"So what can you expect with your cash? Well, Treyarch and Activision have four new maps for multiplayer. Nightfire is a map of burned out Berlin. The map is nice and smoky, full of the charred remains of the Berlin city-scape. There's some vertical elements, and lots of places to jump out and shot people in the face.
Knee Deep, which I played the most of, is a jungle map with the Americans versus the Japanese. There's actually a lot going on, with plenty of places to hide and jump out. Snipers can get up on the roofs of villager's huts, but watch out. Sitting in the open is sure to get you shot in the face...with a grenade launcher. I should know. I shot them."