Protectron (Fallout 3)

Protectron is a pre-war robot type, shaped per the classic Robbie the Robot model. Their primary function seems to be protection, their secondary programming is very modular and they can do many things from being greeters, to ticket-takers, to even functioning as celebrity/historical figure impersonators. They were created by the RobCo corporation.

Removal of the combat inhibitor on a Protectron's back (say, shooting it off) will cause the robot to frenzy, attacking friend and foe alike.

Appearances
Protectron robots appear only in Fallout 3.

Known Protectron robots
Deputy Weld

Shakes

Button Gwinnett

Ticket Bot