"Escape the area" is a mission objective in Sequence 5 / Memory: Survival of the Fittest
Walkthrough[edit]
Immediately start up the stairs once the cutscene ends. Blighters will come through the door by Jacob after only a very short while. At the top of the stairs, you will find one Blighter waiting there.
Eliminate that one Blighter and then head out the nearby window.
Just keep to the rooftops and you will have little trouble finding your way out of the restricted zone.