Aqua Kitty: Milk Mine Defender is the free mobile game this week, as part of Sony’s six weeks of free mobile game promotion. Only two weeks left to nab some freebies. In the game, cats are apparently facing a shortage of milk, so they have been forced to “take to the high seas” for new sources of the breakfast staple. The game is available free in both North America and Europe. A teaser video is below.