Bonus Island

By / September 30, 2025
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Game Information

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Provider
Inspired Gaming
Type
Slots
Release Date
December 14, 2020
Reels
6
RTP
95.78
Volatility
3
Max Exposure
250000
Min Bet
0.1
Max Bet
20
Max Win per Spin
250000

Bonus Island Slot: Comprehensive Data Analysis

Core Game Specifications

AttributeValue
DeveloperInspired Gaming
Release Date2020-12-03
ThemePirate, Treasure, Adventure
Layout6 reels × 5 rows, 15,625 ways to win
Paylines15,625 ways
Bet Range£0.10–£20 (approx. €0.10–€20)
Core MechanicsCascading reels, Mystery Boost™ (mystery symbols transform via bomb), Coin Bonus (coins with cash prizes), Bonus Island treasure map feature (Bonus, Mega, Epic tiers), Free Spins with unlimited win multiplier, Free Spins Gamble
Platform HTML5, mobile‑optimized (portrait & landscape)

Mathematical & Payout Model

Return to Player (RTP)

95.78%

Volatility

Medium To High

Max Win Potential

25000x

Symbols & Paytable Hierarchy

TierSymbol(s)Function & Value
Low TierJ, Q, K, AProvides small, frequent wins to maintain gameplay.
Mid TierTelescope, Treasure Map, Sword, PistolThematic items offering moderate payouts.
High TierAnchor, Pirate CaptainHighest paying symbols. Top hits available with full combinations.

Bonus Island Bonus Features Mechanics

FeatureTriggerInitial AwardCore MechanicEnhancement/Retrigger
Mystery Boost™ Bomb lands with mystery symbols Transforms mystery symbols into matching symbols or coins
Coin Bonus Mystery symbols transform into coins Coins spin to reveal cash prizes
Bonus Island Feature 4 consecutive cascades Pick from 20 chests on map; captain offers cash or continue
Mega Bonus Feature 5 consecutive cascades Pick from 20 enhanced chests; similar to Bonus but higher values
Epic Bonus Feature 6 consecutive cascades Pick from 10 chests, all free spins
Free Spins with Unlimited Multiplier Free spins awarded from Bonus Island feature Multiplier increases by +1 each cascade, no limit
Free Spins Gamble After Bonus Island feature Spin wheel to gamble for up to 16 free spins or take current prize

Frequently Asked Questions (FAQ)

What is the RTP of Bonus Island? The RTP is approximately 95.78%.
How many ways to win does Bonus Island offer? It offers 15,625 ways to win on a 6×5 grid.
What is the maximum win multiplier? You can win up to 25,000× your stake.
How do you trigger the Bonus Island feature? By achieving 4 consecutive cascades in one spin.
What happens during Free Spins? You get an unlimited win multiplier that increases with each cascade, plus mystery barrels and coin features.
Can I gamble my free spins? Yes, via a wheel gamble you can risk your free spins or cash for up to 16 free spins.
What is the Mystery Boost™ feature? When a bomb lands, mystery symbols transform into matching symbols or coins, triggering wins or coin prizes.
Is Bonus Island mobile‑friendly? Yes, it’s built in HTML5 and works in both portrait and landscape on mobile devices.

Bonus Island Performance Summary: Strengths vs. Weaknesses

Strengths

  • Engaging pirate theme with immersive visuals and soundtrack
  • Innovative Mystery Boost™ and Coin Bonus mechanics
  • Multi‑tiered Bonus Island feature adds strategic depth
  • Unlimited multiplier in free spins offers huge win potential
  • Mobile‑optimized gameplay

Weaknesses

  • RTP slightly below industry average
  • High volatility may not suit low‑risk players
  • Base game payouts can be modest without bonus triggers

Overview

Bonus Island is a pirate‑themed video slot by Inspired Gaming featuring cascading reels, Mystery Boost™, Coin Bonus, and a multi‑tiered Bonus Island treasure map feature leading to free spins with unlimited multipliers. It offers up to 15,625 ways to win and a maximum potential payout of up to 25,000× your stake.

Rachel Pine
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