A total of 6 Setter for Mayor Signs can be found in Alan Wake 2, all of them are located in the areas we visit when playing as Saga. When you interact with all of them, a dog - Mayor Setter - will show up on the stage in the Suomi Hall in Watery, and this will happen already in chapter "Return 5: Old Gods". If you do not collect all the signs, he will appear there anyway, only that later, in chapter "Return 6: Scratch". When you pet him, you will get a new charm - Mayor Setter Charm (Effect: Marks all nearby resources and points of interest on Saga's map.)
Once you pet Mayor Setter, you will unlock "The Nice Things in Life" achievement / trophy.
