THIS CONTAINS SPOILERS TO THE MAIN STORY LINE
When attempting to leave vault 87, you are captured by the Enclave. Upon escaping their base, Fawkes will approach you, wielding his new Gatling Laser.
When you return to Vault 101, you will find him in a cage in the room you used to have.
There is many hidden quests in Fallout 3 but i there is one when you reenter the vault. (after you father dies) hang around the vault entrance.
vault 77 doesn't exist in the game.
There are 7 vaults as follows: Vault 87 Vault 92 Vault 101 Vault 106 Vault 108 and Vault 112
SPOILER: no he is in vault 112 in smith Casey garage
Just North from Vault 101.
All Vault Tech Vaults in Fallout 3 where made public. You are talking about private shelters that are scattered throughout the Capitol Wasteland.
you have to go through little lamp light & enter vault 87 though an auxilury exit u have to save 3 kids from Paradise falls to get in though and u have to sound the fire alarm in vault 87 to free Fawkes who u follow till he gets it for u
Fawkes. The Deathclaw would have no chance.
If you follow the main story of the game you should be sent to go into vault 87. In there you will meet a super mutant named Fawkes who will help you out. He will also be a companion if you have a good karma level
south-east of vault 92
Yes. Seven vaults exist in Fallout 3. One of them is Vault 101, where your character begins the game. For spoilers as to who or what lives within the remaining vaults, check http://fallout.wikia.com/wiki/Vault .
In Fallout 3 vault 101 is the only Vault still active, every single other vault the people went crazy and then they killed eachother, simply because they wanted to leave the vault so bad because they were trapped in there