Naga Games

Forbidden Island

Slots Video Slots Action & Adventure Jungle Animals Sea Treasure Exploration

An island expedition advanced by collecting winning symbols

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

97.58%

return to player

Volatility

Medium volatility

variance

Max win

—

top multiplier

Min bet

—

per spin

Reels

Cluster Pays lines

Player rating

3.7 ★

7 votes

DEMO Play free, no signup

Naga Games

Embed on your site

3.7 / 5

7 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 & RTP10/10

RTP 97.58% → 10.0/10

Volatility8/10

medium → 8.0/10

Win Potential—

no data

Features7/10

8 features → 7.0/10

Game Mechanics5.5/10

f=8 r=5 p=n/a → 5.5/10

Context signals (tie-breakers)

Layout6/10

5x3 → 6.0/10

Bet Flexibility—

—

Provider Reputation7.6/10

provider avg 7.6 → 7.6/10

Popularity6.7/10

synthetic proxy → 6.7/10

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: 77 — Forbidden Island by Naga Games

https://slotranker.com/naga-games/forbidden-island#score

How to cite

Slot Summary

A five-by-five cluster board is the starting point for Forbidden Island, Naga Games' treasure-hunting slot. Its island stages change the symbols available as winning combinations fill a collection bar. The expedition has a concrete destination: replacing low-paying symbols with higher-paying ones when the final island is reached.

How It Plays

The early island stages merge low-paying symbols, add wilds, and place a randomly selected symbol in a checkered pattern. Each stage changes the board in a different way.

Mystery symbols reveal the same randomly selected paying symbol. Separately, the collection bar counts winning symbols toward the final island, where the remaining low-paying symbols become higher-paying symbols.

Spec sheet

Forbidden Island at a glance.

Identity

Slot nameForbidden Island

StudioNaga Games

Released9/12/2024

Math

SlotRanker Score77

RTP97.58%

VolatilityMedium volatility

Max win—

Bet range—

Player rating3.7 / 5 · 7 votes

Format

Reels5

PaylinesCluster Pays

Layout5x5

Features

Themes

Expected average based on this slot's 97.58% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$1.94

Cost per session$1.94

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 Forbidden Island? 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 (97.58%), 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 Forbidden Island

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Compare Forbidden Island with other games

	Forbidden Island Score 77This game	Capitan Chimp Score 61	3 Secret Cities Score 88	Barbarossa Revenge DoubleMax Score 83	Blackbeards Bounty Score 79
Identity
Studio	Naga Games	5 Men Gaming	4ThePlayer	Peter and Sons	Habanero
Released	9/12/2024	4/7/2023	5/19/2021	10/1/2024	6/15/2012
Math
RTP	97.58%	95%	96.5%	96.4%	96.19%
Volatility	Medium volatility	High volatility	High volatility	High volatility	High volatility
Max win	—	547×	50,000×	30,000×	—
Format
Reels	5	5	5	5	5
Layout	5x5	5x4	5x3	5x3	5x3
Paylines	Cluster Pays	40	1024	243	25
Min bet	—	0.1	0.1	0.2	0.25
Max bet	—	40	20	50	25
Features
Progressive	—	—	—	—	✓
Wild symbol	✓	✓	✓	✓	✓
Free spins	✓	✓	✓	✓	✓
Scatter symbol	✓	✓	✓	✓	✓
Multiplier	—	—	✓	✓	✓
Bonus game	—	—	✓	—	—
Respins	—	—	—	—	—

Every number is shown as a delta against Forbidden Island.

Comparing against

Forbidden Island

Naga Games

RTP

97.58%

Max win

—

Score

+ Multiplier+ Bonus Game

Barbarossa Revenge DoubleMax

+ Progressive+ Multiplier

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