Dubbed 'First Strike,' the pack of five maps will launch on February 1, 2011, priced at 1,200 Microsoft Points ($15). As per Microsoft's arrangement with publisher Activision, it'll be released first on Xbox 360. Call of Duty: Modern Warfare 2 map packs released under the same arrangement took around a month to make it PC and PlayStation 3.

"We learned a lot of lessons in the development and design of the maps on the shipped game," developer Treyarch's director of online Dan Bunting explained. "For DLC we really wanted to go bigger with some of the things we learned that people liked. We focused a lot more on providing variety of weaponry, variety of engagement types, variety of verticality--a lot more verticality, bringing some sniper opportunities into it."

"One of the popular things we've added in several of the maps in the shipped game were the scripted moments, scripted elements and interactivity" he added, "so that's something we've made sure we wanted to bring to every single one of the new maps.

The five maps are:

Multiplayer

• Berlin Wall: set around the Checkpoint Charlie crossing in divided Berlin.
• Discovery: German research base in Antarctica, abandoned since World War 2.
• Kowloon: on the rainy rooftops of Kowloon City in China, drawing inspiration from the single-player.
• Stadium: a hockey rink in the North-Eastern USA.

• Ascension: still classified information, apparently.

"$15 for that?" you might scoff. Scoff all you want! The first MW2 DLC pack racked up over one million sales on Xbox 360 on launch day alone. Given that the base game of Cod Blops broke MW2's one- and five-day sales records, it's a fair bet that First Strike will sell more than a few copies. Doubtless, Activision will kindly and loudly inform us of how well it sells.