Great Blue

Playtech’s Great Blue online slot is about the inhabitants of the underwater world. The game was released in 2012, but it is still popular with gamers, thanks to its simple rules and high payout ratio.

About the slot

The five-reel machine has three rows of symbols. The player can adjust the number of active strips from 1 to 25 and bet on each from 0.01 to 2 credits in online casino currency. Prize chains are counted from left to right of the leftmost reel, and for some symbols are considered winning combos of just two of the same icon! If you play Great Blue for money in online casinos, the payout is determined by multiplying the line bet by the odds for the corresponding combination. The RTP is 96.03%.

In older versions, the machine allowed you to run the risk game after each win – on the Internet you can still download videos with an active Gamble function. Now there is no doubling round in the slot.


Theme and design of the slot is reminiscent of Dolphin Quest from Microgaming, as well as popular machines Dolphin’s Pearl and Orca from Novomatic. In the latter, as well as the slot from Playtech, the most expensive symbol is the image of an orca. This icon in the game got the role of the wild. The secret of this special symbol is that completing the prize chain, it acts as a multiplier – the wild doubles the payout.

Another feature of using the wild in the game, which the developer does not focus on in the rules, is the appearance of special symbol stacks of 2-3 icons. This increases the chances of prize combos, both in the standard game and during free spins.

Symbols with underwater sea creatures appear as bright spots on the blue reels. High payers include the yellow fish, purple starfish, orange seahorse, green turtle and grey shark icons. Low paying symbols are represented by the card values 9, 10, J, Q, K and A.

Bonus Game

The Sea Shell Bonus round is triggered by three or more scatters anywhere on the reels. The player is awarded 8 freespins at once with a multiplier of x2, but before the free spins start the number of freespins and the multiplier can be increased.

On the new screen, the gambler sees a small area of the seabed where 5 pink shells lie on the sand. The player has the right to open two shells, in which additional freespins or multipliers can be found. Thus, the number of free spins can be brought up to 33, and the multiplier is up to x15. After that, the reels reappear on the screen and the bonus is played. During the bonus spins, between 3 and 5 scatters can again appear on the reels, increasing the freespins series.

Game machine interface

Like all Playtech machines, the slot is simple to operate. On the bottom panel under the Lines and Line Bet buttons are located to adjust the number of active strips and linear bets. Users can activate the automatic rotation of drums for 10, 25, 50 or 99 spins.

When the Turbo button is enabled the reels spin faster, and some visual effects are turned off. Full demo allows you to play Great Blue slot machine for free and without registration.

Pros and cons

The high maximum payout ratio and the drawing of additional bonuses before launching the freespins make the slot machine attractive to experienced gamblers and newcomers to online casinos. Despite its simplicity, the slot is well equipped: even in normal mode, stacked wagons with doubled payouts give you the chance to win impressive amounts.