Delta Labs - Level 1: Union Aerospace Research Division

"Marine, this is Kelly. If you're watching this, you're tougher than I thought. I guess things aren't always what they seem... Plans have changed, Delta Complex 1's been compromised, you're not safe there. I'm moving to secure Service Tunnel 1. It's not far from your position. We'll meet there..."

- Sergeant Kelly

Delta Labs - Level 1: Union Aerospace Research Division is the fifteenth level of Doom 3. This level contains no demon altercations of any kind for quite some time upon entering it, save some "minor" demonic sounds and lights in some halls and monsters appearing outside from time to time. The Player must initiate power by turning on the main reactor.

Summary
The player enters the Delta Labs, which have been thoroughly wrecked and have lost the main power. As the player ventures into the complex, they have several frightening, but harmless supernatural experiences. They also hear demons all around him, but is not attacked. After retrieving a data linker from the lobby and installing it at the Systems Control, they find a cryptic video message left behind by Sergeant Kelly who warns him that the Delta Complex has been compromised. Kelly advises the player to meet up with him in Service Tunnel 1. After the message from Kelly is viewed, enemies start attacking.

In order to proceed further into the facility, the player must first restore the power, and must battle their way to the main reactor. On the way there, the player finds the Service Tunnel 1, but the Sarge is nowhere to be found. After the player manages to find the reactor and restore the power, they return to the lobby. With the elevators now working, the player proceeds to sector 2.

PDAs

 * Robert Price. Found in Delta Entryway.
 * Brian Mora. Found in Delta Reactor Room.

Characters

 * UAC announcer
 * Sergeant Kelly
 * Malcolm Betruger (voice only)

Weapons/Items
* Contains bullets (20), shells (8), clip (40), grenades (4), health (50).

There are also three health stations on the level, two with 80 health in reserve, and one with 60 health.

Storage Cabinets
For the sources of the codes, see Doom 3 locker codes.
 * Cabinet #21-D: 298. Contains: med kit (large), security armor x2, shells (large), rockets (large).

Secrets

 * In Delta Reactor Support (a corridor) there's a ladder to the left side (from the direction the player is coming from), which leads to a small confined area with a med kit and a zombie in it.
 * In Reactor Service Access room, on the highest floor one can jump over the railing to get some supplies lying below the floor.
 * In Delta Authority Systems room (the one with the elevator in it), there's a gap in the floor with pipes in it and an armor suit sitting under the floor plates.