DOOM 3 - Platform: XBox

Cheats:
-------
Invincibility:
--------------
Open your PDA, go to objectives.
Hold Left Trigger and press X,Y,B,A

Level Skip:
-----------
Open your PDA, go to objectives.
Hold Left trigger then press B,A,X,Y

Collectors edition (Classic DOOM games) 
Enter during play 

Cheat                                      Effect 
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Hold LEFT TRIGGER then Press (A) x4        GOD Mode 
Hold LEFT TRIGGER then Press (B) x4        All Weapons and Ammo 
Hold LEFT TRIGGER then press A,B,A,B       All keys, weapons, ammo 
Hold LEFT TRIGGER then Press (X) x4        Temp Invincibility 
Hold LEFT TRIGGER then Press (X) x3 (Y) x1 Berserk Mode 
Hold LEFT TRIGGER then Press (A) x2 (B) x2 End Level 
Hold LEFT TRIGGER then Press (B) x2 (A) x2 Give Chainsaw 
Hold LEFT TRIGGER then Press (X) x2 (Y) x2 Invisibility 
Hold LEFT TRIGGER then Press (Y) x3 (X) x1 Light Amplification Goggles 
Hold LEFT TRIGGER then Press (X) x1 (Y) x3 Radiation Suit 
Hold LEFT TRIGGER then Press (Y) x4        Show All Map 



Doom 3 [Xbox] Level Skip:
-------------------------
Enter your PDA, the select 'Objectives'. Hold L and press B, A, X, Y. 
Exit the PDA to advance to the next level.

Nightmare Mode:
---------------
Complete the game once under any difficulty setting. When you start on 
Nightmare Mode. you will start with the Soul Cube.

Pumped Up Soul Cube:
--------------------
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.

Saving Ammunition:
------------------
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.

Skip checkpoints:
-----------------
Enter your PDA, then select "Objectives". Hold L and press B, A, X, Y. 
Exit the PDA to advance to the next checkpoint.

Bathroom Scare:
---------------
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.

Classic Doom reference:
-----------------------
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.

Defeating Sarge:
----------------
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.

Defeating the final Boss:
-------------------------
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.

Defeating the Guardian Of 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.

Doom Ultimate and Doom 2: Cheat mode:
-------------------------------------
Enter one of the following codes during game play. A sound will confirm correct 
code entry. Repeat the code to disable its effect.

Doom Ultimate And Doom 2: Toggle God And Degreelessness Mode
Hold L and press A(4).

Doom Ultimate And Doom 2: All Weapons, Health, Keys, And Armor 
Hold L and press B(4).

Doom Ultimate And Doom 2: Temporary Invincibility
Hold L and press X(4).

Doom Ultimate And Doom 2: Full Map
Hold L and press Y(4).

Doom Ultimate And Doom 2: Berserk Mode
Hold L and press X(3), Y.

Doom Ultimate And Doom 2: End Level
Hold L and press A(2), B(2).

Doom Ultimate And Doom 2: Chainsaw
Hold L and press B(2), A(2).

Doom Ultimate And Doom 2: Invisibility
Hold L and press X(2), Y(2)

Doom Ultimate And Doom 2: Light Amplification Goggles
Hold L and press Y(3), X.

Doom Ultimate And Doom 2: Radiation Suit
Hold L and press X, Y(3).

Killing Imps:
-------------
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.

Killing Teleporting Demons:
---------------------------
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.

Super Turkey Puncher Three:
---------------------------
Go to the first level in Co-Op mode and proceed through the level until 'Command 
Access Junction'. There you can find two Super Turkey Puncher arcade machines made 
by 'Nabcon'. On the screen is the face of the original Doom Guy and also makes the 
same faces when you punch the turkeys. First player to 3000 points wins.