The game does not have a required story as the player can play any missions, called "quests", whenever they want. The main story involves the player interacting with what used to be the Army, the Brotherhood of Steel, and the evil Enclave, which used to be the government. The player has to either stop the Enclave's mission to kill all mutant people or help them.
ð ə WORD_BOUNDARY ɡ eɪ m WORD_BOUNDARY d ʌ z n ɑ t WORD_BOUNDARY h æ v WORD_BOUNDARY ʌ WORD_BOUNDARY ɹ ɪ k w aɪ ə ɹ d WORD_BOUNDARY s t ɔ ɹ i WORD_BOUNDARY æ z WORD_BOUNDARY ð ə WORD_BOUNDARY p l eɪ ə ɹ WORD_BOUNDARY k æ n WORD_BOUNDARY p l eɪ WORD_BOUNDARY ɛ n i WORD_BOUNDARY m ɪ ʃ ə n z WORD_BOUNDARY k ɔ l d WORD_BOUNDARY k w ɛ s t s WORD_BOUNDARY w ɛ n ɛ v ə ɹ WORD_BOUNDARY ð eɪ WORD_BOUNDARY w ɔ n t WORD_BOUNDARY ð ə WORD_BOUNDARY m eɪ n WORD_BOUNDARY s t ɔ ɹ i WORD_BOUNDARY ɪ n v ɑ l v z WORD_BOUNDARY ð ə WORD_BOUNDARY p l eɪ ə ɹ ɹ WORD_BOUNDARY ɪ n t ə ɹ ɹ æ k t ɪ ŋ WORD_BOUNDARY w ɪ ð WORD_BOUNDARY w ʌ t WORD_BOUNDARY j uː z d WORD_BOUNDARY t ə b i WORD_BOUNDARY ð ɪ WORD_BOUNDARY ɑ ɹ m i WORD_BOUNDARY ð ə WORD_BOUNDARY b ɹ ʌ ð ə ɹ h ʊ d WORD_BOUNDARY ʌ v WORD_BOUNDARY s t iː l WORD_BOUNDARY æ n d WORD_BOUNDARY ð ɪ WORD_BOUNDARY iː v ə l WORD_BOUNDARY ɑ ŋ k l eɪ v WORD_BOUNDARY w ɪ t̠ʃ WORD_BOUNDARY j uː z d WORD_BOUNDARY t ə b i WORD_BOUNDARY ð ə WORD_BOUNDARY ɡ ʌ v ə ɹ n m ə n t WORD_BOUNDARY ð ə WORD_BOUNDARY p l eɪ ə ɹ WORD_BOUNDARY h ʌ z WORD_BOUNDARY t ʊ WORD_BOUNDARY iː ð ə ɹ WORD_BOUNDARY s t ɑ p WORD_BOUNDARY ð ɪ WORD_BOUNDARY ɑ ŋ k l eɪ v z WORD_BOUNDARY m ɪ ʃ ə n WORD_BOUNDARY t ə WORD_BOUNDARY k ɪ l WORD_BOUNDARY ɔ l WORD_BOUNDARY m j uː t ə n t WORD_BOUNDARY p iː p ə l WORD_BOUNDARY ɔ ɹ WORD_BOUNDARY h ɛ l p WORD_BOUNDARY ð ɛ m WORD_BOUNDARY