Combat sentry proto MK IV holotape

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Combat sentry proto MK IV holotape is a holodisk in Fallout 4.


It can be found on a terminal in the main building of the Robotics Disposal Ground. The holotape contains the remote control program for a prototype sentry bot. If the holotape is used on the Pip-boy when the player is in proximity to the sentry bot it will work, but too far away or on any terminal other than the one at the Robotics Disposal Ground, it will show an error and not do anything. Using the holotape's application on-site can send the Sentry Bot to a variety of military installations to kill any and all hostiles in the area.


Off-site usageEdit


----ERROR CODE 992GF7----
Link cannot be established with sentry. If wired, check for proper connection. If non-wired, terminal must have clear site to currently connected sentry.

Commissioned by <REDACTED> and built by <REDACTED>, this prototype sentry must only be operated by offical personal of <REDCATED> or the associated client.

On-site usageEdit

Activate Sentry BotEdit

Deactivate Sentry BotEdit

Engage Defense ProtocolEdit


Defend USAF Olivia

Defend South Boston Checkpoint

Defend Revere Satellite Array

Defend Fort HaganIn-game spelling, punctuation and/or grammarIcon sic

Initiate Self DestructEdit



This holotape should accompany a Combat Sentry Prototype MKIV.

<REDACTED> is not responsible for any property damage, personal injury, or loss of life sustained while operating this Prototype.

If you are not a member of <REDACTED> or an associate of this prototype's owner, <REDACTED>, you must destroy this holotape IMMEDIATELY and deny any existence of it or the accompanying Prototype.


  • The perk Robotics Expert can be used to interact with the sentry bot once this holotape is used to activate it, with the exception to activation and deactivation.

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