This one:

Cool. There was one more game. Souls like set in Dharavi. Anyone remember the name?

While ingame. Option > load previous save. It gives you 3 auto save options to choose from.

Exactly, although I'm playing on Expert, I was having a bad time with one boss and I bumped down to expedition difficulty and it was waaaayyy too easy for me so I bumped up to expert again and never going down. What chest? I didn't find any. I have an old key for a door, dunno what's it's used for, no description.