KeenGamer: ”The hellspawned castle in Bloodstained: Ritual of the Night is a colossal labyrinth filled with demons. So you can be forgiven if you miss a few rooms. This guide is here to give a visual map of all the rooms, secret or otherwise, in RotN. A guide showing a full map and all secret rooms in Bloodstained: Ritual of the Night! Use our Bloodstained map guide to help you fill out your map and find those last secrets.”
Source: N4G PC Bloodstained: RotN 100% Map & Secret Rooms Guide