Fallout: New Vegas - Old World Blues

Backwards compatible DLC.

DLC for Fallout: New Vegas In Old World Blues, you will discover how some of the Mojave's mutated monsters came to be when you unwittingly become a lab rat in a science experiment gone awry. You'll need to scour the Pre-War research centers of the Big Empty in search of technology to turn the tables on your kidnappers or join forces with them against an even greater threat.