Select New Game (Dismiss Tutorial if this comes up).
Scroll right and select 'Open the Gallery'.
Search for 'Ghost Family' and download the family made by 'Misier'.
Select 'Place Household' and choose Replace. After this go to the bottom right and press 'Play'.
Next choose 'Willow Creek' & then 'Streamlet Single'. Press confirm to load up the map.
The achievement should pop within a few seconds.