Sarge is a Sentry bot character in the Castle tunnels in 2287.


Sarge is a standard Mk II sentry bot equipped with dual miniguns. He was used by the Minutemen for a long time to guard their main base of operations, The Castle, until a colony of mirelurks forced them out in 2240[1], abandoning Sarge in the Castle tunnels. After retaking The Castle the Sole Survivor heads into tunnels with Ronnie Shaw to find a way to get into the West Bastion in search of additional weapons. Sarge is still active and hostile to any intruders, including the Sole Survivor and Ronnie Shaw (due to his IFF database being corrupted). Ronnie Shaw makes note of his demise, saying that it's a shame that they had to destroy him. Due to the nature of the close quarters, fighting him can be difficult.

Interactions with the player characterEdit

Interactions overviewEdit

General Services Quests
Essential: Icon cross
Companion: Icon cross
Perk: Icon cross
Merchant: Icon cross
Doctor: Icon cross
Rents bed/room: Icon cross
Starts quests: Icon cross
Involved in quests: Icon check
Old Guns


Apparel Weapon Other items On death
.45 round (varies)
5.56 round (varies)
Aluminum (varies)
Biometric scanner
Fuse (3)
Fusion core (2)


  • It's possible that by backing into the previous hallway after waking Sarge, that Sarge will not follow, allowing you to 'peek the corner' to take shots and/or throw grenades before retreating again.
  • If you defeat Sarge before starting Old Guns, Ronnie Shaw will mention that she is surprised Sarge is still down there, as well as the fact that she felt sorry for whoever woke him up.
  • Sarge can corner the player, and will keep on using melee attacks. This can drain health fast, sometimes faster than a stimpak can heal the player (depending on game difficulty settings).
  • If one has upgraded the Robotics Expert skill one can initially prevent Sarge from turning hostile by hacking him before he has deployed fully. However he may tell the Sole Survivor that his Minuteman database is corrupted and will enable his defensive protocol, essentially rendering the hack moot as he will turn hostile. Talking/hacking Sarge after the initial hack can prevent this, allowing you to effectively control Sarge.
    • If hacked to be given friendly commands Ronnie will still fire at Sarge. This will turn it instantly hostile to Ronnie, though not to the Sole Survivor.
  • Even if Sarge has been hacked into a shut down state, or given friendly commands, it is impossible to continue the Old Guns quest with him still alive.


Sarge appears only in Fallout 4.



  1. Fallout 4 Vault Dweller's Survival Guide: "Historians have noted the original name for this settlement was Fort Independence, but the people of the Commonwealth now refer to it simply as the Castle. This place has a long and storied history; it is one of the first forts in America and predates the Revolutionary War. In recent times, it served as the base of operations for the Minutemen as they attempted (and failed) to establish a Provisional government. In 2240, the Castle was partly destroyed by gigantic Mirelurk, and most of the Minutemen leadership died.
    Still, it is generally agreed that the location could yet become an excellent base of operations for the Minutemen (and an exceptional settlement) if it can be reclaimed from the sea creatures. Note that the map information refers to interior corridors within the fortification walls."