well, you know that bit where you get the microwave emitter, sad to say that is the reward vault.
No. The vaults are simply a big plot device in the Fallout series. The vaults are used to show the McCarthyism and fear of nuclear war that was occurring in America before the events of the game, and as a starting point in Fallout, Fallout 2, and Fallout 3 to show an unfamiliarity and danger of the Wasteland. But there will be a vault 101 in reality very soon
There are 7 vaults as follows: Vault 87 Vault 92 Vault 101 Vault 106 Vault 108 and Vault 112
vault 77 doesn't exist in the game.
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.
SPOILER: no he is in vault 112 in smith Casey garage
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
No you do not die. If you play fallout 2 it tells you the vault dwellers fate.
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.
south-east of vault 92
Theyre in vault 32
The GECK is located inside Vault 87, North of Little Lamplight, it's only access point. http://fallout.wikia.com/wiki/Finding_the_Garden_of_Eden