Instructions
Step into the Control Chamber at the end of the game. The narration "But it was not until the end of this long road that the Lone Wanderer learned the true meaning of that greatest of virtues..." plays as you step into the chamber.
Recall the verse in the Bible that your father told you was your mother's favorite passage--Revelation 21:6.
Enter the code "216" in reference to your mother's favorite passage, as found in your pipboy. The purifier is activated if the code is entered quickly, and you will be shown the end scenes in the game.