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Doom 3 Cheats, Codes, Hints, Tips

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Cheat: Various Door Codes

Below are a list of some door lock codes so you don’t have to spend unnecessary amounts of time figuring them out.

  • Broken Airlock Door - 826
  • Fire Blast Valve (Mars City) - 842
  • Lab A Access - 627
  • Michael Abrams’ Door - 931
  • Plasma Storage - 735
  • Weapons Storage (Mars City) - 584

Hint: Duck Hellfire

The projectiles thrown by the imp and hellknight can be ducked if you time it correctly (it will do no damage). Naturally, you want to do this against enemies on the same height as you, not on shots coming at diagonals.

Cheat: God Mode

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

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.

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