InsaneJournal

Level: Post Hogwarts Advanced
Subject: Hogwarts Magic

The Room of Requirement is a magical room which can only be discovered by someone who is in need. It is called the Come and Go Room by the house-elves of Hogwarts. The Room is located on the seventh floor, opposite a tapestry showing Barnabas the Barmy trying to teach trolls to dance the ballet. To make the Room appear, a person has to walk past the section of blank wall three times concentrating hard on what is needed. ~ Lexicon

Game Canon
+ The room can transform to accommodate whoever is using it.
+ When occupied outsiders must want to enter the room already in use or doors don't appear.
+ Items brought into the room remain there till removed.
+ Items can be conjured in the room, but perishables don't have substance.

+ Additional Game Info