Merkur Gaming

221B Baker Street

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Play 221B Baker Street slot by Merkur Gaming for free in demo mode! Explore RTP, bonus rounds, and key features before playing for real.

Only 0.2% of slots combine Medium/High and Substitution Symbols.

SlotRanker Score

/ 99

05099

The SlotRanker Score is calculated from the visible data below. It is not affected by affiliate deals or paid placement.

How this score is built

RTP

96%

return to player

Volatility

Medium volatility

variance

Max win

—

top multiplier

Min bet

$0.20

per spin

Reels

20 lines

Player rating

4.0 ★

11 votes

DEMO Play free, no signup

Merkur Gaming

Embed on your site

4.0 / 5

11 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 & RTP9/10

RTP 96% → 9.0/10

Volatility8/10

medium → 8.0/10

Win Potential—

no data

Features7.5/10

10 features → 7.5/10

Game Mechanics5.4/10

f=10 r=5 p=20 → 5.4/10

Context signals (tie-breakers)

Layout6/10

5x3 → 6.0/10

Bet Flexibility6/10

0.2–40 (×200) → 6.0/10

Provider Reputation6/10

provider avg 6.0 → 6.0/10

Popularity0/10

synthetic proxy → 0.0/10

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: 62 — 221B Baker Street by Merkur Gaming

https://slotranker.com/merkur-gaming/221b-baker-street#score

How to cite

Spec sheet

221B Baker Street at a glance.

Identity

Slot name221B Baker Street

StudioMerkur Gaming

Released2/11/2015

Math

SlotRanker Score62

RTP96%

VolatilityMedium volatility

Max win—

Bet range$0.20 – $40.00

Player rating4.0 / 5 · 11 votes

Format

Reels5

Paylines20

Layout5x3

Features

Themes

Expected average based on this slot's 96% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$3.20

Cost per session$3.20

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 221B Baker Street? 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

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). The model is calibrated so the average return equals this slot's published RTP (96.00%), with wins capped at its top multiplier (1,000×).

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.

Compare 221B Baker Street with other games

	221B Baker Street Score 62This game	The Invisible Man Score 78	A Dark Matter Score 76	Mystery Express Score 73	Hyde & Seek Score 67
Identity
Studio	Merkur Gaming	NetEnt	Slingshot Studios	IGT	Massive Studios
Released	2/11/2015	12/11/2014	10/22/2019	4/23/2020	2/23/2025
Math
RTP	96%	96.3%	96.18%	96%	96.59%
Volatility	Medium volatility	Medium volatility	High volatility	Medium volatility	—
Max win	—	—	—	41,667×	2,000×
Format
Reels	5	5	5	5	5
Layout	5x3	5x3	5x3	5x3	5x4
Paylines	20	20	5	30	—
Min bet	0.20	0.20	0.05	0.30	0.10
Max bet	40.00	10.00	50.00	600.00	100.00
Features
Progressive	—	—	—	—	—
Wild symbol	✓	✓	✓	✓	✓
Free spins	✓	✓	✓	—	✓
Scatter symbol	✓	✓	✓	—	✓
Multiplier	✓	✓	✓	✓	—
Bonus game	—	✓	—	✓	—
Respins	—	✓	—	—	—

Every number is shown as a delta against 221B Baker Street.

Comparing against

221B Baker Street

Merkur Gaming

RTP

96%

Max win

—

Score

+ Bonus Game+ Respins

+ Bonus Game− Free Spins− Scatter

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