The brothers Mario and Luigi live in the Mushroom Kingdom, where they must rescue Princess Toadstool (later called Princess Peach) from Bowser. The game consists of eight worlds, each with four sub-levels. Though the worlds differ in themes, the fourth sub-level is always a fortress or castle that ends with a fight against Bowser (or one of his minions disguised as him). The game was successful, and is one of the best-selling video games of all time. If you are a true gamer then you need these socks.