Fallout Still Looks Like Fallout, Huh?

The pack is entitled "Old World Blues". A new patch will launch prior to the content to bring “bring improvements to performance and stability in major areas". They're still fixing Fallout: New Vegas then, eh?

The content puts you in the shoes of a lab rat in an experiment gone awry, as you seek to turn the tables on your researchers or join forces to become an even more formidable threat.