When Bethesda Softworks released the first trailer for the Obsidian Entertainment-developed Fallout: New Vegas, there were promises of more details from various magazine covers.
Those promises are coming true, as Fallout fan community Duck and Cover has started poring through the magazines passing on the first details on Fallout: New Vegas. The big takeaways?
You are not playing as a Vault Dweller, but you do run into someone who is, so you're eventually given access to the ever-useful Pip-Boy. The central storyline depicts the struggles between New California Republic vs. Caesar's Legion vs. New Vegas residents. The New Vegas residents are in a good place, too, since Las Vegas was largely untouched by the nuclear war.
Fallout: New Vegas will pander to the hardcore crowd, too. Literally. Fallout: New Vegas includes a "hardcore" mode where characters will be required to drink water to stay alive, ammo will have weight that needs to be managed, healing isn't an instant process and other details that will force players to pay much closer attention to detail in order to stay alive.
By and large, the engine driving the game is pretty much the same. If you played Fallout 3, you're going to be able to jump into Fallout: New Vegas without much issue. VATS has seen some improvements, however, including melee weapons with specialized attacks.
The dialogue system is also getting additional layers of complexity (an Obsidian strong-suit), with a brand-new "Reputation" system that sits alongside the already existing Karma.
More details are being added all the time to this thread on Duck and Cover. Hopefully, the deluge of information means we're going to be seeing much more of Fallout: New Vegas.
Source: Duck and Cover