You enter the game with an automatic 8 free spins and 2x multiplier. You first get a set of 5 pink seashells to pick from. Here you'll pick 2 to get anything up to 33 free spins and 15x multiplier. As explained in the main review the number of free spins and multipliers tend to equal out, but the potential for big wins here is huge. Great Blue Slot features wild and scatters symbols, a bonus game with multipliers, and star slot online a gamble feature. There aren8217;t many other features in this slot, which fits ocean life8217;s tranquil theme. Great Blue is one of the most popular Playtech slot machines and it has been around for some time and is still played a lot. Great Blue Slots is a 5 reel 25 payline game that has a great under the sea theme and cool underwater sound effects.