Administration: Union Aerospace Corporate Division

Administration: Union Aerospace Corporate Division is the fourth level of Doom 3. The pinky demon is introduced at a cutscene. The growth taking over the base is first seen, and this is where monsters start teleporting in. The player has the first opportunity to receive a chaingun, locked inside a Martian Buddy storage cabinet. Grenades are also first available here. The player must find William Banks' PDA to continue on to Alpha Labs.

Summary
The level begins with the player arriving at the Administration Complex. As he steps out of the elevator, a cut scene takes over and shows Counselor Swann arguing with Dr. Betruger over a video comm link. Swann states that the situation is out of control and the UAC is assuming control. Betruger is completely unfazed by the chaos surrounding him, and tells Swann that he will handle this matter on his own. He then cuts off the transmission. Jack Campbell opens up his weapons case containing the BFG and prepares to execute "plan B."

The player fights his way from the lobby to the Alpha Labs entrance. However, the doors are locked and he must find Director William Banks's PDA. He also encounters a dying marine E. Webb, who tells the player he was ambushed and that there may still be other marine teams out there. Whether spoken with repeatedly or left alone, Webb eventually dies.

Several new elements are introduced in this level. The player can acquire two new weapons: grenades and the chaingun. After opening the Executive Office doors from the Data Library, the Player is confronted by a new enemy: The pinky demon. In addition, Sergeant Kelly contacts the player over the radio and informs him that there is some kind of unidentified growth taking over parts of the base. This growth is later seen in Malcolm Betruger's office. The demons also demonstrate their ability to teleport here.

After acquiring Banks's PDA from Betruger's office, the player fights his way back to the Alpha Labs doors and gains access to Alpha Labs Sector 1.

PDAs

 * Alan Dorweiler: Located in Alpha Labs Hallway, in the same room as cabinet.
 * Jonathan Moses: Located in North Hallway, near Martian Buddy.
 * William Banks: Located in Executive Offices, near the glowing circle
 * Paul Simons: Located in Global Network Terminal

Video disks

 * Alpha Labs Introduction

Characters

 * Thomas Kelly
 * Elliot Swann
 * Malcolm Betruger
 * Jack Campbell
 * E. Webb
 * UAC announcer

Weapons/Items
* Contains bullets (36), shells (24), clip (60), grenades (10), armor (50).

There's also one health station on the level, with 100 health in reserve.

Cabinets

 * Cabinet #013: 586. Learned in Alan Dorweiler's PDA. Contains: security armor, grenades, shells (small), clip (large).
 * Martian Buddy Cabinet: 0508. Contains: chaingun, ammo belt, security armor.

Secrets

 * In the Alpha Labs Processing room, where the player is attacked by an imp and then by barrel-throwing zombie, the player can jump then crouch through the window that is missing a glass panel into the room with a processing device and find a backpack and some health there.
 * William Banks' PDA can be used to open a locked door in an office on the way to Alpha Labs (the one with a storage crate in it). Through this door the player can access a communications room where Swann and Campbell were seen before, which has some ammo and in it, as well as an armor suit (in the corner).
 * If the video monitor outside Betruger's office door is examined carefully, it can be seen to occasionally distort into an image of a pentagram over a bloody background. At the same time, the text changes rapidly through a short series of corrupt, evil messages: