GURPS Goblins is set in a city, where every square inch has been trod by one and a half million pairs of feet, and all obstacles are marked on a handy street map. The ruins and dungeons are far from uncharted - the only creature who never explores them is the landlord who rents them out. The magic is dubious. The technology isn't astounding.
There are however plenty of monsters, in every conceivable shape and size. They live in the characters' houses; eat their food; buy groceries at the same market. Many of them are relatives. The characters of GURPS Goblins roam well-worn, familiar streets in a sea of unwashed, diseased rogues and villains. The characters are unwashed, diseased rogues and villains. They seek the same elusive treasures that all do - gin, glory, and bags of money.