Merkur Gaming

Monkey Mayhem

Slots Video Slots Nature Fruit Africa Jungle Animals

Compact Jungle slot dominated by a transforming barrel feature

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

96.03%

return to player

Volatility

Medium volatility

variance

Max win

—

top multiplier

Min bet

$0.10

per spin

Reels

10 lines

Player rating

4.2 ★

15 votes

DEMO Play free, no signup

Merkur Gaming

Embed on your site

4.2 / 5

15 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 96.03% → 9.0/10

Volatility8/10

medium → 8.0/10

Win Potential—

no data

Features6/10

9 features → 6.0/10

Game Mechanics4.2/10

f=9 r=5 p=10 → 4.2/10

Context signals (tie-breakers)

Layout6/10

5x3 → 6.0/10

Bet Flexibility6/10

0.1–20 (×200) → 6.0/10

Provider Reputation5.9/10

provider avg 5.9 → 5.9/10

Popularity3.3/10

synthetic proxy → 3.3/10

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: 64 — Monkey Mayhem by Merkur Gaming

https://slotranker.com/merkur-gaming/monkey-mayhem#score

How to cite

Slot Summary

Monkey Mayhem fills a narrow brief: a 10-line Jungle slot whose main event is one barrel-to-Wild transformation rather than a long chain of modifiers. Merkur Gaming uses a 5x3 grid, medium volatility, and a 96.03% RTP, but the defining interruption is the barrel that converts itself and adjacent positions into substituting monkeys.

How It Plays

The base game uses five reels and 10 lines, with standard combinations evaluated through the fixed paytable. Most spins stay conventional until a barrel appears.

A stake can range from 0.1 to 20. Medium volatility accompanies that compact range, while the separate Gamble option can extend a completed win decision.

Theme & Atmosphere

The Jungle setting uses Animals, bananas, palms, coconuts, and huts to establish its playful tone. Fruit imagery links the setting to Merkur's traditional slot vocabulary.

Nature details remain clear around the small grid, allowing the monkeys and barrel to function as both theme markers and immediately recognizable mechanical symbols.

Nature Fruit Africa Jungle Animals

Features & Win Potential

A barrel transforms into a Wild monkey and also creates Wild monkeys in the adjacent positions above, below, left, and right. Each monkey substitutes for regular symbols.

Because the conversion can affect several neighboring spaces at once, the Wild feature changes multiple line paths from a single barrel landing rather than modifying one symbol only.

Wild Symbol Medium volatility 5 Reels Gamble Bonus Game 10 Paylines 96% RTP Risk/Gamble (Double) game Substitution Symbols

Bonus & Free Spins

The Bonus Game is the barrel event itself. It replaces the barrel and adjacent positions with substituting monkeys, concentrating the special action directly on the base grid.

Spec sheet

Monkey Mayhem at a glance.

Identity

Slot nameMonkey Mayhem

StudioMerkur Gaming

Released8/21/2018

Math

SlotRanker Score64

RTP96.03%

VolatilityMedium volatility

Max win—

Bet range$0.10 – $20.00

Player rating4.2 / 5 · 15 votes

Format

Reels5

Paylines10

Layout5x3

Features

Themes

Expected average based on this slot's 96.03% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$1.59

Cost per session$1.59

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 Monkey Mayhem? 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 (96.03%), 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.

Where to play Monkey Mayhem

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Compare Monkey Mayhem with other games

	Monkey Mayhem Score 64This game	Bush Telegraph Score 75	Benny's the Biggest Game Score 62	Banana Drop Score 68	Savanna Spin Score 63
Identity
Studio	Merkur Gaming	Games Global	Mascot Gaming	Crazy Tooth Studio	Spinoro
Released	8/21/2018	1/1/2005	10/17/2019	7/16/2020	2/19/2018
Math
RTP	96.03%	96.56%	95.52%	96.7%	94%
Volatility	Medium volatility	Medium volatility	Medium volatility	Medium volatility	Medium/High
Max win	—	—	250×	6,031×	8,865×
Format
Reels	5	5	5	6	5
Layout	5x3	5x3	5x3	6x4	5x3
Paylines	10	15	20	4096	9
Min bet	0.1	0.01	0.2	0.15	0.4
Max bet	20	375	100	30	90
Features
Progressive	—	—	—	—	—
Wild symbol	✓	✓	✓	✓	✓
Free spins	—	✓	✓	✓	✓
Scatter symbol	—	✓	✓	✓	✓
Multiplier	—	—	✓	—	✓
Bonus game	✓	✓	✓	—	✓
Respins	—	—	—	—	—

Every number is shown as a delta against Monkey Mayhem.

Comparing against

Monkey Mayhem

Merkur Gaming

RTP

96.03%

Max win

—

Score

+ Free Spins+ Scatter

Benny's the Biggest Game

+ Free Spins+ Scatter+ Multiplier

+ Free Spins+ Scatter− Bonus Game

+ Free Spins+ Scatter+ Multiplier

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