One of the things we mentioned in a previous hardcore post was the Legendary enemies, and many of you probably assumed that we shamelessly stole were inspired by that idea from Fallout 4. Well, you were right, sort of, as always we did add our own twist onto the idea.
Legendary enemies are special variants of normal enemies that can spawn in specific locations or within enemy groups. Whether or not a legendary enemy spawns in each encounter is determined by chance based on the difficulty of the game and the amount of hardcore modules enabled. Certain scripted encounters/locations might have legendary spawns that are guaranteed.