Great Blue Video Slot


This promotion is for new customers only. Customers must be 18+. Customers must be residents of the UK/IE.


New customers only aged 18+. Minimum deposit £10. Get a Casino Bonus matched to your first deposit, up to £100, after you stake £20 on slots, credited within 48 hours. Bonus expires in 7 days and has a 40x wagering requirement. Additional T&Cs apply. Please bet responsibly.


New customers & 18+ only. Min. deposit of £10. Qualifying real money bet of £10. Min odds greater than or equal to 1.5 required. E/W bets excluded. Offer credited within 48 hours. Additional T&Cs apply. Please gamble responsibly.


#AD New customers only, min deposit £10, wagering 40x, max bet £5 with bonus funds. Max bonus is 100% up to £100. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller. Cashback is cash with no restriction. Full T&C’s apply. +18, Please Gamble responsible.


Take a calming dip in the ocean courtesy of Playtech and the Great Blue Online Slot. There are ferocious sharks, colourful fish, and a deep ocean world for you to explore, making this the perfect game when you need to kick back, chill out, and relax.

This highly volatile slot has an RTP of over 96%, a wild symbol that triggers a win of up to 10,000x, and a feature that offers up to 33 spins. Take a spin today at one of our recommended Online Casino or keep reading to learn about its payouts, paylines, and more.

Main Features

  • Game Type: 5 reels, 3 rows, 25 paylines
  • Return to Player (RTP): 96.03%
  • Volatility: High
  • Theme: Ocean Adventure
  • Release Year: 2013

The name of this slot not only refers to the great blue sea, which surrounds the reels on all sides, but also the blue whale that serves as the games wild. It’s the biggest animal in the sea (and on planet Earth) and triggers equally sizeable wins.

Other symbols include starfish, seahorses, and turtles, and if any of these are in a winning payline with the wild, the payout will be doubled.

Play for Real Money

Before you play for real money, you need a fully-funded online casino account. If you’re new, drop by your casino’s Promotions page, see which offers you’re entitled to and make a qualifying deposit to collect. If you already have an account, just visit the cashier, choose your preferred payment method, and start spinning those ocean-themed reels!


The blue whale wild is the symbol you need to look out for in this game. Not only does it trigger wins ranging from 10x to 10,000x, but you only need 2 symbols to win, it substitutes for most other game symbols, and it doubles the size of all other symbol wins.


  • Coin Sizes: Using the little purple buttons on the bottom of the game reels, you can choose how many lines you want to play, ranging from 1 to 25, and set a stake for each of them. The lowest bet per payline is £0.01 and the highest is £2, equating to a total minimum bet of £0.01 with 1 payline and a maximum of £50 with all 25.
  • Symbols:
    • Main: Sea Creatures (Turtle, Shark, Seahorse, Starfish, Fish)
    • Standard: Playing Card Symbols (9 to A)
    • Wild: Whale
    • Scatter: Clam Shell
  • Additional Bonus Rounds:
    • Sea Shell Bonus: Claim as many as 33 bonus spins, along with a multiplier of 15x.
    • Wild: The biggest symbol in the game, triggering a payout as high as 10,000x per line bet and doubling all other symbol wins.
Symbol2 on a Payline3 on a Payline4 on a Payline5 on a Payline
Clam Scatter2x5x20x500x
Orange Seahorse-15x75x250x
Purple Starfish-15x75x250x
Yellow Striped Fish-20x100x400x

The clam shell opening to expose a pearl is the most enticing symbol on the Great Blue slot game and it’s also one of the biggest. As many of 5 of these can appear on the reels during any spin, but you only need 3 of them to unlock the game’s main feature.

Known as the sea shells bonus, this feature gives you 8 spins and a 2x multiplier. When the game begins, you’ll be asked to choose two of the five shells and can unlock additional spins and multipliers before the round begins in earnest.

If three or more of these scatter symbols appear during the feature, another 15 games will be added to your total and the good times will keep rolling! You’ll get the same multiplier you had at the point these additional games were triggered and you can repeat this process again and again, stacking those big wins high.

For more information about the games payouts, take a look at the symbol table on this page. For a full rundown of all payline positions, click the “Info” icon below the game reels.

Software and Mobile Experience

Play Great Blue on the go at any of our recommended online casinos. All of their slots, Live Casino games, and table games are supported on mobile and can be played anywhere you have a secure connection. What’s more, as Great Blue isn’t overloaded with big animations and visuals, it runs smoothly even on older devices and slower connections.

For optimal convenience, play directly through your mobile browser, like Chrome, Edge, and Safari, allowing for quick and easy gaming at a time that suits you.


Great Blue is a back-to-basics slot that puts simple features, a great aesthetic, and big wins before any flash visuals and animations. It looks stunning, sounds amazing, and makes for a great alternative to all-action, slots like Starburst and Gladiator. Sometimes, it’s good to tone things down and chill out, especially when you throw a high RTP and a payout of up to 10,000x into the mix!