Doom 3 presents a formidable challenge for players navigating the desolate and hostile environments of Mars. Survival hinges on efficient resource management, as ammunition, health packs, and armour are often scarce during intense combat encounters. Throughout the game, players encounter storage lockers and secure containers that conceal valuable supplies. However, accessing these caches requires specific numeric codes. The source material provides a comprehensive breakdown of these locker codes across the original campaign, as well as the "Resurrection of Evil" and "The Lost Mission" expansions. Understanding how to locate and utilise these codes is a critical component of gameplay strategy, allowing players to secure vital equipment such as med kits, plasma ammo, and BFG cells without relying solely on random drops from defeated enemies.
The mechanics of these storage lockers are straightforward but essential. Located in various map areas—ranging from Maintenance and Alpha Labs to Delta Labs and Hell—these lockers feature keypads requiring a three-digit combination. The source data indicates that while some codes are provided within the game through PDAs or audio logs, others are best accessed via a dedicated guide to ensure players do not miss out on essential supplies. The information provided across the sources focuses heavily on the numerical combinations and their corresponding locker numbers or locations. It is important to note that the sources provided are third-party gaming guides rather than official developer documentation, but they present consistent data regarding the codes required for progression.
Original Campaign Locker Codes
The primary Doom 3 campaign features numerous storage lockers scattered across Mars City, the Alpha Labs, and the EnPro facilities. The source data compiles a list of locker numbers and their corresponding unlock codes. For example, in the initial areas of Mars City, players can find lockers that provide early-game essentials such as med kits and bullets. Locker 001, located in Mars City, requires the code 396 to open. Another locker, number 003 in the Mars City Underground, requires the code 483 to grant access to shotgun shells and bullets.
As players progress into the Administration and Alpha Labs sectors, the supplies become more varied, often including armour and grenades. The Alpha Labs sectors are particularly rich in these lockers. For instance, Sector 1 contains Locker 023, which opens with 531 to provide shotgun shells and armour. Sector 2 features Locker 038 (code 409) and Locker 039 (code 102), offering health, clips, grenades, and bullets. Sector 3 contains a cluster of lockers requiring the same code: Locker 047, Locker 048, and Locker 049 all use the code 123, containing health kits, shells, armour, and bullets respectively.
Moving into the EnPro Plant, Locker 064 (code 651) is a high-value target containing plasma ammo. The Communications area includes several lockers, such as Locker 103 (code 259) for clips, grenades, and shells, and Locker 116 (code 972) for health and armour. In the Delta Labs, players will find Locker 317 (code 841) containing a BFG cell and med kit, and Locker 965 (code 428) in Delta Labs 2A offering a BFG cell and plasma gun ammo. The final area, Hell, features Locker 666 (code 372), which provides health, cells, and armour.
Resurrection of Evil and The Lost Mission Codes
The "Resurrection of Evil" expansion introduces new regions and challenges, along with a fresh set of storage lockers. The source material lists specific locker numbers and codes for this DLC. For example, Locker 009 requires 492, Locker 034 requires 134, and Locker 042 requires 714 (noted as 716 in one source variation). High-value lockers include Locker 407 (code 937) and Locker 408 (code 937). Locker 028 and Locker 029 both use 516. A specific "Other Code" mentioned is for the Security Core Bridge, which requires 281 to unlock plasma ammo. Another notable code is 428 for the Display Case in Sarge’s Office, which unlocks a med kit.
"The Lost Mission" DLC also features a distinct set of lockers. Locker 054 requires 631, Locker 108 requires 847, and Locker 104 requires 579. Locker 965 uses 428, and Locker 071 uses 532. The expansion also includes a Coolant Control Room Display Cabinet requiring code 731.
Door Access and Security Codes
Beyond standard storage lockers, the game features secure doors that also require numeric access. The source data lists several of these door codes alongside their locations. For example, Storage 07 Door in Central Processing requires 725, and Level 3 Access Door in the same area requires 463. The CPU Lab A Door Access in the Main Entrance Hall requires 627. In the Delta Labs, the Security Chief M. Abrams Office door requires 931 to access the first BFG-9000. Other specific doors include the Monorail Airlock Site 2 Junction 5 Airlock (code 826) and the Plasma Storage Door in Enpro Section 2 (code 734).
Strategic Importance of Locker Codes
The source material emphasises that gear is extremely limited in Doom 3, and health is often low. The chaotic, claustrophobic gameplay makes every regain of health or armour a critical currency. Storage lockers conceal valuable items that can turn the tide of a battle against clusters of Imps, Revenants, or Hell Knights. While some codes are found through natural gameplay progression via PDAs or audio logs, relying on a comprehensive list ensures that players do not have to backtrack or miss out on supplies. Supply lockers specifically hold items like BFG cells, grenades, and rocket ammo, which are otherwise difficult to find. Therefore, utilising these codes is not just a convenience but a vital strategy for survival.
Conclusion
The provided source material offers a detailed compilation of locker codes for Doom 3, covering the original campaign and its expansions. These codes are essential for unlocking storage lockers and secure doors that contain critical supplies such as ammo, health kits, and weapon upgrades. The data highlights specific locker numbers and their corresponding codes, alongside the locations where these lockers can be found. By using these codes, players can significantly improve their resource management and survivability in the harsh Martian and Hell environments. The consistency of the data across multiple sources suggests a reliable reference for players seeking to maximise their inventory during gameplay.