Activision has released a new movie from First Strike, a Call of Duty: Black Ops add-on set to launch worldwide on Xbox LIVE on 1st February. This downloadable content features four new multiplayer maps, including Berlin Wall, Discovery, Stadium and Kowloon, and a new Zombie map called Ascension. For Silver Xbox LIVE members who haven't yet experienced Call of Duty: Black Ops multiplayer, Xbox LIVE will host a Multiplayer Unlock event running on 28-30th January for new fans to join in