??? Entrance is an unlockable room in The Binding of Isaac, added in the Afterbirth DLC.

A room containing the entrance to the ??? (Blue Womb) floor that leads to the Hush fight.

Only appears in Mom's Heart/It Lives!'s Boss Room if the boss is defeated within 30 minutes.

The door remains open as long as 30 minutes have not passed.

The 30-minute timer can be bypassed by using Mama Mega! or Mega Bean inside the Boss Room, or by holding Strange Key.

This page shows information as of the latest Repentance release.
To see latest up-to date information about this room for the new Repentance+ (Online Co-op) DLC, check this page instead.

Defeat Mom's Heart for the 10th time.

The ??? Entrance does not have an associated item pool.

• Check out the room description on the external Isaac Wiki.