http://www.ign.com/articles/2013/12/03/potential-fallout-4-teaser-site-updated

A mysterious teaser site that many assume is for Fallout 4 has been updated to include the phrase "Nuclear winter has come".

TheSurvivor2299.com was updated earlier today to include the new words, just above the countdown that's set to expire on December 11.

While it certainly lends credence to the notion that we could be about to see Fallout 4 revealed imminently, there are a number of potential problems that suggest it could be for a different game entirely.

Regardless, with just over a week until the countdown clock expires, we'll find out for certain soon enough.

A "nuclear winter" sounds good.