The Dark Room can also be accessed by repeatedly using a Sacrifice Room. After completing this level or the Chest for the first time, the Dark Room will always contain a large golden door in the first room, which can be unlocked with either the Key Pieces (combination of Key Piece 1 and Key Piece 2), Dad's Key, Get out of Jail Free Card, or Mr. Entrance to the Dark Room can also be achieved via the I AM ERROR room in Sheol, even without The Negative, as well as through the Black Market in Sheol, and through a trapdoor spawned by a button. The Dark Room is unlocked by defeating Satan 5 times, after which it can be accessed by touching the chest dropped by Satan with The Negative equipped. The Dark Room is one of five final levels in The Binding of Isaac: Rebirth, alongside the Chest, The Void, the Corpse, and Home.
