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A Doom 3 lock pad.

Doom 3 Locker Codes

The people on Mars might have met their doom, but their lockers live forever! Get the codes for them with this guide.

Despite its age, players are still crazy about Doom 3! With the newer releases from the franchise, many players want to feel nostalgic and remember what it was like the first time you fought your way through hell in this 2004 classic.

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What better way to destroy the gruesome aberrations you'll face than to access the secret areas and obtain hidden equipment? More than that, you can unlock the detailed story behind what happened on this overrun planet by accessing lockers with the secret codes listed below.

Doom 3 Locker Codes

Here are the locker codes for the base game listed in order of how they appear.

  • Mars City
    • Locker #001 next to elevator: Code - 396
    • Locker #017 in Medical Lab: Code - 347
    • Locker in Weapons Storage Room: Code - 584
  • Mars City Underground
    • Locker #023 in Energy Stabilization Unit: Code - 531
    • Locker next to valve control panel: Code - 842
  • Administration
    • Locker #013 next to health station: Code - 586
    • Martian Buddy Cabinet: Code - 0508
  • Alpha Labs 
    • Locker #009 in Sector One: Code - 752
    • Locker #038 in Sector Two: Code - 409
    • Locker #039 in Sector Two: Code - 102
    • Locker #047 in Sector Three: Code - 123
    • Locker #048 in Sector Three: Code - 123
    • Locker #049 in Sector Three: Code - 123
    • Locker #064 in Sector Four: Code - 651
  • Enpro Plant
    • Locker #063 in Theresa's office: Code - 972
    • Locker in Plasma Storage: Code - 734
  • Central Communications Tower
    • Locker #054 in Sentry Bot Control: Code - 246
  • Waste Recycling Center
    • Locker #003 near the airlock: Code - 483
  • Monorail: Facility Transport
    • Locker #054 in Security Office: Code - 142
    • Locker in monorail airlock: Code - 826
    • Locker #078 near gun turret: Code - 364
    • Locker #079 near  gun turret: Code - 364
  • Delta Labs - Level One
    • Locker #21D in Storage Room: Code - 298
  • Delta Labs - Level 2a
    • Locker #112 in Records Office: Code - 538
    • Locker #901 with BFG: Code - 931
    • Locker #116 near Halon control panel: Code - 972
    • Locker #114 in Operations Server Room: Code 715
  • Delta Labs - Level 2b
    • Locker #103 in Maintenance Corridor: Code - 259
    • Locker #216 in Specimen Lab: Code - 624
    • Locker #217 in Specimen Lab: Code - 624
    • Locker #213 at bottom of lift: Code - 371
    • Locker #666 in Analysis Control: Code - 372
    • Locker in Storage Area 07: Code - 725
    • Martian Buddy Cabinet: Code - 0508
    • Locker in final room with arch-vile: Code - 463
  • Delta Labs - Level Three
    • Locker #386 near large teleporter: Code - 836
    • Locker #387 near large teleporter: Code - 836
    • Locker #317 near teleporter control panel: Code - 841
  • Delta Labs - Level Four
    • Locker #104 in Control Room: Code - 579
  • Processing Distribution Center
    • Locker #452 near security checkpoint: Code - 571
    • Door of Lab A: Code - 627
    • Locker #669 in Lab A: Code - 468

Related: Doom Eternal: Ancient Gods - Atlantica Facility - All Secrets - Pro Game Guides

Doom 3: Resurrection of Evil Locker Codes

Doom 3: Resurrection of Evil was the first DLC added to the game. It added three areas that contained lockers. Here are the codes.

  • Erebus - Level Two
    • Locker #029 in Elevator Bay: Code - 516
  • Erebus - Level Three
    • Locker #105 in Chemical Storage: Code - 769
    • Sarge's double barrel shotgun case: Code - 428
  • Erebus - Level Four
    • Locker #407 in Main Office: Code - 937
    • Locker #408 in Main Office: Code - 937
  • Erebus - Level Six
    • Locker #034 in Armory: Code - 134
    • Locker #035 in Armory: Code - 134
  • Photo Labs - Sector One
    • Locker #042 in Storage: Code - 714
    • Martian Buddy Cabinet: Code - 634
  • Photo Labs - Sector Two
    • Retracting Bridge: Code - 281
  • Photo Labs - Sector Three
    • Locker #009 in Reactor Control Room: Code - 492
  • Delta Labs - Unknown
    • Locker #116 in Specimen Lab: Code - 634

The Lost Mission Locker Codes

The Lost Mission was a DLC released several years after the game was released. It added three new areas with lockers.

  • Enpro - Sector Two
    • Double barrel shotgun display case: Code - 731
  • Underground - Part One
    • Locker #054 in first room: Code - 631
  • Underground - Part Two
    • Locker #108 in second revenant room: Code - 847
  • Exis Labs - Part One
    • Locker #104 in Security Office: Code - 579
    • Locker #965 in Teleporter Security: Code - 428
    • Locker #071 in bruiser room: Code - 532
  • Exis Labs - Part Two
    • Locker #805 in Central Operations Room: Code - 372
    • Locker #806 in Central Operations Room: Code - 372

The more lockers you open, the better chances you have at decimating those escaped demons that are hell-bent taking you down, so be sure to find them all!

If you're a fan of the DOOM franchise, be sure to check out some of our other guides for the latest releases like All secrets of the Atlantica Facility in Doom Eternal: Ancient Gods.


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Nicholas Fries
Freelance writer and jack-of-all-hobbyist-tech-development-trades (website, game, and program). My passion is to create content that entertains and makes people think critically.