Game Information
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Provider
Holle Games
Type
Slots
Theme
Fantasy
Release Date
January 7, 2025
Reels
5
Max Exposure
5000
Min Bet
0.1
Max Bet
50
Restrictions
GB
Book of Grimm Slot: Comprehensive Data Analysis
Core Game Specifications
| Attribute | Value |
|---|---|
| Developer | Holle Games |
| Release Date | 2025-01-07 |
| Theme | Fantasy, Magic, Fairytale, Brothers Grimm |
| Layout | 5×3 |
| Paylines | 10 |
| Bet Range | €0.10–€50.00 |
| Core Mechanics | Book symbol as Wild and Scatter, Free Spins with expanding symbol, Retriggerable Free Spins, Card and Ladder Gamble features |
| Software | Holle Games |
| Technology | HTML5, mobile‑friendly |
Mathematical & Payout Model
Return to Player (RTP)
94.45%
Volatility
High
Max Win Potential
5000x
Symbols & Paytable Hierarchy
| Tier | Symbol(s) | Function & Value |
|---|---|---|
| Low Tier | 10, J, Q, K, A | Provides small, frequent wins to maintain gameplay. |
| High Tier | Princess, Witch, Temptress | Highest paying symbols. Top hits available with full combinations. |
| Wild | Book symbol | Acts as a substitute / feature trigger per game rules. |
| Scatter | Book symbol | Triggers free spins / bonus round when enough appear. |
Book of Grimm Bonus Features Mechanics
| Feature | Trigger | Initial Award | Core Mechanic | Enhancement/Retrigger |
|---|---|---|---|---|
| Free Spins with expanding symbol | 3+ Book symbols (wild/scatter) anywhere | 10 free spins | Random symbol expands to full reel on wins | Retriggerable with same expanding symbol |
| Gamble features | After any win | Card Gamble or Ladder Gamble to risk winnings |
Frequently Asked Questions (FAQ)
| What is the RTP of Book of Grimm? | The RTP is 94.45%, which is below average for online slots. |
| How many paylines does the game have? | It has 10 fixed paylines across a 5×3 layout. |
| What is the maximum win multiplier? | The top win is 5000× your stake. |
| How do I trigger the Free Spins feature? | Land three or more Book symbols (which act as both wild and scatter) to trigger 10 free spins with an expanding symbol. |
| Can Free Spins be retriggered? | Yes, landing three or more Book symbols during Free Spins retriggers an additional 10 spins with the same expanding symbol. |
| What gamble options are available? | After any win, you can use Card Gamble or Ladder Gamble to risk your winnings for a chance to increase them. |
| What is the volatility of the game? | The game is high volatility, meaning wins may be less frequent but potentially larger. |
| What is the betting range? | You can bet from €0.10 up to €50.00 per spin. |
Book of Grimm Performance Summary: Strengths vs. Weaknesses
Strengths
- Engaging fairytale theme with rich visuals
- Expanding symbol Free Spins with retriggers
- High maximum win potential (5000×)
- Gamble features add extra excitement
Weaknesses
- Below‑average RTP (94.45%)
- Volatility may deter casual players
- Hit frequency not disclosed
Overview
Book of Grimm is a fantasy‑fairytale themed 5×3 slot by Holle Games released January 7, 2025. It features 10 fixed paylines, a 94.45% RTP, and high volatility. The Book symbol acts as both wild and scatter, triggering a free spins bonus with a randomly selected expanding symbol. Gamble features add extra risk‑reward layers.
Rachel Pine is our slots expert who has worked in the online gambling industry for 10+ years. Over the course of her career, Rachel has reviewed more than 30,000 slots.
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