If you're looking for the church cellar key in Atomfall ... If you look around the central room, you'll see a sign above one of the doors listing "Medical" but you can't open the door.

So where is the Church Cellar Key and how do you get into the Atomfall Forgotten Cellar? Here's everything you need to know, including what's behind the door. The short answer is that the Atomfall ...

The Church Cellar Key in Atomfall holds significant importance ... When he keeps his controller aside, he plays football and badminton, reads books, and cooks.