Protectron Protectrons are a model of robot which appears in " Fallout 3 " , " " , and " Fallout 4 " . Background . < section begin = " Background " / > Created by RobCo , protectron robots were designed ( as their name suggests ) for protection , although they can also be seen being used in a manual labor role as well . Typically used in office - type settings , their secondary programming is modular , making them useful as greeters , ticket collectors , bartenders , celebrity or historical figure impersonators , even sexual partners . Typically used in office settings , a large variety of available synthetic personalities and programming options made them universally useful . RobCo offered personalities like the R04 V9 " office helper " with the ability to process and track office protocols and agendas in real time , RobCo RS3 V4 . 1 . 6 " utility helper " with automatic routine download and pest extermination mode , RobCo RX2 V1 . 16 . 4 " vault helper " , loaded with Vault protocols . Other models of public service protectrons include medics which are outfitted with a defibrillator , firemen using an internal cryo gun , police officers with electric shock and melee capabilities , and even heavy - duty construction workers utilizing internal nail guns . In terms of combat , protectrons are usually weak and easy to defeat , because of their weak weapons and slow movement speed . In the Commonwealth , protectrons are usually found in charging pods attached to terminals that must sometimes be hacked to activate them . The terminal software allows for different " personalities " to be uploaded to the unit , which changes the unit ' s voice dialogue and weapons loadout . The choices are : Default , Subway Steward , Construction Worker , Medical Responder , Firefighter , and Law Enforcement . Some attributes of the protectron ' s looks were derived from 1950 ' s comic books , which keeps with Fallout ' s overall theme . < section end = " Background " / > Variants . Protectron . In " Fallout 3 " , " " and " Fallout 4 " , protectrons are the second - weakest robot variant encountered , with only eyebot s having less firepower . They do not pose much of a threat due to their weaker weaponry and slow speed . They are equipped with dual hand - lasers as well as a head - laser , so that in the event that one weapon is disabled , the protectron can still function in battle . They are not as common in " Fallout : New Vegas " as they are in " Fallout 3 " ; they are in every metro station in the latter , whereas in " Fallout : New Vegas " , they are mostly found patrolling a few office buildings and the Securitron vault . Factory protectron . Factory protectrons are protectrons designed for use as manual labor inside of factories . Computer entries inside Sunset Sarsaparilla Headquarters in " Fallout : New Vegas " mention robots being shipped to the factory to replace the human workers . This is probably the case in " Fallout 3 " as well , and a few examples of these protectrons can be found inside The Mill in the " Fallout 3 " expansion " The Pitt " , although they are already deactivated . Metro protectron . Metro protectrons are a model of protectron found in Washington , D . C . ' s metro stations that will ask for a passing person ' s metro ticket when activated , and that metro ticket will be removed from the inventory . If they do not happen to have a ticket , the protectron will attack . Nuka - Cola security . Nuka - Cola security are protectrons found in the Nuka - Cola plant . They have the Nuka - Cola Corporation logo on them as well as red coloring around their head and hands . A deactivated one is found in " " , in the Lucky 38 penthouse . Outcast protectron . Outcast protectrons are protectrons reprogrammed by the Brotherhood Outcasts . They are found patrolling with Outcast patrols or outside of their bases . Factory protectron ( " The Pitt " ) . These factory protectrons are found in the Pitt steelyard and were being used as a replacement for human labor within the steel mills . They are heavy duty industrial robots , featuring a reinforced " head " part , a protective cage on the back and distinctive yellow coloring . Shipping worker . Shipping workers are protectons found in the Sunset Sarsaparilla Headquarters . There are only two of them , and they can be found on the bottom floor of the factory with the bottle cap press machine . Sunset Sarsaparilla security . Sunset Sarsaparilla security are a slightly tougher variant of the protectron , of which three are still functioning , and can be found patrolling inside the Sunset Sarsaparilla Headquarters . Their function was to protect the factory , possibly against industrial espionage . Several disabled models can also be found within the factory and scavenged for parts . Protectron Mark series . The protectron Mark series was an attempt by scientists in Big MT to improve on the base model of protectron built by RobCo . These protectrons come in six versions , Marks I - VI . Mark I is on par with the protectrons found in the Sunset Sarsaparilla Headquarters , while the other marks are scaled on increasing durability based on the players level . However , the firepower on each Mark series is the same . Behind the scenes . The protectron ' s design seems to be inspired by , a robot that first appeared in the 1956 sci - fi film " " and appeared in numerous movies , television shows and commercials afterward .