The wiki says that for the exploration score you only need to reveal all hidden doors, items, open all containers (except crystal chests), solve all puzzle rooms, complete sacrifice rooms, etc. You don't need to explore boss rooms fully afaik.
The wiki says that for the exploration score you only need to reveal all hidden doors, items, open all containers (except crystal chests), solve all puzzle rooms, complete sacrifice rooms, etc. You don't need to explore boss rooms fully afaik.