ARC

ARC is the most common enemy Raiders face when Topside. They are deadly machines that rain from the sky to ravage the surface of the Rust Belt.

They range from small, unassuming forms like roaming Surveyors and feisty Ticks to towering, multi-legged behemoths that dominate the landscape. Each ARC variant has its own strengths, weaknesses, and attack patterns, requiring different strategies to defeat.

Variants

ARC	Notable drops	XP gained	Tips
Snitch	ARC Synthetic Resin ARC Thermo Lining Sensors Snitch Scanner	Destroy: 100 Loot: 200	Easily destabilized with destroyed thrusters. Loudly alerts nearby ARC to Raider presence. Destroy Quickly to avoid it summoning ARC Reinforcements
Wasp	Light Ammo Simple Gun Parts ARC Synthetic Resin Wasp Driver	Destroy: 100 Loot: 200	Easily destabilized with destroyed thrusters.
Hornet	Medium Ammo Simple Gun Parts ARC Performance Steel Hornet Driver	Destroy: 150 Loot: 250	Unarmored rear thrusters. Easily destabilized with destroyed thrusters. Dodge Roll when it sounds its attack
Tick	ARC Flex Rubber ARC Thermo Lining Tick Pod	Destroy: 50 Loot: 100	Often heard before seen. Easily destroyed with any weapon. Dodge Roll as soon as it latches on.
Pop	ARC Coolant ARC Thermo Lining Crude Explosives Pop Trigger	Destroy: 50 Loot: 100	Climb to avoid if ambushed. Easily destroyed with any weapon. Dodge roll over it to bait its explosion (takes a few tries to get it right)
Fireball	Crude Explosives ARC Coolant ARC Thermo Lining Fireball Burner	Destroy: 100 Loot: 200	Climb to avoid if ambushed. Weak point is exposed when it opens to attack. Run or Dodge Roll away after destroying it to avoid fire. 1 heavy ammo round or shoot it when it exposes its white core
Turret	Light Ammo Simple Gun Parts ARC Synthetic Resin ARC Thermo Lining	Destroy: 100 Loot: 200	Bait its attack and hide behind cover. Use heavy ammo (usually 2 shots)
Sentinel	Heavy Ammo Advanced ARC Powercell ARC Coolant Medium Gun Parts Sentinel Firing Core	Destroy: 200 Loot: 300	Bait its attack and hide behind cover. Shooting Yellow Canister on its arm
Surveyor	Advanced ARC Powercell ARC Circuitry Sensors Surveyor Vault	Destroy: 200 Loot: 300 for core + 100 per part	Weak point is exposed when shooting laser. Flees at high speed. Stun using Hornet Drivers, Showstoppers, etc. Explosives recommended.
Shredder	Mechanical Components Simple Gun Parts ARC Synthetic Resin Shredder Gyro	Destroy: 200 Loot: 250	Weak point is thrusters. Never engage without adequate cover. Hide behind cover when it signals its attack. Only found on Stella Montis Heavy Ammo or Grenades recommended. Hullcracker
Comet	Crude Explosives ARC Coolant ARC Thermo Lining Comet Igniter	Destroy: 100 Loot: 200	Climb to avoid if ambushed. Heavy Ammo or Grenades recommended.
Firefly	ARC Performance Steel Simple Gun Parts ARC Coolant ARC Thermo Lining Firefly Burner	Destroy: 150 Loot: 250	Semi-armored thrusters. Shooting Yellow Canister on its body Easily destabilized with destroyed thrusters.
Spotter	ARC Synthetic Resin ARC Thermo Lining Sensors Spotter Relay	Destroy: 100 Loot: 200	Quickly destroy them before target lock. Find vertical cover to avoid Bombardier attacks.
Bombardier	Launcher Ammo ARC Performance Steel Heavy Gun Parts Bombardier Cell	Destroy: 500 Loot: 300 per part	Weak points are the yellow leg joints and rear canister. Heavy ammo and the Hullcracker are most effective Destroy Spotter to reduce its vision Avoid close-range shockwave attack. Deadline on its rear Wolfpack Grenade Find cover above you and in front of you while you shoot at its leg joints.
Bastion	Medium Ammo ARC Circuitry ARC Performance Steel Heavy Gun Parts Bombardier Cell	Destroy: 500 Loot: 250 per part	Weak points are yellow leg joints and rear canister. Slow, but can turn its gun quickly. Deadline on its rear or on top of its head Wolfpack Grenade Helpless when stunned using Hornet Drivers, Showstoppers, etc. Same cover technique as Bombardier
Leaper	ARC Alloy Advanced ARC Powercell Mechanical Components Leaper Pulse Unit	Destroy: 500 Loot: 600 for core + 500 per part	Weak points are leg joints and Eye Ball. Explosives make quick work of destroying it. Wolfpack Grenade Helpless when stunned using Hornet Drivers, Showstoppers, etc.
Rocketeer	ARC Alloy Advanced ARC Powercell Rocketeer Driver Heavy Ammo	Destroy: 500 Loot: 500 per part	Weak points are thrusters and above scanner. Silver Canister on its back 2 Wolfpack Grenades
Queen	ARC Circuitry Advanced ARC Powercell Complex Gun Parts Magnetic Accelerator Queen Reactor	Destroy: 1000 Loot: 1000 for core + 500 per part	Shoot off the armor plates, then aim for the Red Glowing Core Yellow Weakpoints on its Legs Deadline its head or when core is exposed
Matriarch	ARC Circuitry Advanced ARC Powercell Complex Gun Parts Magnetic Accelerator Matriarch Reactor	Destroy: 1000 Loot: 1000 for core + 500 per part	Shoot off the armor plates, then aim for the Red Glowing Core Yellow Weakpoints on the Legs Deadline its head or when core is exposed

Husks and Probes

Husks — the remnants of old ARC machines from past battles — are scattered all over Topside just waiting to be looted.

Over the duration of your time Topside, ARC Probes will land to collect data and then leave when they're finished. They can be breached using the Raider Tool and looted, but beware — they will signal to nearby ARC for help. Occasionally, damaged Probes can be found knocked over and unable to launch again.

ARC	Notable drops	XP gained
Wasp Husk	ARC Alloy Wasp Driver Light Ammo	400
ARC Probe	ARC Alloy ARC Circuitry ARC Motion Core ARC Powercell	700
ARC Courier	ARC Circuitry Hornet Driver Surveyor Vault Sentinel Firing Core ARC Motion Core	700
Rocketeer Husk	ARC Alloy Rocketeer Driver Heavy Ammo Damaged Rocketeer Driver	700
Baron Husk	ARC Coolant ARC Flex Rubber ARC Performance Steel	500
Deforester Husk	ARC Flex Rubber ARC Coolant ARC Synthetic Resin Advanced Mechanical Components	0

Behavior

Every ARC machine has three "modes" that dictate its intentions. Raiders can easily identify which active mode a machine is in by understanding the differences between the colors of light emitted by its scanner: blue, yellow, and red.

• Blue: Indicates the machine is in an unelevated patrol mode passively searching for Raider targets or activity. It continues its patrol of an area until it finds a disturbance.

• Yellow: Indicates it's in an alerted state after witnessing possible Raider activity. In this state, ARC will investigate the location of the disturbance and then lower its alert level if no Raider activity is found.

• Red: Indicates the ARC machine has found a target and entered combat mode. ARC in this state will attack until it loses its target.

Note: If attacked when on patrol, ARC can bypass their elevated state and immediately enter combat mode if an investigation isn't required to find a target. The color of the scanner will shift between red and yellow as Raiders enter and exit scanner range.

Armor

ARC have different types of armor that can tell you at a glance where their weak-points are. A general rule of thumb for dealing with ARC is that weapons with higher ARC Armor Penetration will be more effective.

• Unarmored Plating is distinguished by its matte, white coloring. All weapons are semi-effective against Unarmored Plating although rounds with Moderate ARC Armor Penetration or above will be the most effective.
• Armored Plating is distinguished by its shiny, dark gray coloring. Rounds with or above Moderate ARC Armor Penetration are needed to damage Armored Plating as anything below Moderate will bounce off. Damaging Armored Plating can strip it off, revealing weaker plating.
• Weak-Points are distinguished by their matte, bright yellow coloring. Damaging Weak-Points deals direct damage to ARC and should be the priority when attacking.