Great Blue

83 votes
Great Blue
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Great Blue for free now
Game Type
Free Slots


Game Provider
Max win
Min bet
Max bet
Release year
Game Technology
Android iOS Mobile Tablet Desktop
3D, Bonus Game, Substitution Symbols, Free Spins, Free Spins Multiplier, Gamble, Gamble Feature, Scatter Symbols, Stack, Wild
Water world


  • Decent RTP
  • High payout
  • Infinite free spins chance


  • Dated graphics
  • Common underwater theme

Great Blue Slot

This section is all about how the game works: What is the RTP; Is this game a low, medium, or high volatility; What are the betting range and highest payout; etc. Let’s begin with the first important factor of the game, the RTP.

RTP and Variance

Great Blue RTP is set at 96.03%, which means that for every $100 that players spent on the game, they will receive at least $96.03 on average. This figure is high enough for most casual slotters, as they are into the game itself more than the wins. On the other hand, this is a high volatility game, which means that it is also suitable for high rollers due to its huge payouts, especially when combined with the Wild symbol.

Betting Range and Paylines

The betting system of the Playtech slot is simple: you can change your active lines, your bet per line, or both. There are 25 paylines in the game, each one can be wagered using as little as $0.01 to $2, making the total bet ranges from $0.01 to $50. Whatever your strategy is, there will be an appropriate setup for you.

Highest Payout

The highest prize in this game is 10,000 times your stake, whenever you form 5 Wild symbols in a payline. In reality, you should expect some figures around a few hundred times your bet, and they are more than enough to keep your balance ticking over. 


There are 13 symbols in this 5-reel slot: a Wild, a Scatter, and the other 11 ordinary figures. Their payouts are as follow:

  • The Wild Whale: Pays 10000 times your stake for 5 per payline
  • The Scatter Sea Shell: Pays 500 times your stake for 5 per payline
  • The Shark and the Turtle: Pay 750 times your stake for 5 per payline
  • The Angelfish: Pays 400 times your stake for 5 per payline
  • The Seahorse and the Starfish: Pay 250 times your stake for 5 per payline
  • The Card Suits: Pay from 100 to 150 times your stake for 5 per payline

There are 2 special things that you need to remember in this game. First, all the symbols with the same payouts are interchangeable, which means that 2 Sharks and a Turtle is the same as 3 Sharks or 3 Turtles. Second, any winning combination that contains Wild symbols will be doubled up. For instance, 4 Sharks and a Wild will pay you 1,500 times your bet, rather than the usual 750. Isn’t it lovely?

Where Can You Play?

The Great Blue online slot is a casual yet attractive casino game from the established game developer Playtech, who is famous for some titles such as The Mummy, Ghost Rider, Iron Man 2, Thor, Gladiator, etc. Featuring the underwater theme, this free slot machine brings us closer to the deep blue sea to gaze upon the beauty of aquamarine life. 

This review will guide you through everything you need to know about the game rule and how to win those tempting prizes. However, you need to have a basic understanding of the game beforehand, and what’s better than trying the slot by yourself? The demo version is available right here on this page, no fees required. Follow the instructions and enjoy the Great Blue slot free play before continuing with the rest of this review. After that, you can try some other slots online to explore different valuable games. 

How to Play?

The gameplay of the Great Blue is the same as most slot games nowadays: Choose your preferred bet level, press the spin button to play, or use the autoplay function instead. This section will briefly explain the function of each setting and how to play the game.

  1. Before spinning the reel, you need to choose your bet level. As mentioned above, you can change the active paylines or the bet per line by pressing the (-/+) on each side of the setting.
  2. Pressing the Spin button will start the reels. You cannot skip the animation by any means, thus Playtech is inferior to its competitors in this aspect.
  3. You can activate the Autoplay function to spin the reels automatically. The number of auto spins can be chosen between 10, 25, 50, or 99.
  4. The Info button on the left of the options bar will provide all the necessary details about payouts, game rules, paylines, and other features.

In-Game bonus feature

Aside from the usual Wild symbol and Free spins feature, the Great Blue offers the Gamble function, somewhat similar to that of Aristocrat. 

Wild Feature

The Wild symbol in this game is represented by an image of a killer whale, a cute but deadly creature of the ocean. The Wild Whale can substitute all other symbols except for the Scatter, and double up the payout received. Furthermore, the Wild always comes stacked, which means that your chance of winning is also multiplied.

Gamble Feature

Similar to the Gamble function of Aristocrat, Playtech offers their own version. The only difference is that you can only choose the color of the folded card, not the specific suit, hence your wins can only be doubled up to 5 times. Nevertheless, you will lose everything if you guess wrong on any round.

Free Spins Bonus Feature

The Free spins bonus can be triggered by collecting 3 or more seashells in one spin. Once entered the bonus game, you will be given 8 free spins and a 2x multiplier. Afterward, you can choose 2 out of 5 seashells for additional free spins and multiplier, up to a total of 33 free spins and/or 15x multiplier. Moreover, the free spins can be retriggered during the bonus rounds, and there are no limits to the number of spins you can win. Did you feel the heat yet?

Theme and Graphics

This Playtech title was released a long time ago, so the graphics couldn’t compete with those newer slots. Using the common underwater theme, Playtech really wants to play it safe here with a blue-ish backdrop behind the reels, embellished by streams of bursting bubbles. The symbols are good but not too great: All the shapes are colorful and clear, but not in high definition; The Card suits look like some jellies out of a candy store while the fishes resemble the kid’s teddy bears. The audio, on the other hand, is decent enough to enjoy. All in all, Playtech has done a pretty good job with this classic title.

Expert Verdict

Overall, the Great Blue has its own edges and drawbacks. The theme and graphics are not new and attractive, but the intriguing gameplay more than makes up for it. Being a high variance slot game, it may take a while for you to get some decent prizes, but believe me, it will worth every second of your time when the fishes start swirling. Try out the free version slot for yourself and have your own judgment.

Great Blue: Paytable 1
Paytable 1
Great Blue: Paytable 2
Paytable 2
Great Blue: Paytable 3
Paytable 3
Great Blue: Reels screen
Reels screen
Great Blue: Win screen
Win screen
Great Blue: Gamble feature screen
Gamble feature screen

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Game FAQs

You can fully enjoy this Playtech game for free with the trial version. All you have to do is click on the tab “Play free slot” on the top page and start enjoying it.
With the RTP of 96.03% the Great Blue Game can ensure you net some nice wins.
You can play Great Blue Game for free in your browser and without download.
As a Playtech product, this slot is fair.
The House Edge of this slot is 3%