I buy CDs either during a sale, or for all sorts of points in AliExpress or Amazon, and it turns out not to be too expensive. I am very happy with the purchase, and it is lovely to spent the evening playing on the sofa, rather than on a chair in front of the computer. Now that World of Tanks is available on Sony, which is a huge step in the right direction, I had no trouble getting acclimated to the controls, but it is challenging to play using only light tanks.