New answers tagged fallout-3
I know this is years after the game was released but I'm finally playing through it and you can place the observer on the first level in any of the egg clutches hidden behind closed doors before you get into the memorial itself.
Yes, you can find keys in lockers around the room you confront him. Grab the keys to the office and you can then unlock the Vault door. There is a wiki page which has more details on how to escape. http://fallout.wikia.com/wiki/Escape!
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