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The Undersea Orca Classic from Playtech!
Also with a Jackpot Version.
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What is the Great Blue Slot?Great Blue is an oceanic five-reel and three-row slot machine from Playtech with twenty-five pay-lines and an Orca (Killer Whale) as its star symbol. You’ll also see Fish, Sharks, Seahorses, Starfish, Turtles, Pearls and playing card numbers.
Features include a bonus game with Free Spins, multipliers, a Gamble Game, scatters, stacked symbols and wilds. The game was launched in June 2013 and has an RTP (Return to Player) of 96.03%.

Well, it’s pretty blue of course! Great Blue is an “Under Sea” slot that’s full of bright colours, soothing sounds and easy-on-the-eye graphics- a real mood lifter that can go from calm to crazy with the click of the spin button!
Let’s dive into this slot game and spin some orcas.
Playtech’s Great Blue is one of those games for those who want to kick back and watch the aquatic world cruise by until the action gets underway that is. And then the pace can pick up quite a bit.
The underwater world is a theme that we have seen many times before with games like the Ariana slot machine and Mermaids Millions. Great Blue is up there with the best of them, themed on an ocean world that is full of slot treasure. Hopefully, you will line your pockets with some treasure.
Despite its calm vibes, Great Blue is a high-variance game like the Marilyn Monroe Slot. These games have been built to be volatile, so things can go pretty crazy every so often, although you might also run into some lean periods, so buckle up and plan your betting accordingly.


Playtech’s Great Blue is themed on a huge orca and this slot packs a punch with a solid bonus feature and stacked Wilds to keep the action coming as long as you keep those reels spinning.
While a blue world can be relaxing, this slot also offers up some high volatility gameplay, which fans of games like the Diamond Queen slot will be familiar with. Just make sure you’ve got your bankroll plan ready, as it may not be plain sailing. But for the brave, it could land you with some nice wins.
The background to this slot is the blue ocean with bubbles rising in the background, (that’s the soothing bit). The reels are transparent and you will mix with a whole ecosystem of sea creatures on the reels.
The background music to play is upbeat with a high-energy vibe that suits the high volatility of the game.
The high value creatures that inhabit the reels are a turtle, a shark, a seahorse and a starfish and these marine animals are accompanied by the lower-value icons of play, the Ace through 9 of a playing card deck.
The game’s Wild is the Great Blue orca of the slot’s title, and he can be a generous creature. The orcas can stack over an entire reel, making for more winning combo opportunities. And when the orca is part of your winning combo he will also double your win.
The Wild symbol subs for all icons except the Scatter which is an oyster containing a big pearl.
The slot’s feature bonus is triggered by landing three or more oyster Scatters onto the reels. You’ll get eight free spins with a 2x multiplier in play.
First up you’ll get a new screen where you will play a picking game. Here you choose to open two out of the five oysters on display.
These shells have some generous treasure in them with a cracking 15x multiplier hiding in their midst, as well as 33 free spins that are up for grabs. This is a high-variance slot like Immortal Romance – make no bones about it!
Also, the Great Blue stacked wild comes into play in the free spins round, so your theoretical maximum win from the free spins is 100x or more. Treasures of the deep!
The other great thing about the free spins round on this game is that you can re-trigger the bonus from within the feature. That is one of our favourite features on a slot by the way.
If you like to take your game to another level, there’s also a gamble feature. We’d play this sparingly if we were you. Best to bank your wins while you can.
There are two versions of this game: the original (and most popular) and the Jackpot version which has a slightly lower RTP (95.02%). And that’s because some of your bet will contribute to a series of four jackpots that can be triggered at random while you play.
If you manage to trigger the Great Blue Jackpot feature, you will head into a jackpot bonus game, where you are guaranteed to win one of four progressive jackpots. Pick from a collection of coins. Match three and you win the associated jackpot, which are the Fish, Turtle, Shark and Whale jackpots in order of importance. Good luck!
The Great Blue slot remains one of Playtech’s most popular games along with the Age of the Gods slots despite its age.
But, don’t forget, even though it has a chilled vibe, Great Blue is still a medium to high variance slot, so play carefully. It can take over 500 spins to hit the free games bonus.
If you like a medium to high-variance slot, you can also try Punk Rocker from Play ‘n Go- the graphics aren´t quite as “whizzy”, but it’s also a good solid slot game.