You Don't Belong In This World!

 is a challenge added by the Fallout: New Vegas add-on Gun Runners' Arsenal.

Obtaining
To complete this challenge, kill 10 Abominations with Katanas, Dynamites, Machetes, Throwing Spears, Throwing Knives, and/or Throwing Hatchets.

Behind the scenes

 * The title of this challenge is a reference to a quote made by Richter Belmont in Castlevania: Symphony of the Night, when confronting Dracula.