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Doom 3is 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.
Now get goin, Marine!
It is in the far right-hand corner of the maintenance room.
Locker 001will be right in front of you.
Usecode 3-9-6to initiate the locker containing ammunition for a pistol you haven’t received yet.
However, it will already be open and may not have anything in it.
Locker 023is on the far wall next to a storage crate.
You shouldn’t need a med pack yet unless you hurt yourself walking.
The armor shards will boost your armor level.
Underground Security Checkpoint
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.
Locker 2 is already unlocked and empty, soselect “Locker 1” to fire up the glassenclosure.
Exit the security room and circle to the left to access Locker 1.
Infirmary
As you enter the Infirmary, Locker 017 is visible along the left wall.
Usecode 3-4-7to open it.
The locker contains armor, a med pack, and ammunition for your machine gun and shotgun.
Also, theres a health station on the wall across from the locker.
Marine Command
ReachingMarine Commandis your current objective.
Once you arrive, Sergeant Kelly will pop up on the screen and give you a new mission.
Across the hall from Marine Command is the Weapon Storage Room.
Usecode 5-8-4to bring up the door to the armory.
This room contains armor, med packs, and ammo.
You will see an office to your front.
Enter the office and look toward the back left corner of the room.
There you will seea door with Locker 013 next to it.
Usecode 5-8-6to openLocker 013.
These grenades have athree-second fuse, but they will explode upon impact with an enemy.
Also, it is possible to hold a grenade until it explodes.
This locker gives you a Gatling gunand a small amount of ammo.
But dont worry, youll find tons more ammo as you progress.
If you need health, there are med packs on the desk across from the locker.
As you traverse the stairs,Locker 009will be directly in front of you on the far wall.
Now, look beyond the machine, into the far right corner of the room.
There you will see Locker 038.
Usecode 4-0-9to openLocker 038.
It has armor and some ammo.
Climb that ladder and look behind you.
You will seeLocker 039, which opens usingcode 1-0-2.It contains armor and machine gun ammo.
Usecode 1-2-3forLockers 047, 048, and 049, which are all in Alpha Labs Sector 3.
After leaving the airlock, follow theAL2 Main Engineering Junctionto the small flight of stairs.
Go up the stairs and straight to the first room on the right, which is theHazardous Waste Disposalroom.
Keep that in mind because you will be attacked frequently in this hallway.
Hazardous Materials Lift
After disposing of the toxic barrels, this room will become accessible.
As you enter the Hazardous Materials Lift room, thestorage locker is centered on the far wall.
Take the small stairs to the right and follow the platform around to the left.
Usecode 1-2-3to openLocker 047, which has machine gun ammo and grenades.
Don’t forget to snag the health pack and Gatling gun ammo on the trolley by the stairs.
You will need that key card to access Maintenance Area 4.
As you enter, turn left and dispose of the demon spawn and giant spiders that appear in waves.
On the far wall near the computer terminal in the corner, you will seeLocker 048.
Usecode 1-2-3to open it and grab the health pack and plasma cells inside.
Also, next to the computer terminal is a set of armor and machine gun ammo.
The first time you attempt to go through the window, a demonic force will push you backward.
Your next attempt will be successful.
As you enter the room, look to the right.
On the far right wall of the lower platform, you will seeLocker 049.
Usecode 1-2-3to open it.
Grab the armor shards and ammunition.
This will extend bridges throughout the complex andlead you to the EFR Master Valve room.
As you come off the ladder, look to the right, and on the far wall isLocker 064.
Usecode 6-5-1to open it.
The locker contains plasma cells, machine gun ammo, and armor shards.
Immediately to the left as you enter the room isLocker 063, which opens withcode 9-7-2.
The locker contains a health pack, a plasma rifle, and some plasma cells.
You will not progress without doing so.
Then turn right and go down another set of stairs.
Look slightly to the right, between two columns, andyou will see the door that says Plasma Storage.
Usecode 7-3-4to initiate the door and stock up on plasma cells before heading to the next level.
Usecode 2-4-6to pull up the armor, grenades, and shotgun shells inside.
Use the computer terminalin this room toActivate Sentry, which produces a sentry bot.
You wont be able to advance to the next area without the robots clearance.
You willsee Locker 003 to the right along that wall.
If you hit the monorail airlock, you’ve gone too far.
OpenLocker 003withcode 4-8-3to obtain ammunition for your shotgun, machine gun, and other supplies.
If you unlock Locker 003before the airlock, it will be open now.
If you haven’t, usecode 4-8-3to open it.
This one has armor, machine gun bullets, shotgun shells, and plasma cells.
Just beyond that, in the left corner of the room, you will seeLocker 054.
Usecode 1-4-2to open this locker, which contains armor, rockets, and some shotgun rounds.
Before leaving this room, use the computer terminal and entercode 8-2-6to override theMonorail Airlock Controlsystem.
The train wont move without doing so!
These turrets kill anything, including you.
Upon entering the security checkpoint, there is a door directly across from you that doesn’t work.
Usecode 3-6-4to open both of them.
It is advisable toshut down the automated turrets before proceeding.
To do so, exit the storage room withLockers 078 and 079, and move to thecomputer terminalstraight ahead.
Use your cursor to snag the option that deactivates the turrets.
The duct is on the floor to the right of an inoperable garage door.
Once you’ve crawled through the vent, you will emerge into Storage Room 21-D.
Directly in front of you will be a door with astack of three explosive barrelsnext to it.
That door is your exit.
Using the crate at your feet, hop out of the ventilation duct.
Once you’re out of the ventilation duct, pan right, and you will seeLocker 21D.
Usecode 2-9-8to unlock it.
The locker contains two sets of armor, a med pack, some shotgun shells, and rockets.
Kill all the baddies along the way until you reach the far side of the Records Office.
Locker 113 has already been opened for you.
Usecode 5-3-8to openLocker 112.
This office doesnt have a locker, per se.
But it does have thefirst BFG available in the game!
Usecode 9-3-1to unlock the office of M. Abrams.
Locker 115 is already open.
Taped to the side ofLocker 114is a sticky note withcode 7-1-5.
Use that code to initiate the locker and restock your gear.
The Plasma Inducerneeded for your current objective isdirectly across from Locker 114.
Snag it and take it back to the scientist, I. McCormick.
You will need its credentials to bring up the next door.
Specimen Research Lab
Aftercrawling through a ventilation duct, you will drop into theSpecimen Research Lab.
The scientist there provides thecode 6-2-4for the storage lockers in the next room.
Usecode 3-7-1to open it.
The locker contains ammunition for your machine gun, plasma rifle, and shotgun.
There is a health station to the left as you exit.
It is here that you will findStorage Locker 666, which hascode 3-7-2taped to it.
Youll get more than you bargained for, so use caution when opening this one!
Also known asStorage Area 07, gain access to this room by usingcode 7-2-5.
As with the first one, usecode 0-5-0-8to open it.
The locker will give you some armor and a BFG.
In thestorage area across from the locker,you will find armor, grenades, and various munitions.
If you turn right, you will see another door.
Go through that door into the T1 Access room.
The only things in this small room areLocker 386andLocker 387.
They are on the wall opposite the door you just entered.
Usecode 8-3-6to open both lockers.
D3-1 Storage Room
You will have to teleport into this room.
First, fight your way toTeleport Station 1.
Once you arrive, find the computer terminal that controls the teleportation machine.
This brings you to the D3-4 Storage Room, which does not have any storage lockers.
Fight your way to the next teleportation machine.
This brings you to the D3-1 Storage Room that contains Locker 317.
Usecode 8-4-1to enter the locker and obtain armor, health packs, rockets, and ammo.
You’ll see it as soon as you walk in.
Usecode 5-7-9to fire up the locker.
It contains some armor, rockets, and Gatling gun ammo.
If you need some health, there is a health station on the wall next to the locker.
CPU Complex
Entrance Checkpoint
Look left and you will see a small office.
Enter that office and immediately look left.
You will seeLocker 452, which opens usingcode 5-7-1.
Also, thedesk to the right of Locker 452has some ammo and a shotgun.
To get there,take every elevator upwardsfrom the Lab A Lower Floorslevel.
On the far wall, you will seeLocker 009 and Locker 669.
It has armor, grenades, and plasma cells.
There are other examples of reused locker numbers, like Locker 009.
Those lockers are only represented once on the table.
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