On the outside it's a basic shack, but behind the hidden door there is a staircase to a hidden bunker. Descend to the decontamination zone, before delving further to the living zone and then downward to the bedrooms. At the bottom of it all, there is an extra storage room that can also be used as an emergency hide out or the kids spare room. #thesimsupply #basegamebuildsforsemaj #bunker