95.78% RTP

Bonus Island



Discover a treasure trove of features in Inspired Gaming’s pirate-themed Bonus Island slot game. With up to 15,625 ways to win, three kinds of free spins thanks to the Bonus Island bonus round, and a Mystery Boost feature that can trigger on the reels at any point, this game is one of our most all-action titles yet.




  • 10x maximum base game jackpot
  • 15,625 ways to win
  • Three Bonus Island free spins features
  • Slot provider: Inspired Gaming




With ten base game symbols active on the reels of Bonus Island, you are never too far away from landing an exciting symbol combination. The four playing card royals from Jack to Ace are the lowest-paying symbols, followed by the telescope, the scroll, the sword and the cannon. The anchor comes next, with the bearded pirate the most valuable of all base game symbols, worth 10x payouts when landing six on a payline.

This slot also contains wooden brown symbols that are mystery symbols. They transform into base game symbols whenever a cannonball lands on any of the reels, helping to improve or create new symbol combos.




Once the Bonus Island slot game has fully loaded, you can set your stake per spin by clicking the button with the stacked coins. Click it once to open the staking window to adjust your stake size. If you are happy with your stake value, you can click the arrow spin button to start the reels spinning. You can also toggle the in-game sound to be on or off, depending on your preference and access the symbol paytable by clicking the settings button.




If you want to trigger any of the three Bonus Island bonus games, you’ll need to achieve at least four symbol cascades from a single spin. Therefore the best strategy is to look out for four cascades, with each cascade filling up the bonus meter. It’s not possible to influence the outcome of spins on Bonus Island, given that the game is programmed to pay out in accordance with the Bonus Island RTP.




  • Mystery Boost: The wooden box symbol with the white dash is the mystery symbol. It can appear on any reel. Whenever the purple cannonball lands on a reel, it transforms all mystery symbols into a base game symbol or coin.  
  • Bonus Island feature: Land four symbol cascades to enter the Bonus Island feature. There are Mega and Epic Bonus Island rounds reserved for five and six successive symbol cascades respectively. Work your way around the treasure map to collect cash prizes or free spins from the Captain’s offer.




Any free spins are awarded as part of the Bonus Island feature. Whenever the skull symbol lands it transforms into a beneficial base game symbol or a gold, silver or bronze coin to help award additional spins or an instant Bonus Island payout.




If you enjoy the thrill of walking the plank in slot games, we’ve got plenty more pirate-themed capers where Bonus Island came from. Be sure to fire up the reels of Pirates’ Plenty Megaways where more silver and gold may lie in wait!




Bonus Island is not the only game where the action is. In fact, at Betfair Casino, we offer a jam-packed library of exciting casino games. Thanks to our partnerships with the industry’s pioneering software developers, you can be sure of the best audio and visual slot and table game experiences on desktop or mobile. Combine that with fast, helpful 24/7 customer support and a huge choice of payment options, why play anywhere else?




If you are new to Betfair Casino and you’d like to create an account to try the Bonus Island slot, we’re sure to have a welcome bonus that takes your fancy. Whether it’s free spins or matched deposit bonuses, you can rely on us to give you more bang for your buck when you become a part of the increasingly popular Betfair Casino community.

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