Fallout : New Vegas

The game's scenario is in Las Vegas, Nevada, at the same post-apocaliptic realm of the previous games of the series. However, the city was not stricken direcly by a nuclear attack like other American cities featured in the Fallout universe, thus the buildings and vegetation is mostly intact despite there are still the presence of mutated humans and creatures.

The city is divided among three main factions: The New California Republic, based at the McCarran Airport, the Caesar's Legion based in the Las Vegas Strip, and the residents of New Vegas. Other landmarks featured in Fallout: New Vegas include the Hoover Dam, which is still active and supplying power to the city, and the Area 51.

Bethseda say this isnt a "Sequel" but just a new game to the fallout universe.On the story front, you play a courier, "wounded and left for dead in a shallow grave." A former vault dweller/doctor named Mitchell and his friendly robot Victor (the one we saw in the teaser, presumably), find you and fix you up, and the doc gives you a Pipboy. The plot focuses on the conflicts between factions: the New California Republic, Caesar's Legion, and New Vegas locals.