Forged

Forged are a faction appearing in Fallout 4.

Background
The Forged are similar to Raiders, set apart only by their small numbers and fanatic obsession with the destructive power of fire. These enemies can only be found in and around the Saugus Ironworks, and they'll attack any and all trespassers on sight.

By accessing terminals spread throughout the building and if the sole survivor saves Jake in the bossroom you can learn the backstory about the Forged. Apparently the leader Slag came from outside the commonwealth looking for recruits to form a new gang. Initially the process seemed to have been slow with many failing the gruesome initiation rituals. The number of recruits increased though after the Forged killed many of the notorious Gunners in combat.

Appearances
Forged appear only in Fallout 4.