SpinOn

Dr. Cranko's Lab

SpinOn science-fantasy slot with changing reels and accumulating scatter events

0.5% of the games we track list Multi Level Bonus; Dr. Cranko's Lab is one of them.

SlotRanker Score

/ 99

05099

The SlotRanker Score is calculated from the visible data below. It is not affected by affiliate deals, and it cannot be bought.

How this score is built

RTP

94%

return to player

Volatility

Medium/High

variance

Max win

7,500×

top multiplier

Min bet

$0.20

per spin

Reels

20 lines

Player rating

3.6 ★

4 votes

DEMO Play free, no signup

SpinOn

Embed on your site

3.6 / 5

4 ratings

User ratings are shown separately from the Slot Score unless stated otherwise.

Five weighted signals shape the composite. Four context signals refine ties. See how we rate for the full methodology.

Payouts & RTP6/10

RTP 94% → 6.0/10

Volatility9/10

high → 9.0/10

Win Potential7.8/10

x7500.00 (7500×) → 7.8/10

Features10/10

17 features → 10.0/10

Game Mechanics6.3/10

f=17 r=5 p=20 → 6.3/10

Context signals (tie-breakers)

Layout6/10

5x3 → 6.0/10

Bet Flexibility6/10

0.2–65 (×325) → 6.0/10

Provider Reputation6.3/10

provider avg 6.3 → 6.3/10

Popularity2.5/10

synthetic proxy → 2.5/10

Popularity blends real player search demand (~30 markets) with a catalogue-derived proxy; games without measurable search demand use the proxy alone. Not live play telemetry.

Cite this score

SlotRanker Score: 66 — Dr. Cranko's Lab by SpinOn

https://slotranker.com/spinon/dr-crankos-lab#score

How to cite

Slot Summary

A mad scientist and his hybrid creatures give Dr. Cranko's Lab its subject, but the experiment that matters is the changing reel state. SpinOn combines Avalanche wins with a rising Multiplier, random modifiers, Sticky Wild respins, and an Expanding Reels event that can add another reel. The 94% RTP sits below the game's denser feature count, making the medium-high volatility and 7500x ceiling essential context for a design that asks the player to wait for several systems to meet.

How It Plays

Regular play starts on a five-reel, three-row arrangement with 20 paylines, then Avalanche wins remove contributing symbols and admit replacements.

Random modifiers can introduce Sticky Wilds, substitute one symbol type for another, or expand the active reel set, so individual spins need not finish in their initial form.

Theme & Atmosphere

Science supplies the laboratory premise, with Dr. Cranko presented as an inventor working on unusual creatures rather than a conventional casino host.

Fantasy enters through those hybrid creations and exaggerated experiments, giving the laboratory a comic identity while the mechanics remain readable and state-driven.

Fantasy Science

Features & Win Potential

Sticky Wilds remain in position for a respin, while the Substitution Symbols modifier can replace one regular symbol type across the visible reels.

Expanding Reels and Reelset Changing can add a sixth reel, and successive Avalanche wins feed the active Multiplier before the sequence stops.

Free Spins Multi Level Bonus Multiplier Scatter Symbol Wild Symbol Cascading 5 Reels Expanding Reels Sticky Wilds Symbols collection (Energy)Additional Free Spins RTP range Avalanche Gonzo mechanic Free Spins Multiplier Reelset Changing Substitution Symbols

Bonus & Free Spins

Landing two Scatter Symbols advances the Free Spins meter instead of immediately opening the round. Reaching 20 recorded events unlocks Super Free Spins.

Inside Free Spins, higher Multiplier ranges apply while Avalanche, Sticky Wilds, and Additional Free Spins can extend the value of an active sequence.

Spec sheet

Dr. Cranko's Lab at a glance.

Identity

Slot nameDr. Cranko's Lab

StudioSpinOn

Released2/25/2026

Math

SlotRanker Score66

RTP94%

VolatilityMedium/High

Max win7,500×

Bet range$0.20 – $65.00

Player rating3.6 / 5 · 4 votes

Format

Reels5

Paylines20

Layout5x3

Features

Themes

Expected average based on this slot's 94% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$4.80

Cost per session$4.80

Estimate only, for entertainment purposes — treat gambling as entertainment, not a way to make money, and set a budget you can afford to lose.

How long could a bankroll last on Dr. Cranko's Lab? We simulate thousands of sessions from this game's published RTP and volatility — the long-run math, not a prediction of your next spin.

Bankroll ($)Bet per spin ($)Speed

Volatility tier: Medium-High

Running simulation…

How this works

Each simulated spin either misses or returns a win drawn from a log-normal distribution, with the hit rate and spread set by the slot's volatility tier (Medium-High). The model is calibrated so the average return equals this slot's published RTP (94.00%), with wins capped at its top multiplier (7,500×).

This is a simplified, parametric model of the game's math — not its real paytable. It exists to make the house edge visible over many sessions, so the numbers above are averages across thousands of runs, never a forecast of one.

This is math, not a prediction. Real sessions vary wildly, and no strategy changes a game's built-in house edge. Play for fun, set limits, and never bet more than you can afford to lose.

Where to play Dr. Cranko's Lab

No matching casinos for your region yet

Casino availability depends on where you play from. We only show casinos that accept players from your country.

Compare Dr. Cranko's Lab with other games

	Dr. Cranko's Lab Score 66This game	Professor Lightning Score 84	Alive Megaways Score 83	Magic Lab Score 80	Fury of Hyde Megaways Score 79
Identity
Studio	SpinOn	Massive Studios	Skywind Group	NetEnt	Jelly
Released	2/25/2026	6/3/2026	8/16/2021	3/21/2024	2/8/2023
Math
RTP	94%	96.53%	96.47%	96.06%	96%
Volatility	Medium/High	High volatility	High volatility	Medium/High	High volatility
Max win	7,500×	20,000×	10,000×	5,999×	10,000×
Format
Reels	5	6	6	6	6
Layout	5x3	6x6	6x7	6x5	6x7
Paylines	20	—	200704	Pay Anywhere	117649
Min bet	0.2	0.1	0.2	0.1	0.2
Max bet	65	35	20	10	20
Features
Progressive	—	—	—	—	—
Wild symbol	✓	✓	✓	✓	✓
Free spins	✓	✓	✓	✓	✓
Scatter symbol	✓	✓	✓	✓	✓
Multiplier	✓	✓	✓	✓	✓
Bonus game	—	—	—	—	—
Respins	—	—	—	—	—

Every number is shown as a delta against Dr. Cranko's Lab.

Comparing against

Dr. Cranko's Lab

SpinOn

RTP

94%

Max win

7,500×

Score

Fury of Hyde Megaways

Explore More Games with Similar RTP

	Provider	RTP	Volatility	Max win	Score
Scopa	Habanero	93.96%	High volatility	4,000×	67
Carnival Cow Coin Combo	Light & Wonder	93.97%	High volatility	30,000×	71
Dream Drop Diamonds	Relax Gaming	93.98%	High volatility	10,640×	66
Flying Hippo	Pragmatic Play	93.99%	High volatility	5,000×	69
Dr. Cranko's Lab	SpinOn	94%	Medium/High	7,500×	66
The Runemakers DoubleMax	Bang Bang Games	94%	High volatility	15,000×	79
Skate or Die	NoLimit City	94.01%	High volatility	30,000×	77
Rock Bottom	NoLimit City	94.02%	High volatility	19,960×	78
San Quentin 2	NoLimit City	94.03%	High volatility	200,000×	76
I Hate Fairytales	Elysium Studios	94.04%	High volatility	33,934×	78
Cash Truck	Quickspin	94.05%	High volatility	25,000×	76