The Call of Duty: World at War site has just updated the details on the new Map Pack, revealing 4 new. The zombie map will come with 10 new achievements/trophies.
The 4 maps vary from the dense tropical swamps of Japan to an old Russian Train yard.
Included as one of the new maps, "Shu Shi No Numa" translated as Zombie Swamp. This new map will have the players moving to survive the unending Zombie horde the all new addition to the four player co-op fan favorite. Imperial Zombies rise from the misty swamps and flaming Hell Hounds. Included with the new Zombie map are 10 new Achievements/Trophies.
Map Pack 2:
Shu Shi No Numa