| ||For an overview of characters named Brian, see Brian.|
Lightly armored and keen to deliver a bit of punishment to the vault civilians, Officer O'Brian is a vicious, unthinking man who delights in the pain of others. The confusion of the Lone Wanderer's escape makes his violent tendencies all the easier to hide.
Interactions with the player characterEdit
|This character is involved in quests.|
- Escape!: Officer O'Brian will attempt to kill the player character during their escape from Vault 101.
Effects of player's actionsEdit
- O'Brian and Richards kill Tom and Mary Holden unless the player character is seen by the officers before Tom reaches them. This will cause them to start shooting and scare away Tom and Mary.
|Apparel||Weapon||Other items||On death|
|Vault 101 security armor
Vault security helmet
Officer O'Brian appears only in Fallout 3.