent review hub, not a casino or betting operator. We only list operators that hold a valid licence and comply with Irish gambling regulations. Always check that an operator is authorised before depositing. Use responsible gaming tools: deposit limits, self-exclusion, cooling-off periods, and session time reminders.

18+ 18+ only. Gambling is entertainment, not a source of income. Set a budget before you play, never chase losses, and take regular breaks. If gambling is affecting your life, contact a support service: Problem Gambling Ireland or call the HSE Drug & Alcohol Helpline at 1800 459 459.

Affiliate Disclosure: This page contains affiliate links. If you register or deposit through them, we may receive a commission at no extra cost to you. Our recommendations are based on game quality, licensing status, and responsible gaming standards - not commission rates. Read our Terms & Conditions and Privacy Policy.

Regulatory Bodies & Resources

Slotoro Casino
Claim up to 2500$ + 250 free spins at Slotoro