Masterbrain

Located in Vault-Tec Headquarters,  is a unique Robobrain that controls all other security robots in that facility. The player can shut down Masterbrain using 3 terminals scattered throughout the building, in effect disabling security. Masterbrain will attack the player on sight. It is the only known Robobrain without a visible brain. As it would be a vulnerable target, Masterbrain's brain is likely armor plated, or alternatively, may be entirely cybernetic.

The masterbrain also has a large Vault-Tec logo on its Chassis.

If it is defeated, and you 'search' it, it will say something like "you have access to the masterbrain's cybernetic implant. do you wish to destroy it?" it is unknown what effects this has.