Great Blue

High volatility and a respectable return to player percentage are the primary selling qualities of this lovely, albeit simple, undersea-themed video slot.
Great Blue - Playtech -

Great Blue – High volatility and a respectable return to player percentage are the primary selling qualities of this lovely, albeit simple, undersea-themed video slot.

Great Blue RTP 96.03%

Slot functionSlot description
Slot Provider:Playtech
Slot date created:2013
Features:Configurable winlines, Free spins, Autoplay, Quickspin feature
Great Blue themes:
Available on:Mobile, Desktop
Win lines:25

Review of the Great Blue

Theme and plot of the story

Great Blue transports players down to the ocean’s depths in a cartoon-style depiction of the abyss. Play with orcas and great whites, seahorses and angel fish, as you try to hunt down the pearls that will trigger the bonus for a big haul of undersea treasures.

Hundreds of species of marine life may be seen on the reels, each with its own own personality and a smattering of micro-plastic pollution.

Graphics, sounds, and animations are all included.

With each species shown in a way that seems just appropriate for the unique universe that this slot is attempting to portray, the aesthetics are appealing.

Sadly, the animations fall short of expectations, failing to provide much in the way of mood and seeming a touch hurried on top of that. It is not distracting, but more work might have been put forward in this area to make it more appealing.

The slot’s sound design is where it truly falls short of the mark. Even though the spin noises are a brief steel band calypso, it merely seems generic since no additional sounds or background music have been included to assist sell the concept to the user.


All of Great Blue’s gameplay is drawn directly from the playbook for the classic slot machine, Slot Machine 101. With a five by three slot machine with twenty-five win lines and a Free Spins bonus, you have an adequate but boring combination.

There is no chance to win money via gambling, and there are no extra incentives to keep things interesting.

What gaming elements it does offer are well-paced and well-executed, thus this slot will appeal to a wide range of gamers.

Wilds, bonuses, and free spins are all included in this game.

The Wild symbol may be used to replace any other symbol with the exception of the Scatter symbol. Any victories that contain a Wild are multiplied by two, doubling the value of the victory.

When two or more Scatter symbols appear anywhere on the reels, you will get a payout. Three or more Scatters will also trigger a Free Spin bonus.

The Free Spins bonus begins with a multiplier of two times the bet amount and eight free spins. Afterwards, the player must choose five shells, each of which contains a random number of extra spins and multipliers, giving them the opportunity to win up to thirty-three free spins and a multiplier of times fifteen.

Free Spins may be re-activated at any time.

Bet sizes, return on investment (RTI), and variance

The return to player for this game is 96.03 percent, which is almost exactly in line with our yardstick of an average of about 96 percent.

There was a wide selection of bets available on the site we tested, ranging from a minimum wager per spin of $/£/€0.25 up to a maximum stake per spin of $/£/€50.00.

The volatility of this game is considerable, which makes it an ideal fit for our favored slot machine methods, which we will discuss below. We prefer to go for the biggest level of volatility possible.


Great Blue has a lot of appeal, but it also has a lot of volatility and a mediocre return on investment. All of this works in its favor, despite the fact that the gameplay is a touch too simplistic and the game lacks the ambiance that a more rigorous collection of noises and animations would provide.

Overall, we give this one a mediocre rating, while we can easily envision that it may become a niche favorite for the appropriate player.