ARC Complex

Doom Eternal missions
Hell on Earth Exultia Cultist Base Doom Hunter Base Super Gore Nest ARC Complex Mars Core Sentinel Prime Taras Nabad Nekravol Nekravol - Part II Urdak Final Sin Fortress of Doom (hub)
The Ancient Gods, Part One
UAC Atlantica Facility The Blood Swamps The Holt ARC Carrier (hub)
The Ancient Gods, Part Two
The World Spear Reclaimed Earth Immora The Dark Lord

The ARC Complex is the sixth level of Doom Eternal. To locate Deag Grav, the final Hell priest, the Doom Slayer must travel to the ARC's headquarters and make contact with Samuel Hayden.

The cyber-mancubus is introduced as an enemy in this level (along with the tyrant and baron of Hell via the Slayer Gate, and the pain elemental via a secret encounter). The marauder is faced as a boss at the end of this level. It uses the music tracks "The Only Thing They Fear Is You", "The Baron of Hell", "Sam's Base", and "Armored Response Coalition".

"Having destroyed the Super Gore Nest, the hunt for the remaining Hell Priest continues. Unable to identify his position due to the Khan Maykr's interference, you travel to the ARC Complex, headquarters of the Armored Response Coalition (ARC), in search of Dr. Samuel Hayden, leader of the human resistance on Earth and the only person capable of finding the final Priest."

― Loading description

Summary

A detailed walkthrough is available for this level.

Objectives

Get Samuel Hayden

Fire the east turret

Fire the west turret

Enter Samuel's base

Confront Samuel

Challenges

• Rune Ensemble - Acquire two runes
• External Combustion - Overload a shield with the plasma rifle to kill six demons
• Rocket Removal - Destroy four shoulder launcher weak points on revenants

Collectibles

Collectible	Count
Albums	2
Cheat codes	1
Codex pages	5
Empyrean key	1
Modbots	2
Praetor suit points	5
Runes	2
Sentinel batteries	3
Sentinel crystals	1
Toys	3

Master Level

A Master Level version of this stage is included, and makes the following changes:

• The number and variety of enemies is greatly increased, significantly raising the level's difficulty. Enemies normally found later in the campaign are included.
• Challenges, secret encounters, collectibles and the Demonic Corruption meter are not present. Dr. Richardson's log entries can still be found.
• The automap station is not present; the entire map is revealed from the start.
• The Slayer Gate is present, but cannot be opened as the Slayer Key is removed.

Gallery

• 

  View of the ARC Complex from ground level.

• 

  The east turret.

• 

  Preparing to fire the west turret.

• 

  Samuel Hayden, inactive, with an ARC Intern guiding the Doom Slayer to him.

• 

  The Slayer faces off with the marauder.

Inspiration and development

• According to Hugo Martin the purple goo puzzle in the sewers was completely different; there should have been a sliding column that swayed from side to side, and player had to spend time to climb the wall.

Trivia

• Some of the ambient music in this level includes notes from "Dark Halls," the music track used in Doom's E1M3: Toxin Refinery.
• One of the Fast Travel destinations in this level is called "The Waste Tunnels," and may refer to the Doom II level of the same name.
• There is a shop at the bottom of the starting building called "The Emerson", a possible reference to Emerson Tung, who created much of Doom Eternal's concept art.
• Both in concept art and in various parts of the actual ARC facility itself, UAC markings can be found which indicates that the ARC headquarters might have originally been a UAC facility (both in-universe and during development). This is further supported that at the ARC tower's entrance, various demonic sigils can be found on the walls.
• Two of the concept art images of this level are labeled under Argent Tower in The Art of DOOM: Eternal.

Bugs

Jumping over the invisible trigger for the west turret elevator and then activating it from one of the back corners will cause the player to be ejected under the elevator once it reaches the top, necessitating a checkpoint reload.