300SPINS™ REVIEWHARDCOREBook of Dizzy
Degen Studios
Book of Dizzy is a dark magic wizard's library-themed slot by Degen Studios.
The slot is built on changeable reels with 10-20 paylines and offers a theoretical maximum win of x10000x.
It also comes with special features such as Special Expanding Symbol and Reel Expansion, adding extra gameplay variety from the feature mix and expanded reel space during key moments.
Verdict
HARDCOREPlayer Fit Spectrum
56/100
CasualBalancedHardcore
Based on the 300SPINS™ test, Book of Dizzy may suit players who enjoy suspense and substantial reward moments.
In addition, a few large wins accounted for much of the total payout in this test. This may suit players who enjoy sessions shaped by a handful of standout moments.
About 300SPINS™
300SPINS™ uses 300 spins to explore the first impression of a single play session. We record win frequency, win multipliers and free-spin triggers to show the rhythm and character of early play.
Experienced RTP Deviation
RTP Deviation
132.1%
Below avg.Avg. (99.56%)Above avg.
Deviation measures how far this session’s RTP sits from the all-review average, whether above or below it.
This slot shows a moderate deviation from the average and is expected to maintain an appropriate balance between large wins and losses.
About RTP Deviation
This analysis does not evaluate the slot's theoretical RTP or long-run return. It only measures how far the total return recorded in this 300-spin session was from the average of other eligible 300SPINS™ reviews conducted with the same method. A larger deviation may suggest a wider range of outcomes, but it does not establish the slot's actual volatility or predict future results.
Specifications
Characteristic
HARDCORE
User Rating
No ratings
Free Spin
0 Triggers
Jackpot
None
Reel Config
Changeable
Paylines
10~20 Lines
RTP
96.16%
Volatility
-
Max Win
10,000x
Bonus Buy
75x
Demo Play
Book of Dizzy by Degen Studios
Book of Dizzy by Degen Studios
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Balance Chart: 300SPINS™ Review
Balance Timeline
300 Paid Spins300SPINS balance time-series chart for Book of Dizzy. The chart starts at 100000, ends at 100193, and bottoms at 99934 on spin 237. Free spin trigger markers appear on spin .
300SPINS balance timelineSPIN 0Balance 100,000
Bonus Buy Efficiency
Avg. Minx81.6
Avg. Maxx129.1
LowExpectedHigh
Price x75
Experience Value
High Experience Value
Free spins did not trigger naturally during our 300-spin session. With a buy price of x75, buying offers a much shorter path if you mainly want to experience the free-spin feature.
Monetary Value
Weak Monetary Value
Free-spin payout strength and free-spin dependency were moderate compared with other slots in our 300SPINS reviews. The buy looks useful as access to the feature, but not an exceptional profit signal.
Free Spin Analysis: 300SPINS™ Review
Free Spin Profile
Dynamic Experience
Free spins were rare, so the feature felt more like a special moment than a regular part of the session. This creates a more dynamic free-spin experience, where waiting for the feature becomes part of the tension.
Free Spin Comparison
HARDCORE+Free spin profile chart for Book of Dizzy. Free spins did not trigger naturally during our 300-spin session. The field average is 2.13. Free spin payout averaged N/A, against a field average of 64.5x.
Free Spin Hit Rate
Natural free spin triggers during 300 paid spins
0
TOP 20
6
SLOT
0
AVG.
2
BOTTOM
0
Free Spin Payout Multiplier
Average payout multiplier per free spin trigger
N/A
TOP 20
181.2x
SLOT
N/A
AVG.
64.5x
BOTTOM
11.9x
Free Spin Quadrant
FREQUENTFrequent
Strong
Quiet
Impact
SLOT
Hit Rate Analysis: 300SPINS™ Review
Play Rhythm
Balanced Experience
Profitable hits had a noticeable presence, but they did not dominate the whole session rhythm. This creates a balanced play rhythm, sitting between visible action and meaningful profit hits.
Rhythm Comparison
HARDCORERhythm comparison chart for Book of Dizzy. Hit Rate is 38.7% against a field average of 27.0%, while Profit Hit Rate is 11.0% against a field average of 10.7%.
Hit Rate
Any winning paid spin
38.7%
TOP 20
44.0%
SLOT
38.7%
AVG.
27.0%
BOTTOM
12.6%
Profit Hit Rate
Paid spins returning more than the bet
11.0%
TOP 20
16.7%
SLOT
11.0%
AVG.
10.7%
BOTTOM
5.9%
Rhythm Quadrant
PROFITFrequent
Strong
Dry
Selective
SLOT
More slots from Degen Studios
Payout Analysis: 300SPINS™ Review
Payout Profile
Dynamic Experience
The largest payout moment stood out clearly, giving the session a sharper peak. This creates a more dynamic payout profile, where the result is shaped by sharper swings and stronger payout movement.
Payout Comparison
HARDCORE+Payout comparison chart for Book of Dizzy. Max Payout is 135.8x against a field average of 101.0x, while Avg Payout is 3.42x against a field average of 4.51x.
Max Multiplier
Largest payout from a single paid spin
135.8x
TOP 20
300.1x
SLOT
135.8x
AVG.
101.0x
BOTTOM
17.1x
Average Multiplier
Average payout per paid spin
3.42x
TOP 20
10.4x
SLOT
3.42x
AVG.
4.51x
BOTTOM
1.52x
Payout Quadrant
SWINGPeak
Swing
Steady
Dynamic
SLOT
Dependency Analysis: 300SPINS™ Review
Dependency Profile
Dynamic Experience
A large share of the total payout came from bigger wins, making the result feel concentrated and high-impact. This creates a more dynamic dependency profile, where the session result leans heavily on specific high-impact moments.
Dependency Comparison
HARDCORE+Dependency comparison chart for Book of Dizzy. Free Spin Dependency is 0.0% against a field average of 30.6%, while Big Win Dependency is 72.8% against a field average of 50.0%.
Free Spin Dependency
Share of total payout that came from free spins
0.0%
TOP 20
72.2%
SLOT
0.0%
AVG.
30.6%
BOTTOM
0.1%
Big Win Dependency
Share of total payout that came from larger standout wins
72.8%
TOP 20
72.1%
SLOT
72.8%
AVG.
50.0%
BOTTOM
30.1%
Dependency Quadrant
BIG WINBonus
Loaded
Steady
Big Win
SLOT
Special Features
Feature Highlight: Special Expanding Symbol
The Special Expanding Symbol is one of the most iconic and popular mechanisms in online slot history, a core free spins feature primarily found in 'Book of...' series games. The essence of this feature is that one regular symbol, randomly selected at the start of the free spins, gains a special power. This symbol, as long as it appears on the reels in the required number to form a win, will expand to cover its entire reel and create massive wins regardless of its position.
Feature Highlight: Reel Expansion
Reel Expansion is a feature where the physical size of the game grid (reels or rows) actually gets bigger, typically upon entering a bonus round like free spins. This goes beyond simply adding a multiplier; it aims to expand the 'board' of the game itself, providing players with a wider field of opportunity and fundamentally increasing the number of winning ways.
Gallery
User Rating
Community Score
No ratings
Based on 0 community ratings. User ratings are shown separately from our 300SPINS™ session data.
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About 300SPINS™ Reviews
300SPINS™ reviews are manually checked reports built around a consistent first-session test. The data comes from our own actual play sessions, not from provider sheets or third-party result feeds. Each review analyzes nine session metrics to describe how the slot behaved during our test run. These results do not represent the full mathematical profile of the game, so they should be read as structured first-session evidence rather than a final verdict on every possible outcome.