Great Blue

Great Blue Slot Review 2024

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  • Overall

  • Graphics

    Star Icon4.7/5
  • RTP

  • Volatility

This page is reviewed by
Kolade Adegoke
Kolade AdegokeOnline Slots Expert
According to our Editorial Guide

Ready for an underwater scuba online casino experience? Get your equipment because we are taking you underwater to meet the angelfish, starfish, seahorse, shark, orca whale, and sea shell in our Great Blue slot game review. One of the most popular slot games in Playtech’s portfolio, the Great Blue slot game ticks a lot of boxes: big payout of 10,000x your stake, well-designed symbols, rewarding features, great theme, impressive graphics, and an RTP of 96.03%. The game is placed on a 5x3 grid with 25 paylines and is available for mobile and desktop play.

If you get lucky enough to land 5 wilds represented by the friendly orca whale, you can collect all treasures from this deep ocean worth 10,000x your stake. By landing three or more scatter symbols represented by the sea shell, you’ll open the free spins round, bringing you up to 33 free spins and a 15x multiplier. Sounds good? Let’s get into our detailed review of the Great Blue slot game and break down all the details.

Great Blue Information

Repayment percentage96.03%
Max Profit-
Free SpinsYes
Bonus features-

Great Blue Slot Free Play 

Before we get to the nitty-gritty, here you can try the game for free. The game's demo version is your stepping stone to deciding whether you like it or not. Enjoy the game and get to grips with the gameplay, bonus features, and paytable.

Great Blue Slot Review 2024
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How to Play Great Blue Slot Game

The Great Blue slot game is placed on a 5x3 grid with 25 paylines paying from left to right. It’s a pretty simple game, even if you’re a newcomer to online slots. You must first decide your line bet wager and select how many paylines you want to bet. There are + and - controls which can help you adjust your stake. You can bet on 1-25 paylines, depending on your bankroll. Remember that playing on more paylines increases your chances of landing a winning combination.

Once you set up your wager, you can hit the pink spin button. If you’re impatient to wait for the reels to stop one by one, you can turn on the turbo button to speed up the game. And if you get tired from repeatedly clicking, there is a handy autoplay option on the left of your console with a window showing the number of spins to select from.  The basic information of the game, such as symbols, features and paytable, is clearly visible to players. Just press the info button on the leftmost side of the console and learn everything you need to know about the Great Blue slot game.

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Ready to play for real money? Check the best online casinos rated by the experts at IrishLuck, where you can play the Great Blue slot game for real money.

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Pros & Cons of the Great Blue Casino Game

  • 🤑 Big Winning Potential
  • 💰 15x Multiplier In The Bonus Round
  • 🎰 Maximum Of 33 Free Spins
  • 🎲 25 Paylines
  • 🌊 Underwater Theme
  • 😔 Less Frequent Payouts Because Of High Volatility
  • 👵 Slightly Outdated Graphics

Game Symbols and Paytable 

The game symbols are beautifully designed underwater creatures. The cast of characters includes a shark, sea turtle, seahorse, starfish, and angelfish as higher-paying symbols. Lower-paying symbols are underwater air bubbles forming the card numbers 9, 10, J, Q, K, and A. 

How much are they paying? Check below:

  • Orca whale (wild) - 2x, 3x, 4x, 5x pays 10; 250; 2,500; 10,000
  • Seashell (scatter) - 2x, 3x, 4x, 5x pays 2; 5; 20; 500
  • Shark - 2x, 3x, 4x, 5x pays 2; 25; 125; 750
  • Sea turtle - 2x, 3x, 4x, 5x pays 2; 25; 125; 750
  • Seahorses - 3x, 4x, 5x pays 15; 75; 250
  • Starfish - 3x, 4x, 5x pays 15; 75; 250
  • Angelfish - 3x, 4x, 5x pays 20; 100; 400
  • A, K - 3x, 4x, 5x pays 10; 50; 150
  • 9 - 2x, 3x, 4x, 5x pays 2; 5; 25; 100
  • 10, J, Q - 3x, 4x, 5x pays 5; 25; 100

As can be seen on the paytable, the lowest paying symbol is 9, but you can win with just two 9 symbols appearing on a payline. The second lowest-paying symbols are 10, J, and Q, and you need to match 3 of them in order to get paid. The higher-paying symbols at the bottom of the list are seahorses and starfish. You will get bigger winning combinations if you hit 5 angelfish on a payline. The most valuable symbols from the regular ones are shark and sea turtle, paying for a minimum of 2 matched symbols on a payline.

Great Blue Slot Game Symbols Wilds Scatters Seahorse Fish Shark

The orca whale is our wild symbol here, and it can bring you a grand prix prize worth 10,000x your stake by landing 5 friendly killer whale symbols on the screen. The wild symbol can appear anywhere on the reels and substitute for all symbols except scatters.  A shining pearl in a shell is a scatter symbol and pays much less than a wild, but it can take you into the bonus game round with a maximum of 33 free spins and a 15x multiplier.

Great Blue Slot Features

The Great Blue slot game won’t knock you off your socks with its game bonuses. It has only 1 bonus feature but with great potential, combining re-triggerable free spins and big multipliers. You will trigger the free spins round if you land 3 scatter symbols anywhere on the reels. The 3 pearls of the sea shells will bring you 8 free spins and a 2x multiplier when you enter the bonus game. Before you start spinning the reels into the bonus game, you’ll be given the option to choose 2 out of 5 sea shells to win extra free spins and/or multipliers. 

By landing 3 or more scatter symbols during the bonus round, you’ll be awarded 15 extra free spins played with the same multiplier as the triggered spin. You can activate this feature an infinite number of times during the bonus round. You can win up to 33 free spins and a 15x multiplier.

Great Blue Slot Game Theme

The action at the Great Blue slot takes place underwater in a deep blue ocean where the orca whale sits on the throne of its kingdom. Did you know that orcas are very intelligent creatures? Indeed! Some researchers found that the IQ of orcas is equivalent to 15- or 16-old humans. So, we are dealing with an intelligent wild symbol! Everything is blueish in this Great Blue slot game, which has a relaxing effect. Enjoy the calming, bubbling backdrop, the reels, and the card symbols made from underwater bubbles. The aquamarine symbols look stunning, standing out nicely on the ocean background.

Given the fact that the game was launched in 2013, it’s a little outdated graphically. However, it still compares with many famous titles with the same theme today. The music in the background gives the game a tropical feel, being silent between two spins. But when you hit the pink spin button, the Great Blue game comes to life.

About the Software Provider of the Game 

Founded in 1999, Playtech has taken its place among the world's largest and most successful casino game suppliers. The company is constantly developing different genres of casino games, including poker, blackjack, slot machines, and software for online sportsbooks. Gladiator, Great Blue, King Kong and the Mummy are among the most popular Playtech games. Being a business partner of Marvel, Playtech got the exclusivity of developing games with the most popular Marvel superheroes. So you can find the Avengers, Ghost Rider, Daredevil and the Incredible Hulk at online casinos that host Playtech games. 

What’s more, all jackpot games from Playtech share a progressive jackpot called Marvel Jackpot, with a fantastic pool amount and a possibility to win big. Playtech was announced as the most innovative growth company on the Forbes list in 2014. It’s licenced and regulated by the UK Gambling Commission, one of the world's strictest gaming authorities. Additionally, Playtech has various certificates demonstrating the great efforts made to guarantee compliance. Independent agencies are constantly auditing the game's fairness and payout percentages. 

Great Blue Slot Game Playtech software provider ireland online slot game

Great Blue RTP

The Great Blue slot game has a 96.03% RTP, which is a pretty high percentage. This essentially means that 96.03% of all combined wagers will be paid back to players over a large period of time. It’s a highly volatile slot game, and maybe that’s the reason for its popularity. The high variance of the game mainly comes from the great potential of the bonus round that can bring you a 15x multiplier and a total max win of 10,000x your stake.

Free Spins

The most enjoyable part of the game is entering into a free spins round. Maximum excitement! If you’re lucky enough to hit the 3 scatter symbols on the playfield, you’ll be rewarded with 8 free spins and a 2x multiplier. At the beginning of the round, you can pick 2 of 5 shells that can bring you up to 33 free spins and a 15x multiplier. The same feature can be retriggered in the free spins round, giving you the possibility of great wins with a maximum of 15x multiplier.


You can manually modify the paylines of the Great Blue slot, and select to bet on 1 through 25 paylines.  IrishLuck’s experts advise playing with all active paylines to get the maximum from the game. To form a winning combination, you must land 3, 4 or 5 of the same symbols on a payline starting from a leftmost reel. If the wild symbol is included on a payline with other symbols, it doubles your winnings. The cost of a line bet is moving from €0.01 - €2, and while playing on 25 paylines, your total bet ranges from €0.25 - €50.

Highest Payout

The Great Blue slot machine by Playtech is one of the highest-paying games that you can find at online casinos. If you happen to line up 5 orcas on a payline, you will win a massive jackpot of 10,000x your stake. And if you play with €50 per spin? Do the math.

Maximum Bet

The maximum bet of the Great Blue slot game is €50. It doesn’t take a genius to calculate that the maximum payout of the game is €500,000 – considering the 10,000x multiplier you get by landing 5 orcas on a payline.

Minimum Bet

The minimum bet at the Great Blue slot game is only €0.01 if you select only 1 payline. However, it is recommended that you play with at least €0.25 by selecting all the paylines to fully experience the game.

Great Blue Slot Game FAQs

Where can I play Great Blue in demo mode?

You can play Great Blue for free right here on this page or at any of the recommended online casinos listed above. Always check if the casino is licenced and read the terms and conditions in order to avoid unfair terms if you decide to join another casino not recommended by the experts at IrishLuck.

How much is the jackpot on the Great Blue slot game?

The jackpot of the Great Blue slot game is 10,000x your stake. By multiplying the maximum total bet of €50, the maximum you can win is a mind-boggling €500,000.

Where can I play the Great Blue slot game for real money?

You can play the Great Blue online slot for real money at any of the online casinos recommended by IrishLuck on this page when you make a deposit. Each one is fully licenced and regulated to accept real money coin bets and is also tested by independent agencies for fairness. Plus, you can claim a casino bonus to kickstart your adventure.

Does the Great Blue game have the gamble option?

No, the Great Blue slot game didn’t have a gamble feature at the time of writing this review. It used to have a gamble button in the past that allowed you to double your winnings or lose them after each winning spin, but Playtech has decided to remove it.

Online Slots Expert

Having been in the industry for the past 7 years, Kolade specialises in online slots and now spends most of his time playing and writing slot reviews.

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