Omertas

The  is a faction that controls a section of New Vegas.

Background
The Omerta are a somewhat shadowy faction who control the Gomorrah casino. They're based on the Mafia.

Appearances
The appears in Fallout: New Vegas.

Behind the Scenes
Omerta is the code that mobsters lived by. It means that mobsters wouldn't rat each other out to the police, it is basically the mafia's code of silence.