mrstickball on 09 March 2008
That's not the 5 and 7 day Survival achievement.
Last I checked, the spec. ops never came in when your doing Infinite mode. Your talking about Survival and Overtime modes - which play into the story.
Infinite mode is an open-ended mode where you have an ever-diminishing lifebar, and have to survive in the mall for as long as possible, without saving.
Back from the dead, I'm afraid.
