User blog comment:Dolten/Call of Duty: Black Ops Achievements/Trophies (SPOILER ALERT)/@comment-3080083-20101002212729/@comment-24.145.18.241-20101005212152

might mean that it don't matter what happened before that point in the story cause zombies is linked to single player...  and you must survive and do objectives to try to escape or something... (i can only wish)