Lara’s Shadow is the second piece of DLC for Tomb Raider: Underworld exclusive to Xbox 360.
This video is a short trailer for the DLC

The first batch of downloadable content set for release on Xbox Live next week on the 24th of Feb. The content is going to be a whole new episode called “Beneath the Ashes”, and will be around 1GB in file size.

Also next month there will be another episode up for download by the name of  “Lara’s Shadow” Dated for March 20th.

Tomb Raider: Underworld Gameplay trailer: