From publisher blurb:
You grew up on the dirty underbelly of the city. It is your home. It is your community. It is your identity. You feel the life of the city pumping through the soles of your feet when you run the streets. It gives you the power to jump the rooftops, the guts to navigate the dark sewers and the cunning to survive the grand battle for daily survival.
You are The Street Rat.
The Street Rat is a character class designed for Dungeon World. He has some moves similar to that of a thief, but he is an urban acrobat, a social hacker, a devious fighter, and above all, a survivor.
And he has just enough urban magic to give him the awesomeness he deserves.