Back in early December, Double Fine shared several screens and details
about a DLC pack for its XBLA title, http://www.trueachievements.com/Trenched-xbox-360.htm
). The DLC, titled "Rise of the Martian Bear", will include "80 new pieces of loot to battle the Tubes in 4 defense missions, 2 survival missions, and an all new Boss mission".
Today, they've released a new trailer for the expansion:
"Rise of the Martian Bear" still does not have a release date, nor has a price been announced. As soon as we have those details, we'll be sure to share them with you.