Bastion
An armored ground machine with target-switch audio cues and vulnerable leg joints or weak spots.
Open entry
ARC machine field guide
Identify a machine by behavior before choosing the fight. This field guide separates scouts, ambushers, artillery, armored ARC and boss-scale threats.
Official descriptions are condensed into the behavior signal a Raider needs during an encounter.
An armored ground machine with target-switch audio cues and vulnerable leg joints or weak spots.
Open entryA small eight-legged ARC that clings to walls and ceilings before jumping an unaware Raider.
Aerial surveillance ARC that calls reinforcements after spotting suspicious activity.
A large patrol machine defined by a destructive leap attack and sudden gap-closing pressure.
Works with Spotter drones to designate Raiders for lethal mortar attacks.
An enormous machine that defends the Harvester and can punish unprepared groups with stomp pressure.
An imposing machine introduced with Stella Montis and encountered under a specific map condition.
A fast ARC introduced at Stella Montis for dangerous interior and close-range encounters.
A persistent flying flame threat that can chase Raiders into cover instead of holding distance.
A rolling explosive ARC with armor plates, an exposed inner weak point and high burst threat.
A floating ARC introduced with Riven Tides whose loot value was increased in Live Update 1.36.0.
One of the Rust Belt flying ARC types and a recurring Feat target in official game examples.
Use size only as a first clue; detection behavior and attack pattern are often more important.
| Class | Examples | Primary response |
|---|---|---|
| Detection and pursuit | Snitch, Firefly, Wasp | Break line of sight, remove surveillance quickly and avoid letting an alert escalate. |
| Ambush and close pressure | Tick, Leaper, Shredder, Comet | Preserve movement space and learn the cue that precedes the machine's committed attack. |
| Armored and indirect fire | Bastion, Bombardier, Rocketeer | Fight from hard cover, attack vulnerable components and avoid static open trades. |
| Boss-scale ARC | Queen, Matriarch | Treat the encounter as an objective requiring preparation, ammunition depth and an exit plan. |
Enemy names and behavior notes are based on official overview, update and developer-tip pages.