Many years of waiting have made gamers grow old, but still fond of the original Doom games. So fond that the cheats and weapons for those games are still looked up online. Doom 3 is a remake of the first title with an action that takes place on the demon-infested Mars. This being a horror shooter, you might have some troubling nights after playing such a production. Whispers everywhere, demons coming up from behind you ...and sci-fi guns. It's still the modern mindless shooting game, but with some kickass atmosphere within it. Experience the highest levels of fear and sweat a lot while trying to get past beasts that would make the Resident Evil universe jealous. There are tons of cheats for the PC version and the Xbox one is no saint, so there are a couple of tricks you can do to ease your task:

Cheat: Skip Level:
During gameplay, hold LEFT TRIGGER and enter B, A, X, Y.

Cheat List: Ultimate DOOM and DOOM 2:
These are the Ultimate DOOM and DOOM 2 cheats which are only included with the Limited Edition Doom 3 game.

* All Keys, All Weapons, and Full Ammo: hold down LEFT TRIGGER and press A,B,A,B
* Berserk Mode: hold LEFT TRIGGER and press X,X,X,Y.
* End Level: hold down LEFT TRIGGER and press A,A,B,B.
* Chainsaw: hold down LEFT TRIGGER and press B,B,A,A.
* Weapons and Ammo: hold down LEFT TRIGGER and press B,B,B,B.
* GOD Mode: hold down LEFT TRIGGER and press A,A,A,A.
* Invisibility: hold down LEFT TRIGGER and press X,X,Y,Y.
* Light Amplification Goggles: hold down LEFT TRIGGER and press Y,Y,Y,X.
* Radiation Suit: hold down LEFT TRIGGER and press X,Y,Y,Y.
* Show All Map: hold down LEFT TRIGGER and press Y,Y,Y,Y.
* Temporary Invincibility: hold down LEFT TRIGGER and press X,X,X,X.

Cheat: God Mode:
During gameplay, hold LEFT TRIGGER and press X, Y, B, A to become invincible.

Hint: Storage Locker Combos

COMBO LEVEL ITEMS

001 396 -Mars City bullets
003 483 -Recycling 2 clips, grenades, plasma cell, security armor
009 752 -Alpha Labs 1 clip, grenades, large med kits, security armor
013 586 -Admin clip, grenades, security armor, shells
017 347 -Infirmary clip, large med kit, security armor, shells
023 531 -Mars City Underground armor shards, large med kit, shells
038 409 -Alpha Labs 2 clip, grenades, security armor
039 102 -Alpha Labs 2 clips, security armor
047 123 -Alpha Labs 3 clips, grenades
048 123 -Alpha Labs 3 ammo belt, large med kit, plasma cell
049 123 -Alpha Labs 3 armor shards
054 246 -Communications grenades, security armor
054 142 -Monorail grenades, rockets, security armor
063 972 -EnPro Plant plasma cell, plasma gun, small med kit
064 651 -Alpha Labs 4 armor shards, clip, plasma cell
078 364 -Monorail clips, grenades, large med kits
079 364 -Monorail clips, grenades, large med kits
103 259 -Delta Labs Level 2B large med kit, plasma cells, shells
104 579 -Delta Labs Level 4 ammo belt, rockets, security armor
112 538 -Delta 2A armor shards, cells, shotgun
114 715 -Delta 2A backpack, clip, security armor
116 972 -Delta 2A BFG cell, large med kit, plasma gun, security armor
116 624 -Delta 2B bullets, plasma cell, shells
117 624 -Delta 2B BFG cell, grenades, security armor
213 371 -Delta 2B clip, plasma cells, shells
21D 298 -Delta 1 grenades, large med kit, rockets, security armor
317 841 -Delta 4 bullets, clips, large med kits, rockets, security armor
386 836 -Delta 3 ammo belt, bullets, clip, large med kits
387 836 -Delta 3 clip, grenades, large med kit, rockets, security armor
452 571 -CPU Complex grenades, rocket launcher, rockets
666 372 -Delta 2B imp, security armor
669 468 -CPU Complex grenades, plasma cells, security armor

Hint: Martian Buddy Locker Combos:
# COMBO LEVEL ITEMS

001 0508 -Administration ammo belt, chaingun, security armor
002 0508 -Delta 2B BFG, security armor

Easter Eggs

Doom reference
On the last level before you go through the portal to fight the boss. There is a stone tablet somewhere in the last room. If you look at it, you can see the picture of the original Doom cover.

Special PDA from the ID developers
Right at the end of the game, just before you fight the final boss, as you are walking through the underground hall with all the fire and brimstone there will be a small space in one of the corners you encounter that you can duck under and there will be a brick with the ID symbol printed on it. Press action on the brick and it will open the wall allowing you to get the PDA of the ID developers thanking you for playing the game.

Super Turkey Puncher 3
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 that also makes the same faces when you punch the turkeys. First player to 3000 points wins.

Secrets

Hidden movie.
Once you kill the first scientist who gets turned into a zombie, look at the main control panel. One of the screens right near you should be blinking red. Click on it to watch a little movie.

Here's the ending movie! Beware, as there are spoilers inside:



Machine Gun in Underground passage.
After you get the shotgun and reach the security area, go inside and unlock the door. After the door is unlocked, on the same level, look at the bottom of the screen and click on one of the 2 choices. One should bring up the lockers, showing one is locked and the other open. Click on the one that says locked. Now head out into the elevator room and kill the imp that jumps down. Look at the lockers now, the other one is now open, allowing you to have the machine gun and more shotgun ammo. (Note: After you grab all the goodies in the locker, an imp will come out of the door you just came out of to get the goodies.)

Two exclusive levels for Xbox doom3 and Doom3 ROE
Doom3 Collector's edition and Doom3 Resurrection of Evil for Xbox both have Ultimate Doom and Doom2 included with it.

There are two exclusive levels created just for these 2 games…

Ultimate doom secret level - Sewers Episode 1 mission 10
This level can be accessed by going through the first episode Knee deep in the dead in the very first level… The exit is located in the outside area with the blue armor and go against the wall using the action button and you shall exit the level into the new level.

Doom 2 New Secret Level - Betray level 33
To access this secret level, play level 2 entryway, go to the area where you find the red key card, when you get it, a room with sergeants and imps will open, go kill them all and go into that little room with the imps which is on the right side, push the action while you walk around against the wall and you shall exit the level.