Bethesda Software has today revealed the world’s first look at Fallout: New Vegas. Accompanying the teaser trailer is word that the Obsidian developed game is set for a Fall 2010 launch for the Xbox 360, PS3 and PC.

While the teaser doesn’t show off any gameplay footage, the Sinatra and (unusually bright and shiny) Vegas metropolis in the background certainly set the mood. Check out the full trailer and further details after the break!

Bethesda’s official description of New Vegas:

Experience all the sights and sounds of fabulous New Vegas, brought to you by Vault-Tec, America’s First Choice in Post Nuclear Simulation. Explore the treacherous wastes of the Great Southwest from the safety and comfort of your very own vault: Meet new people, confront terrifying creatures, and arm yourself with the latest high-tech weaponry as you make a name for yourself on a thrilling new journey across the Mojave wasteland. A word of warning, however – while Vault-Tec engineers have prepared for every contingency,* in Vegas, fortunes can change in an instant. Enjoy your stay.

* Should not be construed as a legally-binding claim.