Icon info
This is an overview article which contains background information and cross-game comparisons. For game-specific information and stats, see the articles linked on the right.
Gameplay articles
Fallout 2Sentry bot
Fallout 3Sentry bot
Enclave sentry bot
U.S. Army sentry bot
Outcast sentry bot
Strike team sentry bot Gametitle-FO3 OA
Presidential metro sentinal unitGametitle-FO3 BS
Fallout: New VegasSentry bot
Hardened sentry bot
Prototype sentry bot
Sentry bot mark series Gametitle-FNV OWB
RY-589 Ultimo bot Gametitle-FNV OWB
Icon cut NCR sentry bot
Fallout 4Sentry bot
Siege breaker sentry bot
Gunner sentry bot
Gunner siege breaker sentry bot
Annihilator sentry bot
Gunner annihilator sentry bot
Annihilator sentry bot Mk II
Gunner annihilator sentry bot Mk II
Combat sentry prototype MkIV
Sentry bot ripper Gametitle-FO4 AUT
Sentry bot lament Gametitle-FO4 AUT
Sentry bot carnage Gametitle-FO4 AUT
Sentry bot butcher Gametitle-FO4 AUT
Sentry bot reaper Gametitle-FO4 AUT
Space sentry Gametitle-FO4 NW
Space sentry breaker Gametitle-FO4 NW
Space sentry annihilator Gametitle-FO4 NW
Space sentry obliterator Gametitle-FO4 NW
Fallout 76Sentry bot
Sentry bot siegebreaker
Annihilator sentry bot
Annihilator sentry bot Mk. II
Whitespring sentry bot
Enclave sentry bot
Hornwright security robot
Sentry bot strikebreaker
Arktos Pharma sentry bot Gametitle-FO76 WA
Whitespring elite security force Gametitle-FO76 NW
Gametitle-FO2Gametitle-FO3Gametitle-FO3 OAGametitle-FO3 BSGametitle-FNVGametitle-FNV OWB
Gametitle-FO2Gametitle-FO3Gametitle-FO3 OAGametitle-FO3 BSGametitle-FNVGametitle-FNV OWBGametitle-FO4Gametitle-FO4 AUTGametitle-FO76

Sentry bot is a robot that appears in Fallout 2, Fallout 3, Fallout: New Vegas, Fallout 4 and Fallout 76.


Sentry bots (military serial numbers SB-XXXX) are security robots made before the Great War with the express purpose of participating in the heaviest of firefights during war. Where the Mister Gutsy is a hovering platform with modest armor plating, and the protectron was originally designed for protecting business premises, the sentry bot is a powerhouse, equipped with sturdy armor plating, powerful weapons integrated into its chassis and high mobility, thanks to mecanum wheels mounted on its three legs.


Sentry botEdit


Fallout 2 variant

Sentry bots are one of the highest level robot characters, and are much more powerful opponents than protectrons, robobrains and Mister Gutsy models. Their purpose is mainly to guard locations for high profile characters and organizations, such as REPCONN in Fallout: New Vegas. In Fallout 3 they will be more encountered in office buildings and pose a serious threat, wielding missile launchers and Gatling lasers. Three standard variants exist. The Fallout 2 variant is shaped like a bipedal mech, standing about the height of a super mutant and is capable of walking. The Fallout 4 variant is much bulkier, can accommodate dual mortars, and has a cooldown mode that is activated if the robot fights for too long.

Enclave sentry botEdit

Fo3BS Enclave sentry bot
Gameplay article: Fallout 3

Slightly darker in appearance when compared to the normal variant, the Enclave model boasts improved systems. They appear at Raven Rock and alongside Enclave squads in the wasteland. During Broken Steel they are encountered guarding Adams Air Force Base.

U.S. Army sentry botEdit

Military sentry bot
Gameplay article: Fallout 3

Military robots from before the Great War, painted in the characteristic olive green of the U.S. Army. They can be encountered at Fort Constantine, the National Guard depot and when wandering around the wasteland.

Strike team sentry botEdit

Fo3OA Winterized sentry bot
Gameplay article: Operation: Anchorage

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.

Presidential metro sentinal unitEdit

Sentry bot
Gameplay article: Broken Steel

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 is needed to repair the nearby powerbox for the metro.

Hardened sentry botEdit

Sentry bot
Gameplay article: Fallout: New Vegas

A hardened sentry bot is a hardened version of the military sentry bot. They are Enclave affiliated, encountered along with hardened Mister Gutsies around the crashed vertibird in the Mojave Wasteland.

Prototype sentry botEdit

Gameplay article: Fallout: New Vegas

An antique prototype version that can be found in the museum inside REPCONN headquarters. It has four wheels instead of the standard three, a set of arms stemming from its back and arching around over its shoulders. Where the arms would normally join the main body in current models, it includes 3 jets on each side, as used by Mister Gutsy/Handy robots.

Mark seriesEdit

Sentry bot
Gameplay article: Old World Blues

The sentry bot mark series appears only in the Fallout: New Vegas add-on Old World Blues.

NCR sentry botEdit

Icon cut contentThe following is based on Fallout: New Vegas cut content and has not been confirmed by canon sources.
Military sentry bot
Gameplay article: Fallout: New Vegas

It is similar to the military sentry bot in appearance, but is differently colored, with orange eyes instead of the standard red. The NCR sentry bot was originally intended to be stationed in Camp McCarran, evident in its G.E.C.K. id McCarranFieldSentryBot, but was cut from the final version of Fallout: New Vegas.

Icon cut contentEnd of information based on Fallout: New Vegas cut content.

Siege breaker sentry botEdit

Gameplay article: Fallout 4

A siege breaker sentry bot is a slightly upgraded version of the normal sentry bot, only appearing in Fallout 4. They can be dangerous opponents for lower level players.

Notable sentry botsEdit

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