Fallout New Vegas, is a completely new game!
And yes, it's exactly the same size of Fallout 3.
This time, Bethesda aren't the makers of the game.
It's Obsidian, yes that's right. No Bethesda in here.
"You were a nobody---just some poor schmuck minding your own business as you eked out a meager existence in the post-nuclear Nevada wastelands of the year 2280. That business: schlepping miscellaneous packages from point A to point B for a few caps. So it just isn't very nice when an unknown assailant up and shoots you in the head, steals the mysterious package you were carrying and leaves you to die in a shallow desert grave (a Las Vegas tradition for 350 years).
That traumatic brain injury must've trigger a Phineas Gage-style personality change, because days later you wake up in the town of Goodsprings as a somebody- the adventurous type, ready to take on a huge, dangerous world full of giant venomous scorpions, Gremlin-like geckos, roving slavers, heavily armed super mutants, monstrous deathclaws...and some jerk with a smoking gun in one hand and your package in the other. While you initially set out who ganked you and return the favor in glorious, gory slow-motion, the personal quest will soon drag you into a larger series of events that will decide the fate of Nevada wastes. For better or for worse, it's up to you."http://www.youtube.com/watch?v=epFupigyIN8Victor, the robot in the video, apparently find's your body, and carry's you to a doctor in Goodsprings, named Mitchell, he equips you with his PipBoy-3000, and gives you a Vault 22 suit.
Through-out the whole game, you are known as "
The Courier".
More info on Fallout New Vegas here:
http://fallout.wikia.com/wiki/Fallout_Wiki