I've gone through the Defib upgrade mission, grabbed the upgrade which caused a hole to blow in the wall and release some mutants. Killed them, looted the places, went don't some stair and the exit door is closed. I checked back as far as I was allowed to go, which is the entracne chamber before the lab where the defib was. Looted everything and the door is still closed. I even went back to a previous save and replayed from the "Giant Mutant" part...same deal...
Any ideas? I looked at a walkthrough on YouTube and it looks like that door next to the painted skull should be open allowing access back to the Wasteland...
Thanks
JAY