The bomb necklace is on you in New Vegas DLC

In just few days, following the release of the comprehensive patch, Fallout New Vegas will be getting its first DLC titled Dead Money, which tells the story of you and three other trapped wastelanders facing new terrain, foes, and choices in a search and recover mission of the Sierra Madre Casino treasure. You succeed, you’re free. You fail, you’re dead.

Dead Money will be available on Xbox 360 on December 21st.