A complete, verified list of storage-locker and door codes for Doom 3, Resurrection of Evil, and The Lost Mission. All codes are the same across the 2004 original and the BFG Edition, and have been cross-checked against community references.
Doom 3 is a first-person shooter developed by id Software and published by Activision in 2004, released first for Microsoft Windows on August 3, 2004, followed by Linux later that year and an Aspyr Media macOS port in 2005. It’s set in the year 2145 on Mars, where a military-industrial conglomerate runs a research facility devoted to teleportation, biological research, and weapons design — until an experiment tears open a door to Hell. Many of the game’s best weapons, armor, and supplies are locked inside storage lockers, and this guide lists every code you need.
Heading into 2026, Doom 3 remains a beloved classic horror FPS, available on Steam, GOG, and the Bethesda Launcher (often under $5 on sale). The BFG Edition (2012) bundles improved visuals, Resurrection of Evil, and The Lost Mission — and importantly, the locker codes are identical across every version, so the list below works whether you’re playing the original or the BFG Edition on modern hardware like the Steam Deck.
The codes below are listed in the order the lockers first appear in the game.
Doom 3 locker codes
Mars City
- Locker #001 (next to the elevator): 396
- Medical Lab, Locker #017: 347
- Weapons Storage Room: 584
These early codes grant maintenance tools, medkits, and ammo — useful before the first major demon wave.
Alpha Labs
- Sector One, Locker #009: 752
- Sector Two, Locker #038: 409
- Sector Two, Locker #039: 102
- Sector Three, Lockers #047 / #048 / #049: 123 (same code for all three)
- Sector Four, Locker #064: 651
Administration
- Locker #013 (near the health station): 586
- Martian Buddy Cabinet: 0508
Enpro Plant
- Theresa’s office, Locker #063: 972
- Plasma Storage Locker: 734
Central Communications Tower
- Sentry Bot Control, Locker #054: 246
Waste Recycling Center
- Locker #003 (near the airlock): 483
Monorail: Facility Transport
- Security Office, Locker #054: 142
- Monorail airlock locker: 826
- Lockers #078 / #079 (near the gun turret): 364 (same code for both)
Delta Labs — Level 1
- Storage Room, Locker #21D: 298
Delta Labs — Level 2A
- Records Office, Locker #112: 538
- Locker #901 (BFG): 931
- Locker #116 (near the Halon control panel): 972
- Operations Server Room, Locker #114: 715
Delta Labs — Level 2B
- Maintenance Corridor, Locker #103: 259
- Specimen Lab, Lockers #216 / #217: 624 (same code for both)
- Locker #213 (bottom of the elevator): 371
- Analysis Control, Locker #666: 372
- Storage Area 07: 725
- Final room (with arch-vile): 463
- Martian Buddy Cabinet: 0508
Delta Labs — Level 3
- Lockers #386 / #387 (near the large teleporter): 836 (same code for both)
- Locker #317 (near the teleporter control panel): 841
Delta Labs — Level 4
- Control Room, Locker #104: 579
Central Processing / Distribution
- Locker #452 (near the security checkpoint): 571
- Lab A door: 627
- Lab A, Locker #669: 468
Doom 3: Resurrection of Evil locker codes
Resurrection of Evil is the first-person expansion for Doom 3, adding several new areas with their own lockers.
Erebus — Level 2
- Elevator Bay, Locker #029: 516
Erebus — Level 3
- Chemical Storage, Locker #105: 769
- Sarge’s double-barrel shotgun case: 428
Erebus — Level 4
- Main Office, Lockers #407 / #408: 937 (same code for both)
Erebus — Level 6
- Armory, Lockers #034 / #035: 134 (same code for both)
Phobos Labs — Sector One
- Storage Locker #042: 714
- Martian Buddy Cabinet: 634
Phobos Labs — Sector Two
- Bridge retraction code: 281
The Lost Mission locker codes (BFG Edition bonus)
The Lost Mission is the campaign added in the BFG Edition. Its codes:
- Locker #054: 631
- Locker #071: 532
- Locker #104: 579
- Locker #108: 847
- Lockers #805 / #806: 372
- Display cabinet: 428
How to enter locker codes in Doom 3
Approach any numbered locker or keypad and interact (default E on PC). Enter the code exactly using the on-screen keypad. In the game itself, codes are almost always hinted at in nearby PDAs — via email or audio-log entries — so reading them adds to the exploration and horror atmosphere. If you’d rather not hunt, the list above has you covered. It’s worth doing a quick save before experimenting; an incorrect code simply does nothing.
What the lockers contain
Storage lockers hold armor shards, ammunition, health packs, grenades, and occasionally weapons — including the BFG-9000. On higher difficulties like Nightmare, these supplies can turn a punishing run into a manageable one, letting you focus on the story and the scares rather than constantly scavenging.
A note on the BFG Edition and modern platforms
The BFG Edition improves the visuals and includes the DLC, but the locker codes match the 2004 original exactly (only some PDA text differs). The Steam and GOG releases run well on Windows 11 with no patches needed for the codes to work. For a related read, see our guide on the technology you need to game.
Conclusion
Doom 3’s locker codes are a small but genuinely useful part of surviving the Mars facility — they hand you the gear to face the demonic onslaught without breaking the game’s tension. Whether you’re replaying the 2004 classic or diving into the BFG Edition on modern hardware, the codes above are complete and unchanged. Bookmark this guide and good luck on Mars. For more, browse our other gaming guides.
FAQs
What are the Doom 3 locker codes for Mars City and the early levels?
The key early codes are 396 for Locker #001 (next to the elevator), 347 for Medical Lab Locker #017, and 584 for the Weapons Storage Room. These provide early ammo and armor and are identical across all editions.
Are the locker codes different in the BFG Edition?
No. All codes are the same as the 2004 original, including Resurrection of Evil and The Lost Mission — only the visuals and controls were improved. The Martian Buddy cabinets still use 0508.
How do I find locker codes in the game without using a guide?
Read the PDAs — emails and audio logs near the lockers almost always reveal the code shortly before you need it. Approach the keypad and enter the digits. This preserves the game’s atmosphere for players who prefer to discover codes naturally.
What rewards do the storage lockers give?
Lockers contain armor shards, bullets, shotgun shells, medkits, and occasionally rare weapons like the BFG. Early lockers help you survive the first demons; later ones offer bigger boosts.
What is the code for storage locker #103?
Locker #103 is in Delta Labs Level 2B (Maintenance Corridor), and the code is 259. In-game, the code is revealed via a nearby PDA.
What is the code for storage locker #112? Locker #112 is in the Records Office in Delta Labs Level 2A, and the code is 538.
What is the “free stuff” / Martian Buddy locker code?
The Martian Buddy “free stuff” cabinet code is 0508, found early in Mars City. It contains ammo, grenades, med kits, and armor. The code is hinted at via a promotional email on an in-game PDA.
What are the main security door codes in Doom 3?
Commonly referenced door codes include the Weapons Storage door (584) in Mars City, Lab A’s door (627) in Central Processing, and Storage Area 07 (725) in Delta Labs Level 2B. As with lockers, these are found on nearby PDAs during play.
All codes have been cross-checked against community references (including the Doom Wiki and established guides) and are current for the original Doom 3 and the BFG Edition. Codes have not changed across versions.
