“Your savvy at mutant killing grants you a bonus to killing them.”
- The player needs to kill 50 super mutants.
- Player must kill 50 nightkin/super mutants per rank of the perk.
- The challenge gives 50 XP upon completion and unlocks the perk Mutant Massacrer.
- Bonus damage against super mutants and nightkin.
- The challenge has three ranks, each with 50 enemies to kill.
- The challenge will appear in the the Pip-Boy's menu as soon as you kill your first super mutant.
- The perk is of limited use due to the game's general lack of hostile super mutants.
- The super mutants and nightkin between Neil's shack and the top of Black Mountain re-spawn every 3-4 game days.