Gnome #11 - McDonald
Location: Driscoll Farm
Gnome #11 is called "McDonald" and can be found, appropriately, at Driscoll Farm behind Mrs. Driscoll's house near the large maze full of rats in Stranger Things 3: The Game. You'll need to use Lucas' special attack ot make it through the boulders.
Gnome #12 - Clint
Location: Melvald's General Store (Hawkins Square)
Gnome #12 is called "Clint" and can be found at Melvald's General Store. To get it, you'll first need to unlock Joyce and add her to your party in order to open the door to the back of the store using Joyce's Bolt Cutters in Stranger Things 3: The Game.
Gnome #13 - Marty
Location: Hawkins Hardware (Hawkins Square)
Gnome #13 is called "Marty" and can be found between store shelves in Hawkins Hardware in Stranger Things 3: The Game.
Gnome #14 - Mikhail
Location: Hawkins Square
Gnome #14 is called "Mikhail" and can be found near Town Hall. Destroy the bushes to the right of the entrance to make this Gnome easier to find in Stranger Things 3: The Game.
Gnome #15 - Denver
Location: Driscoll Farm
Gnome #15 is known as "Denver" and can be found behind the Barn at Driscoll Farm. To get it, you'll need to go through the Barn, then take the side exit in Stranger Things 3: The Game.
Gnome #16 - Drago
Location: Hess Farm Underground
Gnome #16 is called "Drago" and can be found in the underground area beneath Hess Farm. This Gnome is located near the area you explore to complete the Four Bears Puzzle and requires you to craft a Makeshift Crank to open a locked door near the top edge of the map in Stranger Things 3: The Game.
Gnome #17 - Fletch
Location: Abandoned House (Hawkins Suburbs)
Gnome #17 is called "Fletch" and can be found in the Abandoned House in the Hawkins Suburbs. Note that you'll need to unlock Erica in order to crawl through the vent area and reach the computer puzzle that opens the door to the hidden area. The puzzle can be solved by keeping in mind that the number represented by "X" is 7 in Stranger Things 3: The Game.
Gnome #18 - Christine
Location: Hawkins Suburbs
Gnome #18 is called "Norman" and can be found behind Granny's House in her backyard as you run errands for her in Stranger Things 3: The Game.
Gnome #19 - Herbert
Location: Granny's House
Gnome #19 is called "Herbert" and can be found inside a secret room in Granny's House. As you run errands for her, you'll be able to open up and explore new parts of her home, do this to grab Gnome #19 in Stranger Things 3: The Game.