Great Blue is a slot machine with 25 lines and 5 spinning reels. Thanks to the images and sound effects used we can see the marine world come to life. Like in case of every other slot machine the aim is to spin identical symbols. There are special symbols which offer free spins and extra prizes.
The number of pay-out lines can be set with Lines button from 1 to 25. Beside it, there is Betting per line where we can set the bet placed on the lines. After initial settings all you need to do is to start the game with the Spin button and hope for identical symbols. Max Bet will automatically play all lines with the actual line bet. With the plus/minus buttons above Auto start you can set automatic mode.