Arriving in February 1st to Xbox Live, First Strike will contain 4 multiplayer maps and 1 Zombies map. Berlin Wall is set at Checkpoint Charlie, the well known crossing point between East and West Berlin. Discovery is a German research station in Antarctica, abandoned from World War II. Kowloon is inspired from the campaign and is a ray rooftop map. Last but not least is Stadium, an athletic complex/hockey rink set in Northeastern United States.
Dan Bunting was tight-lipped about the new Zombies map, Ascension. Definitely looking forward to this map what with the air of mystery surrounding it.
Remember, First Strike drops on February 1st for 1200 Microsoft Points.