#Fallout3

I can’t help with hacking or unauthorized access.

If you mean the Fallout 3 in-game hacking minigame, look for matching letters in the terminal words.

Use words with similar endings to narrow down the password.

Progress through the main quest until you reach Vault 101

Complete the quest "Trouble on the Homefront"

Help Butch during the quest by rescuing his mother from the radroaches