Doom 3 Cheats (Xbox)

When you each the end Boss, do not bother wasting your ammunition on him. Just stay away
from him. Kill the Imps and other demons and use the Soul Cube on him. If you are play in
co-op mode, shoot him. Use the Soul Cube on him about five or six times. On the last time
you will see an intermission sequence of him dying.

While playing a game, hold L and press X, Y, B, A. Note: The code cannot be enabled
until you take the elevator after being attacked at the start of the game. When a new area
is loaded, the code must be re-enabled to regain its effect.

After you have found the lost scientist and are returning to the main building, find your
way back to the bathrooms. Stand in front of the mirror with your pistol then cycle
through until your shotgun then get very close.

At Chief M. Abram's office, the BFG is in the test chamber when you are there to retrieve
the plasma inducer. You will see the BFG in a test chamber in a room that is locked.
Enter 931 as the code to get the BFG.

Cabinet 001: 396

Cabinet 003: 483

Cabinet 009: 752

Cabinet 013: 586

Cabinet 017: 347

Cabinet 023: 531

Cabinet 038: 409

Cabinet 039: 102

Cabinet 047: 123

Cabinet 048: 123

Cabinet 049: 123

Cabinet 054: 246

Cabinet 054 (second): 142

Cabinet 063: 972

Cabinet 064: 651

Cabinet 078: 364

Cabinet 079: 364

Cabinet 103: 259

Cabinet 104: 579

Cabinet 112: 538

Cabinet 114: 715

Cabinet 116: 972

Cabinet 116 (second): 624

Cabinet 117: 624

Cabinet 213: 371

Cabinet 215: 298

Cabinet 216: 624

Cabinet 217: 624

Cabinet 317: 841

Cabinet 386: 836

Cabinet 387: 836

Cabinet 452: 571

Cabinet 666: 372

Cabinet 669: 468

Martian Buddies 1 and 2: 0508

Monorail Override Junction 5: 826

Monorail Override Junction 5 Junction 7: 953 

Weapons Storage 1 and 2: 584

In the last level, just before you see the intermission sequence before the devil, instead
of going to where the sequence begins the fight with the devil, go left. By the candles
should be an iD Software symbol on the wall. Go towards the brick until you are touching
it (you may have to duck). Press Action (R) when your crosshairs are over it. The brick
will go inside the wall, and the wall behind you to the left will open. In that room will
be a special PDA from iD Software, saying thanks for playing Doom 3 and other
things. You can then fight the devil.

The door code for the plasma room in Enpro Plant Sector 2 is 734. Be careful; leaving that
room causes several creatures to transport directly outside the door, but it is worth it.

While playing a game, hold L and press B, A, X, Y to advance to the next checkpoint.

While playing a game, hold L and press B(4). If you entered the code correctly, you will
hear a sound.

After you acquire the Soul Cube, equip it and wait about one to two minutes. It will
reveal its blades and spin for a very short time.

If you can avoid it, try not to use weapons like the shotgun or others that have difficult
to find ammunition on the weaker zombies. The flashlight (if you are fast enough) or just
the pistol usually will suffice.

While playing a game, hold L and press X(3), Y. If you entered the code correctly, you
will hear a sound.

If the Imp is jumping at you, blast it while it is in the air with the shotgun to kill it
in one shot. This is slightly difficult to time. Additionally, as soon as an Imp has
thrown a fireball at you, strafe around it with your shotgun equipped. Get very close to
the front of the Imp and blast it in the chest. About 95\% of the time, the Imp will die.
Also, when Imps shoot their energy ball at you, crouch underneath it and run at them.
Then, pump them in the face with the shotgun.

Be prepared to die a few times. Beware of the edge of the room, as you can fall off. Also,
do not hide behind the pillars for too long. They will open up and arc electricity
periodically. When you walk into the room, a giant bay door at the opposite end of the
room will open, revealing the "new and improved" Sarge. As soon as that door opens a
crack, start lobbing rockets in there. After you score about six good hits without being
splattered by his BFG, break out the Soul Cube (that you should have charged before
entering the room) and let him have it. It should kill him and heal you. Pick up the
armor and ammunition around the room before continuing. Additionally, use the following
trick to kill the new and improved Sarge much easier. The key is to use the chaingun. It
will blow up his BFG bullets in his face. It will take about thirty seconds to kill him
in this way, and you do not have to use the Soul Cube. There is is a video disc that you
will get just before you fight him that explains the BFG, and says that small arms fire
will blow up the chip in the ball of energy, making it explode instantly.

While playing a game, hold L and press A(2), B(2). If you entered the code correctly, you
will hear a sound.

Successfully complete the game on any difficulty setting to unlock the Nightmare
difficulty setting. When you start in Nightmare mode, you will start with the Soul Cube.

When fighting the Guardian Of The Soul Cube in hell, do not bother shooting his body. This
is a waste of precious ammunition. Instead, blast his "searchers" with something with good
coverage like the chaingun, and he will have to spawn more. When he does, a blue light
will appear over his body. Shoot it with the rocket launcher. Do this a few times and he
will die easily. Also, look in the room around the columns for ammunition, health, etc.

While playing a game, hold L and press X(2), Y(2). If you entered the code correctly, you
will hear a sound.

When a demon teleports in (generally signaled by whisperings, a red tint throughout the
screen, and always red lightning in the location where they will appear), you will have a
split second before they are able to attack. Take a good weapon (for example, a shotgun or
chainsaw for imps and wraiths) and stand close by. For powerful creatures, such as Pinkys,
use a ranged weapon and stand at a safe distance. Remember to save the game often.

While playing a game, hold L and press X(4). If you entered the code correctly, you will
hear a sound.

While playing a game, hold L and press Y(4). If you entered the code correctly, you will
hear a sound.

Play a co-op game on Xbox Live. In the room with about two or three pretty big Pinkeys
(they walk on all fours), there should be a person lying against the wall. On one screen,
it should be there. On the other screen, it is not.

While playing a game, hold L and press Y(3), X. If you entered the code correctly, you
will hear a sound.

While playing a game, hold L and press X, Y(3). If you entered the code correctly, you
will hear a sound.

In Delta Labs Level 3 South, almost as soon as you enter a room, you will see a zombie
marine shooting a scientist. It is possible to save him using the Soul Cube in Nightmare
mode. Make sure you have the Soul Cube charged. As soon as you enter the room, use the
Soul Cube on the marine. The scientist will be unharmed and run away. You must be very
quick when you do, and it may require a few attempts.

While playing a game, hold L and press B(2), A(2). If you entered the code correctly, you
will hear a sound.

While playing a game, hold L and press A(4). If you entered the code correctly, you will
hear a sound.

When you get to Mars City, go to the kitchen. Look closely at the video game in the back
to see a classic Doom screen while you punch the turkey. Additionally, in the last few
levels are stone tablets that feature the original Doom cover.