Slither Kin

 is a mentioned faction. Before they became the Omertas, they roamed the wasteland killing everybody they found and tricked people a lot. One day in 2274, they were approached by a squad of Mr. House's Securitrons. They agreed to join House and lived on the New Vegas Strip, became the Omertas, and took control of the Gomorrah.

Appearances
are mentioned in Fallout: New Vegas.