New maps are as follows
Carnival Desolate amusement park with excellent vantage points for snipers. It's "unlike anything we've ever done before," said Bowling. The map takes place during the daytime and includes all original art and model assets. Bowling added that the team really wanted to include this in the first map pack, but the team needed additional time for polish. It's a fairly large map and includes many set pieces, such as roller-coasters, a fun house, and bumper cars.
Trailer Park Contains tight corridors and condensed areas. Very maze-like with obvious choke points. In context of the game, this map is the living quarters for the people who run the Boneyard level found in Modern Warfare 2's singleplayer campaign. The Boneyard will be viewable in the background.
Fuel Completely unique from the other maps. The setting is an oil refinery and is split into two sections. One area is wide-open for snipers and the other half is a large warehouse with tight corridors.
Two old maps are
Vacants and strike.