Alright, Nacho. I finally got out of the dead city and got the sewer door to work. I had to revert back to a previous save and play the whole mission through again from the start. 2nd time through, the final door back to the wasteland worked fine. It was kind of a pain because of the time svck, but a very fun mission so not too bad all things considered, I guess. I was obviously able to complete the mission much quicker the 2nd time around, as well. Good luck!
I tried. Unfortunately, I have no saves from before entering the Dead City. This means I'd need to start the game over - but with BATMAN coming out tonight, I am over RAGE. I have now uninstalled the game and will be selling it. This game is a 70% fail for me anyways. I had high hopes, but I need to learn that if the game is not 100% Bethesda - then, it might likely be crap. Regardless, same happened for me and BRINK - hey, a Bethesda game - but no. Disappointing. Oh, and note to the 'support' gal who answered my email - thanks, but you failed too.
Sorry, id - you failed. No actual multiplayer, limited upgrades - really disappointing. However, I do give massive props to the graphics - very nice to play and look at.
Oh well.... massive fingers crossed for SKYRIM (100% Bethesda).