fallout 3

in 2227 you the lone wanderer are born in vault 101. everything is all good until in 2246 when your dad mysteriously leaves the vault you the brave 19 year old vault dweller leave the vault to go see where your dad has gone. on your adventures you find out that your dad was a key scientist on project purity. purity was supposed to purify the waters in Wasington dc. eventually you are caught up in a battle between the brotherhood of steel and the enclave, both groups want control of project purity. you eventually destroy the enclave and help the brotherhood of steel purify the waters.