Console Monster writes: "We have just added the new Achievements for Call of Duty: World at War on the Xbox 360.
The achievements have been added to the game to coincide with the release of the Map Pack 2 on the Xbox Live Marketplace.
The "Soul Survivor" achievement seems to be the hardest of the new achievements which requires players to reach round 15 in Nazi Zombies without getting revived. It rewards nicely with 50 GamerScore.
10 new achievements have been added worth 250 GamerScore, 1 of which is a secret achievement. The list now contains 56 achievements worth 1250 GamerScore..."