The artwork consists of the trio escaping a large boulder, possibly referencing Raiders of the Lost Baaaa'rk. Lost Underground introduces many mechanics, such as TNT, elevators, mine carts and water. It follows the adventures of the trio escaping after they have fallen into the caves through a booby trap while exploring abandoned housing in Shear We Go Again. Once a level is completed one ahead will be unlocked. In Home Sheep Home: Farmageddon, only the first two levels are unlocked.
It is instantly unlocked in Home Sheep Home 2.
It is the first main chapter in Home Sheep Home 2 and second main chapter in Home Sheep Home: Farmageddon Party Edition after Lost On The Farm. Lost Underground is a main chapter in Home Sheep Home 2 and Home Sheep Home: Farmageddon Party Edition.
