Guardian of Forever

The Guardian of Forever is a special encounter

Gameplay
The Guardian is a giant, ancient-looking time portal that allows the Chosen One to travel back in time before the start of Fallout to break the water chip in Vault 13. After having broken the water chip, a notice reads "the Vault has maybe 100-150 days left of water. This comforts you for some reason."

In the Vault, the Chosen One can browse the overseer's command center. Loot includes Mentats and a unique energy weapon, the Solar Scorcher. Once the player leaves, it is not possible to return.

Behind the scenes
The name of the encounter is a reference to the Star Trek episode "The City on the Edge of Forever."