"It’s just one run," Leo whispered to the empty room. "One run with Tainted Lost. No hits. No mistakes."
: While some players report it being slightly glitched, you generally need to encounter and defeat every enemy and boss to fill the Bestiary.
: Complete the "Post-it" note for every character on Hard Mode.
You must have physically picked up every item in the game at least once to fill the "Items" collection page.