Sentry Bot (Fallout 3)

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

Characteristics
Sentry bots have two arms equipped with powerful weapons: a minigun or Gatling laser on their right hand, and a missile launcher on their left hand. All models have wheeled and tripod legs.

They are programmed to behave in an authoritative, professional, military manner, in contrast to the "gung-ho" personality of the Mister Gutsy.

Gameplay attributes
Sentry bots are extremely durable, possessing as much health as a deathclaw and greater damage resistance. However, they do not have a weak point that can be targeted for additional damage. In fact, their heads are more durable than their torsos, though targeting the head yields a greater chance of a critical hit. Like other robots, sentry bots are equipped with a combat inhibitor and will frenzy if it is disabled. Exploiting this weakness can be helpful in dispatching other enemies, since sentry bots are among the most powerful foes in the game. Although the sentry bot is quite fast, it has a slow turning rate, which can be used to the player character's advantage.

Sentry bots are the highest-level robot non-player characters in Fallout 3, and are more formidable opponents than protectrons, robobrains, and Mister Gutsy models.

Sentry bots are among the toughest enemies in the game and present a serious threat to any low level player unlucky enough to encounter one. It is not uncommon to find sentry bots roaming the Capital wastes in packs of two or three. these robots are mobile fortresses; their high level of health and lethality makes them the preeminent fighting machines of the Capital wastes.

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

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.
 * "Warning. Non-combatants 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."

Bugs

 * Outcast sentry bots will always spawn with the Gatling laser arm, despite resources for the minigun variants being present.
 * If you disable the sentry bot, the sentry bot will be disabled but will keep on performing the animation where he is disabled.

Gallery
Робот-Охранник Wachbot Robot strażniczy RNK Sentry Bot (辐射3) Robot centinela (Fallout 3) Robot Sentinella