Free Great Blue online slot in your web browser. Great Blue casino game from Playtech just for fun or find the best online casinos and play Great Blue with real. Try this no-download version of the popular Great Blue slots game for FREE! Great Blue offers great graphics and an overall good gambling experience and you. Below is a free play version of Playtech's superb Great Blue slot, a cult game, along with information on where it can be played for real and the max bet sizes.