Sentry Bot

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Sentry Bot

Warehouse.png Wheeled bot1 l.png

Sentry Bot model.png

Role Automated defense
Location South Gate Station
GMS compound level 2
Water Treatment Facility
Elwood's House
Lower Depot A west
Lower Underrail
Loot Ammo
Metal Scraps
Electronic Scraps
Flashbangs (rarely)
Electroshock Generators (rarely)
Registration Plate (oddity)
Abilities Throws Flashbangs
Built-in Taser
Can detect and disarm mines
Combat Stats
Combat Stats Level: 5
Damage: 13-20
Range: 10
Action Points: 50
Initiative: 14
Detection: 53
Base Abilities Strength: 7
Dexterity: 4
Agility: 5
Constitution: 6
Perception: 7
Will: 5
Intelligence: 4
Resistances Mechanical: 40% / 12
Heat: 75% / 22
Cold: 90% / 100
Electricity: 0% / 0
Acid: 25% / 15
Energy: 0% / 0
Bio: 100%

Sentry Bot is the most basic security robot model seen in Underrail.


Sentry bots, also known as wheeled bots, are autonomous defense robots that patrol an area, respond to threats reported by security cameras and can roam around before returning to their patrol route. They will attack any perceived threats within their range. They are commonly found in abandoned Biocorp facilities. South Gate Station, probably owing to it's former status as a Biocrp military installation, has several sentry bots as part of it's security force.



They are nasty combat encounters, usually patrolling in groups and they have nasty tricks such as melee-range stuns and flashbangs at their disposal, in addition to their guns. Even a single sentry bot can prove to be fatal, especially at lower levels.

  • Since they have rather high damage threshold, weapons that deal large amounts of damage at once (e.g. high-caliber guns or sledgehammers) work best for destroying them.
  • JHP ammunition and weapons that incur extra resistance on target should be avoided.


Sometimes sentry bots prove to be too much to be taken on in direct combat as a low-level character with poor equipment. They can be avoided either by stealthing past them or finding alternative routes such as ventilation shafts or lockpicking locked doors.

If all that fails, it is possible to lure them into a specific location by causing camera alarms and flanking the bots while they move in to investigate.

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