Passage: The end? (How to Survive 2)

I'm at a dead end, and I don't know if I've played the game or not.
Scraffyl probably the last armor of technology aliens, all missions passed, alarms only not an open piece of map behind the cars but there not to pass or it's all over?
Thought to scruff armor aliens and open new missions, (or no warnings in the game)
Spoiler