Doom 3 Security Access Code Door Level 3

[Amatista Sheeley]

InDoom 3, security codes are used to unlock storage vaults and other locked facilities. They are almost always retrieved via emails or audio log entries from PDAs on the same level. Many of the heavy weaponry and massive powerups are password-protected, therefore the more codes discovered, the better armed the marine becomes.

RESEARCH ENTRANCE and TELEPORT OBSERVATION

Leave the TELEPORTER CHAMBER and head into the RESEARCH ENTRANCE. Head down the hall, and turn right up the stairs. At the top of the stairs, from your right, a flaming zombie jumps out and charges towards you. Kill the zombie, and head to the TELEPORT OBSERVATION room.

DATA CONTROL TERMINAL and MAINTENANCE CORRIDOR

The hall curves to the left, and there are two commando zombies just right of the end of the hall (one armed with a machien gun). Clear 'em out (the rocket launcher is effective in this situation) and continue exploring the room. Activate the control panel by pressing the "UNLOCK STORAGE AREA" button and turn around to open the "STORAGE 02" door.

Just inside the SERVICE AREA, to the right, is a zombie waiting in the darkness. Inside you'll also find a health station, armor, and extra rockets. Exit back to the control terminal and go through the second door in the room to enter the MAINTENANCE CORRIDOR.

CENTRAL PROCESSING, COMMON AREA and RESEARCH LABS CORRIDOR

Just left of the doorway is a zombie in the darkness, and behind him is zome health and clips. Head through the door at the other side of the room to enter the COMMON AREA ACCESS. There's nothing to worry about here, so just walk yourself into the COMMON AREA.

As you enter the common area, three imps spawn, and one's behind you (down the hall). In the kitchen of the common area you'll find some health and adrenaline, which will both be useful as you head down the RESEARCH LABS CORRIDOR.

Continue down the hall and shoot down the imp that spawns in front of you. To the right is a doorway that, when approached, is opened up by a commando zombie that comes charging towards you. Peek your head through the door and you'll see another commando (this one armed with a machine gun) taking cover behind some boxes. Take him out as quickly as possible and then step into the SUPPLY LIFT ACCESS room.

SUPPLY LIFT ACCESS and SPECIMEN RESEARCH LAB

Another machine gun commando is left down the hall. Take him out and then take the lift upwards to the upper portion of the SUPPLY LIFT ACCESS, and then out to the UPPER OFFICER CORRIDOR.

There's an archvile downstairs in the room, and it's spawning a number of imps upstairs. Clear out the room and enter the main hall. To the left is a busted door that you won't ever be able to open. Instead, look for the short crawl space to the right and enter the VENTILATION DUCT. Crawl through it and drop down into the SPECIMEN RESEARCH LAB below. You won't have to worry about enemies for the time being.

As soon as you drop into the research lab, you'll startle a scientist that's at work. Listen to his tale to learn the lockers that are in the back of the room (to the left). Open up the lockers with the passcode he gave you (624) and gather the items inside. When you've got that, go to the other end of the hallway, jump over the boxes, and continue to RESEARCH CONTROL.

RESEARCH CONTROL and STASIS TRANSFER

Upstairs across the room is an archvile spawning imps below. Clear the area from the hall and then step into the room. As you do, a commando will jump down from the walkway above and charge towards you. Further in the room, around the corner to the right, another commando zombie comes through the doorway. Kill him, and gather the health that's in the island cabinet in the room before continuing to the STASIS CHAMBER.

There's nothing to worry about in the stasis chamber. To the left is a locked doorway, so continue right into the STASIS CONTROL JUNCTION. On the wall to the right is a small control panel to open the service area. Click it, and then go through the grated doorway next to the switch to enter the MAINTENANCE AREA 4.

Climb down the ladder in the room and start making your way through the narrow corridors. At the end of the hall is an imp that just devoured the screaming man. On the body of the man you'll find the PDA of Jacob Stemmons. Grab it and climb the ladder in the back of the hall to earn some armor, health, and plasma cells, before heading back down the narrow halls and back of the maintenance area.

Make use of the health station as needed and open up the locker with the combination learned from a previous PDA (371). As you open up the next door to enter another portion of STASIS TRANSFER, watch out for the imp that lunges at you from the left before contiuing down the next dark hall.

Three more imps will jump out at you from the shadows as you follow the canisters for light. When you reach the end, open up the next door and watch for another imp that jumps at you through the door.

LIFT ACCESS and ANALYSIS CONTROL

There's a second imp in the LIFT ACCESS room to watch for. Grab the video disk inside, and then take the lift inside up. At the top of the lift, head down the to your left and watch for an imp to jump at you from behind a trick wall in the corner of the room.

Continue to the ANALYSIS CONTROL room and activate the strange machine in the room. There's another video disk in the room, along with the PDA of Larry Bullman. Make use of the health station if need and, only if you need some more armor, you can open up the locker in the room. The combination for the locker is 372, though when you open it an imp will jump out from the locker. Inside you'll only find some armor, which is easily skipped if you don't need it.

RESEARCH CONTROL CORRIDOR and TECHNICAL DIRECTOR OFFICE

As you enter the next room, an imp jumps up and over the railing to your right. You can shoot it before it recovers from the jumping animation, letting you prepare for the commando that comes behind it. Open up the door at the end of the hall and prepare for a bloodbath. Three commando zombies charge in, and two of them have machine guns!

Step into the CENTRAL PROCESSING area and watch out for the imp that spawns from the left at the end of the hall. To the left is a doorway to the TECHNICAL DIRECTOR OFFICE, in which you'll find the PDA of Elizabeth McNeil. On the other side of the central processing room is the SECURE STORAGE room. Open it up with the access code from the PDA (725) and then open up the cabinet inside (0508) for the BFG weapon.

Head back to the central processing room and open up the "LEVEL 3 ACCESS" door with the other code found on the PDA (463). As you open up the door, an archvile spawns in front of you, summoning a commando zombie behind you. Destroy the two of them and take the elevator to exit the level.

I'm at the communications transfer center/maintainance and transfer station. There's a lift that will take you to the control station and then to the exit. The stations on the lift are numbered 1-3 with 3 being the exit. Once at the exit, the keypad at the door tells me I need to get access through security station 1. I activated the only security station I can find and it tells me the doors are open, but the exit won't let me out. I've checked all the doors, tried every side door I can find, used the lift to go up, down and sideways and still can't get out. Anybody know how to get the heck out of here? I've got screenshots, if I can post them. Appreciate the help! Krum

Doom 3 is a classic first-person shooter that takes place on Mars. It is a challenging game and nearly impossible to beat in a Nightmare campaign. Luckily, the game designers left supplies and ammunition lockers scattered throughout each level. These life-sustaining caches provide precious ammo, armor, and health packs that give us a fighting chance to escape the Red Planet.

After following the sentry bot from Marine Command to the Maintenance bay, Locker 001 will be visible from the entry door. It is in the far right-hand corner of the maintenance room. Take the stairs down to the lower floor, turn right, and head up the small set of stairs.

As you enter the Energy Stabilization Unit from Convergence Chamber 1, turn right and follow the hallway until you see the next door. Before going through that door, look left, and you will see a small alcove with a storage locker.

This is where you were first issued your armor, pistol, and ammo. You will come back to this security room to unlock the door using the computer terminal. While on the computer, move your cursor to the banner that says "Mars City Sublevel Access". This will bring up a menu with six options.

Select "Entrance Lockers" and you will see a screen that shows the status of Locker 1 and Locker 2. Locker 2 is already unlocked and empty, so select "Locker 1" to open the glass enclosure. Exit the security room and circle to the left to access Locker 1.

Central ProcessingAs you approach the door at the end of the hall, an imp will spawn in the small room to the left and, almost simultaneously, another will appear behind you. In the room to the left you'll find a locker that can be opened with the code 571. Open up the door inside this small room and you'll immediately run into a wraith. Take it out.

The next open hall branches in multiple directions. The door to the room directly in front of you is locked, so for now turn left and head into the first office door. You'll find the PDA of Tony Bates, and an imp will spawn behind you as you grab it. The next office room down the hall has a bunch of ammo to grab. Stock up, then exit the office and follow the hallway left.

As you round the final corner, get your soulcube ready to take down the archvile that spawns directly in front of you. You'll need the code 627 to open the door to Lab A. Head down the hall to the right and jump across the panels to reach the door that leads to Lab A Lower Floor. As you go down the first hall and past an elevator, watch for the cherubs that come from the left.

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