November 6th, 1983.
Overworld, once an peaceful place where animals lived at their kingdom, where mobs danced at midnight, had gotten upside down.
1:1 REPLICA of the overworld! (except structures and biomes)
Get a death from a Demogorgon to enter the upside down!
No mobs in the upsidedown!
Be careful from lightnings in the upside down!