Great Blue is an online slot developed by Playtech that’s based on an underwater theme. The bonus round is triggered by landing 3, 4, or 5 of the scatter symbols anywhere in view and awards up to 25 free-spins with a multiplier of up to 15X. Stacked wilds are present in both base-game and free-spins.

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Great Blue is part of the 25 line range found at Playtech powered casinos. It is an action packed game with stacked wilds and has one of the highest free spin multipliers we have seen online. You can win up to 33 free spins with all wins multiplied by 15 - this makes for some giant jackpots.

Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Great Blue is one of a range of high quality slot games that have been launched by Playtech over recent years. It's a 5 reel and 25 pay line game with slick graphics and an entertaining soundtrack- all based underwater, of course. There is a huge betting range on this.

The game has an undersea theme with symbols such as sharks, turtles, fish, sea horses and whales appearing on the reels. The whale symbol is wild and appears in stacks of three. This means it is possible to get a whole screen of wild symbols which was first seen on games like 50 Lions from Aristocrat.

Max bet on great blue is 250 coins per spin so you are looking at at least $2.50 per spin if you want to play max bet. You can of course bet more and there are several coin sizes ranging from 1c to 50c.

As usual the wild symbols are the highest paying with five wild whales paying 10,000 coins multiplied by coins bet per line. With a max bet of 10 coins per line this pays 100,000 coins. The wild also doubles any win it is a part of so this makes it even more important.

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The 100,000 coin jackpot alone is among the highest in this category but there is a way to win an absolutely gigantic 2,500,000 during the base game. This is because the wilds are stacked so if you get a whole screen of wild whales you win the top jackpot on all 25 lines!

The scattered shells are the ticket to even bigger winnings. Get three, four or five anywhere on the reels and you win the free spins. Once activated you move to a bonus screen where you have five shells. You get to pick two to add extra free spins or higher multipliers to the initial 8 spins with 2X wins. You can win as many as 33 free spins and multipliers as high as X15 (Screenshot).

Now the jackpots on the base game are already huge but Great Blue has set a record for a non progressive slot. If you manage to get a whole screen of stacked whales and have the highest multiplier you will win an earth shattering 37,500,000 coins. Even at the 1c coin size this is $375,000! Play at the 50c coin size and this jackpot is a life changing $18,750,000!

If the standard wins are not big enough for you Great Blue has an extra way to win with the red / black double up feature. After a win simply click the gamble button and you can try your luck at doubling up your win.

Great Blue has the biggest non progressive jackpots of any online slot game. The stacked wilds and big free spins feature make it a top pick. If you are looking for big jackpots and great features then Great Blue is hard to go past.