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Sentry bot (Fallout 3)

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This page is about sentry bots as they appear in Fallout 3. For other sentry bots that appear throughout the Fallout series, see sentry bot.
Sentry bot
Sentry bot.png
Gatling laser sentry bot
LocationCapital Wasteland
Anchorage Reclamation simulation
AffiliationUnited States Armed Forces
Private Security
VariantsSentry bot
Enclave sentry bot (Broken SteelGametitle-FO3 BS.png)
Strike team sentry bot Operation: AnchorageGametitle-FO3 OA.png
U.S. Army sentry bot
Presidential metro sentinal unit
 
Gametitle-FO3.pngGametitle-FO3 OA.pngGametitle-FO3 BS.png
Gametitle-FO3.pngGametitle-FO3 OA.pngGametitle-FO3 BS.png

Sentry bots are a model of robot found in the Capital Wasteland after 2277.

Background

The following section is transcluded from Sentry bot. To modify, please edit the source page.

The heaviest class of combat robot in the United States military, the sentry bot sacrifices speed and maneuverability for sheer resilience and overwhelming firepower. While the Assaultron is designed for melee combat and the Mister Gutsy is a jack-of-all-trades, the sentry bot's purpose is to engage the enemy at range with a variety of weapons, including miniguns, Gatling lasers, rocket launchers, and even back-mounted cluster grenade launchers, while its thick armor and multiple redundant systems allow it to survive extended engagements. It's commonly considered to be one of the most dangerous robots ever created and RobCo Industries' finest fighting robot. Late models are also provided with the ability to self-destruct to prevent enemy from recovering the robot.[1] Early sentry bot models were issued serial numbers in the SB-#### format (model, then serial), with later models transitioning to the standardized alphanumeric registration in the ABC-###### format.[2]

An early sentry bot model developed by RobCo Industries, designed specifically for heavy combat. The bot is divided into two halves, with the upper body containing the central processing unit, power core, and mounting the primary optical receptor. They are protected by a cast armored shell, consisting of just three pieces: The torso and upper assembly, a separate rear plate giving access to internal mechanics, and the head assembly protecting the main optical receptor. Its arms act as hardpoints, accepting a variety of weapons including miniguns, Gatling lasers, and rocket launchers. The lower body, connected by four shock absorbers and a centrally-mounted duct, contains fans venting accumulated hot air outside the chassis, preventing overheating. For movement, the lower body is fitted with three independent legs that provide it with a stable firing platform in any environment, much like a machine gun mount. The legs terminate in semi-spherical wheels (rubberized on the front, solid steel scoops on the back), giving it excellent mobility as well.[3][4] Unlike the Gutsy or Assaultron, all sentry bots come with a simple synthetic personality.[5]

Characteristics

All sentry bots encountered in the game have either a minigun or Gatling laser on the right pylon and a missile launcher on the left one. As expected, they are the most resilient robot in the game, with as many hit points as a deathclaw and far greater damage resistance to boot. Furthermore, they cannot be crippled with a dart gun nor do they have any critical weak spots: Their head and legs take -50% and -25% damage respectively from all normal attacks. Its one flaw is the combat inhibitor mounted on the back and its slow turn rate, allowing the player to circle-strafe and destroy the inhibitor, causing it to frenzy (though it's pointless in areas without additional enemies). pulse grenades are very effective weapons against the bot. Using the Robotic Expert is also a good way to permanently shut it down (the talk option is useless).

Sentry bots sit at the top of the game's robotic food chain and are routinely found roaming the Capital Wasteland, either alone or in groups of two to three. The Outcasts and the Enclave use them on a regular basis, with a pair of unique sentry bots found at Raven Rock, guarding the entrance to the President's chambers. They will kill the Enclave soldiers standing at their post, allowing the player to reach Eden.

One sentry bot is posted alongside Paladin Bael at the entrance to the Citadel. It respawns, providing an endless supply of loot, but will be removed from the game after completing Take It Back!. A quest-related sentry bot is found in Big Town and can be repaired to aid the town in defending against super mutants following Big Trouble in Big Town. Another two can spawn alongside the Mechanist at Canterbury Commons.

Variants

Sentry bot

Sentry bot.png

Sentry bots come in many different guises, distinguishable by their paint, which shows their affiliation (Enclave, Brotherhood Outcasts, United States Armed Forces, etc.).

Name (Base ID)StatisticsBehaviorAbilitiesItems
Sentry bot
0001cf8a
LevelIcon level.png
12
Experience pointsIcon XP.png
120
DetectionIcon eye.png
7
Health pointsIcon heart.png
500
Damage resistanceIcon shield silver.png
0%
FistIcon fist.png
Very aggressive: Will attack enemies and neutrals on sight.Icon required.pngIcon required.pngIcon optional.png
ConfidenceIcon confidence.png
Foolhardy: Will never flee or avoid anyone.Icon required.pngIcon required.pngIcon required.pngIcon required.png
GroupIcon group.png
Helps friends: Will help friends and allies.Icon required.pngIcon required.png
AttackIcon attack.png
Melee (22 DamageIcon damage.png)
AttackIcon attack.png
Missile launcher (20 DamageIcon damage.png)
AttackIcon attack.png
Gatling laser (6 DamageIcon damage.png)
AbilityIcon ability.png
RadiationIcon radiation.png Radiation resist. 100%
AbilityIcon ability.png
PoisonIcon poison.png Poison resist. 100%

Enclave sentry bot

Fo3BS Enclave sentry bot.png

Slightly darker in appearance when compared to the normal variant, the Enclave model boasts improved systems.

Name (Base ID)StatisticsBehaviorAbilitiesItems
Enclave sentry bot
0001cf75
0005f9d1
000aec21
000aec22
000af5e4
000af5e5
LevelIcon level.png
12
Experience pointsIcon XP.png
120
DetectionIcon eye.png
7
Health pointsIcon heart.png
500
Damage resistanceIcon shield silver.png
0%
FistIcon fist.png
Very aggressive: Will attack enemies and neutrals on sight.Icon required.pngIcon required.pngIcon optional.png
ConfidenceIcon confidence.png
Foolhardy: Will never flee or avoid anyone.Icon required.pngIcon required.pngIcon required.pngIcon required.png
GroupIcon group.png
Helps friends: Will help friends and allies.Icon required.pngIcon required.png
AttackIcon attack.png
Melee (20 DamageIcon damage.png)
AttackIcon attack.png
Missile launcher (20 DamageIcon damage.png)
AttackIcon attack.png
Minigun (9 DamageIcon damage.png)
AbilityIcon ability.png
RadiationIcon radiation.png Radiation resist. 100%
AbilityIcon ability.png
PoisonIcon poison.png Poison resist. 100%
Enclave sentry bot Broken SteelGametitle-FO3 BS.png
xx007ff0
xx007ff1
LevelIcon level.png
12
Experience pointsIcon XP.png
120
DetectionIcon eye.png
7
Health pointsIcon heart.png
500
Damage resistanceIcon shield silver.png
0%
FistIcon fist.png
Very aggressive: Will attack enemies and neutrals on sight.Icon required.pngIcon required.pngIcon optional.png
ConfidenceIcon confidence.png
Foolhardy: Will never flee or avoid anyone.Icon required.pngIcon required.pngIcon required.pngIcon required.png
GroupIcon group.png
Helps friends: Will help friends and allies.Icon required.pngIcon required.png
AttackIcon attack.png
Melee (20 DamageIcon damage.png)
AttackIcon attack.png
Missile launcher (20 DamageIcon damage.png)
AttackIcon attack.png
Gatling laser (6 DamageIcon damage.png)
AbilityIcon ability.png
RadiationIcon radiation.png Radiation resist. 100%
AbilityIcon ability.png
PoisonIcon poison.png Poison resist. 100%

Strike Team sentry bot

Fo3OA Winterized sentry bot.png

The most expensive option for recruitment in Operation Anchorage is a winterized sentry bot, with a built-in minigun and missile launcher, costing 4 recruitment markers.

Name (Base ID)StatisticsBehaviorAbilitiesItems
Strike Team sentry bot
xx005013 Operation: AnchorageGametitle-FO3 OA.png
LevelIcon level.png
3
Experience pointsIcon XP.png
30
DetectionIcon eye.png
7
Health pointsIcon heart.png
300
Damage resistanceIcon shield silver.png
0%
FistIcon fist.png
Aggressive: Will attack enemies on sight.Icon required.pngIcon optional.pngIcon optional.png
ConfidenceIcon confidence.png
Foolhardy: Will never flee or avoid anyone.Icon required.pngIcon required.pngIcon required.pngIcon required.png
GroupIcon group.png
Helps friends: Will help friends and allies.Icon required.pngIcon required.png
AttackIcon attack.png
Melee (20 DamageIcon damage.png)
AttackIcon attack.png
Missile launcher (20 DamageIcon damage.png)
AttackIcon attack.png
Minigun (9 DamageIcon damage.png)
AbilityIcon ability.png
RadiationIcon radiation.png Radiation resist. 100%
AbilityIcon ability.png
PoisonIcon poison.png Poison resist. 100%

U.S. Army sentry bot

Military sentry bot.png

U.S. Army sentry bots can be found wandering about the wastes in seemingly random locations, even miles away from the nearest military installation. They can easily be recognized by their green paint job and U.S. Army insignia painted on their chassis and arms.

Name (Base ID)StatisticsBehaviorAbilitiesItems
Sentry bot
xx005c6e
LevelIcon level.png
12
Experience pointsIcon XP.png
120
DetectionIcon eye.png
7
Health pointsIcon heart.png
500
Damage resistanceIcon shield silver.png
0%
FistIcon fist.png
Very aggressive: Will attack enemies and neutrals on sight.Icon required.pngIcon required.pngIcon optional.png
ConfidenceIcon confidence.png
Foolhardy: Will never flee or avoid anyone.Icon required.pngIcon required.pngIcon required.pngIcon required.png
GroupIcon group.png
Helps friends: Will help friends and allies.Icon required.pngIcon required.png
AttackIcon attack.png
Melee (22 DamageIcon damage.png)
AttackIcon attack.png
Missile launcher (20 DamageIcon damage.png)
AttackIcon attack.png
Gatling laser (6 DamageIcon damage.png)
AbilityIcon ability.png
RadiationIcon radiation.png Radiation resist. 100%
AbilityIcon ability.png
PoisonIcon poison.png Poison resist. 100%
Sentry bot
xx005c6f
LevelIcon level.png
12
Experience pointsIcon XP.png
120
DetectionIcon eye.png
7
Health pointsIcon heart.png
500
Damage resistanceIcon shield silver.png
0%
FistIcon fist.png
Very aggressive: Will attack enemies and neutrals on sight.Icon required.pngIcon required.pngIcon optional.png
ConfidenceIcon confidence.png
Foolhardy: Will never flee or avoid anyone.Icon required.pngIcon required.pngIcon required.pngIcon required.png
GroupIcon group.png
Helps friends: Will help friends and allies.Icon required.pngIcon required.png
AttackIcon attack.png
Melee (22 DamageIcon damage.png)
AttackIcon attack.png
Missile launcher (20 DamageIcon damage.png)
AttackIcon attack.png
Minigun (9 DamageIcon damage.png)
AbilityIcon ability.png
RadiationIcon radiation.png Radiation resist. 100%
AbilityIcon ability.png
PoisonIcon poison.png Poison resist. 100%

Presidential metro sentinal unit

Sentry bot.png

This unique sentry bot is encountered in Broken Steel, at the end of the Presidential metro, near the metro to Adams Air Force Base. It holds the main fuse, which needs to be used to repair the nearby powerbox for the metro.

Name (Base ID)StatisticsBehaviorAbilitiesItems
Presidential metro sentinal unit
xx0064d6 Broken SteelGametitle-FO3 BS.png
LevelIcon level.png
12
Experience pointsIcon XP.png
120
DetectionIcon eye.png
7
Health pointsIcon heart.png
500
Damage resistanceIcon shield silver.png
0%
FistIcon fist.png
Very aggressive: Will attack enemies and neutrals on sight.Icon required.pngIcon required.pngIcon optional.png
ConfidenceIcon confidence.png
Foolhardy: Will never flee or avoid anyone.Icon required.pngIcon required.pngIcon required.pngIcon required.png
GroupIcon group.png
Helps friends: Will help friends and allies.Icon required.pngIcon required.png
AttackIcon attack.png
Melee (22 DamageIcon damage.png)
AttackIcon attack.png
Missile launcher (20 DamageIcon damage.png)
AttackIcon attack.png
Gatling laser (6 DamageIcon damage.png)
AbilityIcon ability.png
RadiationIcon radiation.png Radiation resist. 100%
AbilityIcon ability.png
PoisonIcon poison.png Poison resist. 100%

Notable quotes

Sentry bots possess an authoritative array of speech programming, mainly expressing its current programming out loud, much like the protectron. However, sentry bots have a "deeper" voice, instilling fear in all.

  • "Alert. Non-combatants are advised to leave the area. Security sweep in progress. Lethal force may be used without warning."
  • "No hostiles detected. Continuing perimeter sweep."
  • "Threat level: red."
  • "Do not interfere with security operations."
  • "Security lockdown in effect. Hostile target acquired!"
  • "Adding target to threat matrix!"
  • "Hostile detected. Commencing neutralisation."
  • "Warning: use of lethal force is authorized!"
  • "Alert! Non combattants are advised to leave the area. Security sweep in progress. Lethal force may be used without warning."
  • "Alert. Hostile detected. Lethal force authorized for all units."
  • "Do not interfere with security protocols."
  • "Have a nice day."

Behind the scenes

  • Both the Enclave and Lyons' Brotherhood of Steel were supposed to have bots with unique textures. They are not used in the game, with both using the base steel sentry bot.

Bugs

  • PlayStation 3Icon ps3.png Xbox 360Icon xbox360.png PCIcon pc.png Outcast sentry bots will always spawn with the Gatling laser arm, despite resources for the minigun variants being present.
  • Xbox 360Icon xbox360.png PlayStation 3Icon ps3.png A disabled sentry bot may be stuck in an animation loop if the animation did not finish when it was disabled.

Gallery

References

  1. Fallout 4 loading screen hints: "The Sentry Bot is one of the most dangerous combat drones ever created, and utilizes a variety of heavy weapons systems to destroy its enemies. Upon death, it erupts in a devastating explosion."
  2. Serial numbers in Fallout 3 and Fallout: New Vegas.
  3. REPCONN headquarters placard: ""Watch Your Step!""
    "Whoa, watch your step! You don't want to be facing this fearsome fellow if you accidentally stumble into a restricted area. Whether sporting the latest in duel miniguns, rockets, or laser cannons, the Sentrybot not only takes it job seriously, it also takes no prisoners! It's proof of RobCo's commitment to defense that these deadly guards are concealed in chambers throughout this facility, so let this be a warning: Watch where you step, or out'll come RobCo, guns blazing!"

    "Exhibit Brought to You By Your Friends at RobCo."
  4. Tour guide: "Now for the highlight of our tour! Due to a generous donation from RobCo, this next exhibit showcases the wondrous world of - robots! Around you are the incredible Eyebot, the fearsome Sentry Bot, and the always-helpful Mr. Handy. That helpfulness runs through our whole line! This is the final stop on our tour. This model of our solar system is a small example of where the partnership between RobCo and REPCONN hopes to go. See those little rockets zipping about? They are manned by robots, tirelessly looking for resources to mine on planets beyond our own. And that's it for our tour today, Rocketeers - RobCo and its tiny partner REPCONN thank you! Any further questions, please, feel free to ask."
    (Tour guide's dialogue)
  5. Artificial personality in Fallout 3 and Fallout: New Vegas.