Despite being leaked to the internet yesterday, the official download is now available for PC gamers that own Call of Duty 4. The map pack is being sponsored by Nvidia and being provided free of charge.

Click Read More for more details.

From the press release:

"The Call of Duty 4: Modern Warfare Variety Map Pack features four new multiplayer maps including “Broadcast,” featuring tight corridors and wide open parking lots where large groups will utilize close-quarter fighting and strategic maneuvers; “Chinatown” where night battles well lit by the full moon can play havoc against a backdrop of brightly colored lamps, antique shops and neon signs of the local district; “Killhouse,” a desolate warehouse under enemy attack where squads will need to move through building mock-ups and plywood walls in order to take control of the combat arena; and “Creek,” a wide open village in a heavily wooded area where battles are fought among high ridgelines and deep in underground caves."

You can download the official patch from Nzone.com.