Central Processing: Processing Distribution Center

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Doom 3 maps
Central Processing: Processing Distribution Center
Map name: game/cpu

Central Processing: Processing Distribution Center is the twenty-second level of Doom 3.

"Sarge is waiting for you."
― Sergeant Kelly [source]


Spoiler Warning: Plot details follow.

The level begins with a brief cutscene showing Jack Campbell hunting for Sergeant Kelly in the CPU Complex. The effects of the twisted demonic growth in the base are evident here.

In order to gain access to the facility's Primary Server Bank, the marine must find a replacement door panel to fix a security door near the start of the level. The replacement door panel is located at the top level of Lab A. However, Lab A itself is locked up, so the marine must retrieve Tony Bates' PDA which contains the codes for Lab A. After obtaining the PDA from Security Monitoring and using the codes (627) to access Lab A, the marine makes his way to the upper floor and finds the replacement door panel. He then returns to the entrance, fixes the security door and gains access to an elevator that leads down to the Primary Server Bank.

Just outside the entrance to the Primary Server Bank, the marine runs into a wounded Campbell, who reveals that Sergeant Kelly ambushed him and took his gun, the BFG 9000, and then dies. The voice of Sergeant Kelly taunts the marine, saying, "I killed that pathetic bodyguard. And now I will kill you."


Entrance Checkpoint
Main Entrance Hall
Office 1
Office 2
Security Monitoring Entrance
Security Monitoring
Lab A Entrance
Lab A Lower Floor
Lab A Meeting Room
Elevator 1
Lab A Upper Floors
Elevator 2
Lab A Upper Floor Offices
Office 3
Elevator Access Hall
Elevator 3


Obtain access codes
Obtain access codes for Lab A
Obtain replacement door panel
Find replacement door panel in Lab A to gain access to Data Library
Spoilers end here.



  • Charlie Haskell. Found in Lab A Meeting Room.
  • Tony Bates. Found in an unlockable maintenance storage hatch in Security Monitoring. The hatch can be unlocked by using one of the control panels in the same room.



The enemy count on Nightmare is the same as on Veteran. There are no changes in enemy amount in the BFG Edition.

Enemies Recruit Marine Veteran
Imp 18 19
Trite 26 28
Wraith 13
Cherub* 26 25 27
Tentacle commando 6
Arch-vile 5

* Some of the cherubs are spawned by the arch-viles, thus their amount can vary. Here only number of distinct spawn points is shown.


The item count on Nightmare is the same as on Veteran, except the med kits are absent. There are no changes in the amount of items in the BFG Edition.

Items Recruit Marine Veteran
Shotgun 2
Rocket launcher 2
Bullets (small) 4
Bullets (large) 1
Shells (small) 10
Shells (large) 3
Clip (small) 9
Clip (large) 5
Ammo belt 4
Grenades 3
Cells (small) 10
Cells (large) 1
Rockets (small) 1
Rockets (large) 1
Med kit (small) 1
Med kit (large) 5
Armor shard 44
Security armor 6 5
DLib replacement panel 1

There are three health stations on the level, one with 80 health, one with 50 health, and one with 30 (in BFG Edition two have 100 health and one has 50 health).

Starting inventory[edit]

If the player starts the level via a console command, they will start with these items:

Item Amount
Shotgun 1
Machine gun 1
Chain gun 1
Plasma gun 1
Soul Cube 1
Bullets (large) 1
Clip (large) 1
Grenades 1

Locker codes[edit]

For the sources of the codes, see Doom 3 locker codes.
  • Storage locker #452 - Heavy Weapons: 571. Contains: rocket launcher, hand grenades, rockets (small).
  • Storage locker #669 - Ammunition: 468. Contains: security armor, hand grenades, cells (small) x2.


  • In Security Checkpoint at the start of the level one can use a computer panel to open a security locker that contains an armor vest.
  • In the final room with Campbell in it, there is a missing panel on the floor with a vent shaft leading to a room with lots of supplies.


  • In the Xbox version, the Underground location has been cut. As result, the player meets the dying Campbell in the Elevator Access Hall before using Elevator 3 to exit the level.


External links[edit]

  • Walkthrough video by WoopzillaWalkthrough (part 1; part 2) on YouTube. Veteran difficulty; part of a full game run.