when you pick robots as how big town should defend themselves. the residents take you to a broken robot in their scrapyard and you have to select it and get it to work again. they will then go to another robot and build it themselves. you should stay at the town for a while though or the super mutants will kill them all. after you help them defend the town they are safe and you can leave.
You can not get Shorty to join you; However, you can get him to follow you temporarily from the quest (Big Trouble in Big Town), where you have to save him and Red to complete the quest.
around the level 10 or so, you can travel to megaton or vault 101 and you will trigger a distress call, then it will add the quest
Yes, it is possible to gain access back into Vault 101 on Fallout 3 for Xbox 360. In fact sometime after you escape there is an optional quest where Amada needs your help because "chaos" is happening.
only for some, you can go back to the pitt, point lookout, and I think you can go back to were you do broken steel but i haven't tried yet.
I got right in when i did it. Did you try to open it by the control panel to the left?(i think its on the left or might be on the right)
After completing the last quest in the series her dialogue will no longer change; once you leave the Vault I believe it is locked behind you.
you don't.
a quest
rivet city, gnr building plaza, megaton, vault 101 (temporary for quest trouble on the homefront), paradise falls (no house) more to come if i remember just got fallout new Vegas wish me luck :D
If you are talking about the "Trouble on the Homefront" quest its after you complete Project purity. Travel to a relative distance from 101, Megaton for instance, and you will hear the Vault 101 distress signal on you Radio, listen to it and you will then know what to do. Good luck.
You can not go back in and out of Vault 101. After you first leave the Vault the only time you can go back in is for the quest "Trouble On The Homefront." but once you beat that side quest you are not allowed back in Vault 101 ever.
just continue on with the main quest and you'll be able to do it.