GameSpot writes: "It's difficult to ignore that this brand is growing at an extremely rapid pace. The video game series has sold more than 2 million copies since last October. It's free-to-play on the PC, but if you pay a premium (which hasn't been announced) you'll have access to more features and the ability to use your kibble coins to buy clothing, food and accessories. Littlest Pet Shop: Online will be available to play mid-September".