Phobos Labs - Sector 3: Main Reactor


Doom 3: Resurrection of Evil maps
Phobos Labs - Sector 3: Main Reactor
Map name: game/phobos3

Phobos Labs - Sector 3: Main Reactor is the ninth level of Doom 3: Resurrection of Evil. The player must shut down the reactor and life support systems in order to bring the Phobos teleporter back online.


The marine returns to SkyTram Station South from Sector 2 and boards the tram to Sector 3. After arriving there, he goes through Reactor Systems and finds the Reactor Core, which he needs to shut down. The door to Reactor Control is locked with the keycard. To obtain the keycard, the marine needs to use lifts to ride to the bottom of Reactor Core and get to Lower Maintenance, where the keycard is located on the lowest floor. He then rides back, accesses Reactor Control and shuts the reactor down.

After doing so he activates a bridge using a control panel just outside of Reactor Control and goes to Reactor Support, where he rides an elevator and gets ambushed by a serious amount of monsters. Then he enters Energy Processing and finds a sentry bot which helps him get through this area filled with monsters. In the end, the marine finds an elevator that takes him to an airlock. After going through a very short surface area to the next airlock, he finds another elevator that takes him to Lower Cargo Tunnels. Inside them he fights more monsters, including Hell knights.

After going through all this madness, the marine finds Environmental Control where he shuts down Life Support Systems and leaves Sector 3 via a nearby airlock.


Shutdown Reactor
Shutdown [sic] the Phobos Labs Main Reactor.
Life Support Systems
Shutdown [sic] Phobos Labs Life Support Systems.
Experimental Teleporter
Take the Skywalk to the Phobos Labs Experimental Teleporter.






The enemy count on Nightmare is the same as on Veteran.


There are no item amount differences in Doom 3: BFG Edition.

Items Recruit Marine Veteran Nightmare
Shotgun 1
Machine gun 1
Plasma gun 2
Rocket launcher 1
Bullets (small) 1
Shells (small) 2
Shells (large) 2
Clip (small) 1
Clip (large) 4
Ammo belt 7
Grenades 1
Cells (small) 12
Cells (large) 1
Rockets (small) 2
Rockets (large) 1
Med kit (large) 6 5 0
Armor shard 18
Security armor 3
Air canister 1
Artifact charge 10 3
Reactor Key 1

There are five health stations on the level, each has 100 health in reserve.

Starting inventory[edit]

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

Item Amount
The Artifact 1
Grabber 1
Flashlight 1
Shotgun 1
Double barrel shotgun 1
Machine gun 1
Chaingun 1
Plasma gun 1
Rocket launcher 1
Grenades 1

Locker codes[edit]

For the sources of the codes, see Doom 3 locker codes.
  • Storage locker #009 - Supplies: 492. Contains: security armor, clip (large), ammo belt x2.


  • In SkyTram Station South one can climb down the ladder to bottom of the room and find a rocket launcher and a med kit there.


  • This level is divided into two parts on the Xbox version of the game: Phobos Labs: Reactor Control and Phobos Labs: Life Support.
  • The Cargo Tunnels are notably less populated with enemies in the BFG Edition. The original game has a large number of revenants as well as Hell knights in the tunnels, but only the Hell knights are present in the BFG Edition.


External links[edit]