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No published guide reports different answers for higher difficulty or mission replay. One guide says the Stranded codes “never change,” and the published solutions give specific values for the listed campaign locks. But the sources do not document a controlled check of every code across every difficulty, update, platform, or replay, so treat them as reported fixed answers—not a universal developer guarantee. Match each code to its mission and object, and keep leading zeroes in four-digit codes.
Do Modern Warfare 4 safe and door codes change by difficulty or mission replay?
The guides publish the same code for each named campaign lock rather than separate answers by difficulty or replay. AllThingsHow’s October 20, 2026 guide explicitly says the Stranded answers never change; the available sources do not establish that every lock has been tested under every game condition, however. That makes “the published answers are fixed” a sound practical expectation, while “codes can never change” would go beyond the evidence.
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These are campaign codes, not a general code that opens every lock. The value depends on the mission and the specific object. If a code does not work, first check that you are at the matching lock and have entered every digit—including any zero at the beginning—before concluding that difficulty or replay changed it.
Video Games Chronicle’s campaign code guide lists answers across four missions. AllThingsHow’s guide likewise maps solutions to campaign objects and says completed missions remain available in mission select for recovery. Neither source is an official technical statement from the developers about code behavior across all difficulties, patches, and platforms.
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What are the published safe, door, and keypad codes?
Use the code that belongs to the mission and object in front of you. The table consolidates the 13 solutions reported in the cited guides; the Stranded values are reproduced with their leading zeroes intact.
| Mission | Lock or object | Published code |
|---|---|---|
| Following Orders | Toolbox | 214 |
| Assassins | Door | 5523 |
| Assassins | Door | 7632 |
| Assassins | Door | 9103 |
| Stranded | Keypad / container or bunker lock | 0024 |
| Stranded | Keypad / container or bunker lock | 8609 |
| Stranded | Keypad / container or bunker lock | 0078 |
| Stranded | Keypad / container or bunker lock | 0600 |
| Stranded | Keypad / container or bunker lock | 1234 |
| Stranded | Keypad / container or bunker lock | 6789 |
| Stranded | Keypad / container or bunker lock | 0330 |
| Stranded | Keypad / container or bunker lock | 0008 |
| Escape | Safe | 8410 |
The published summary of the VGC guide describes six Stranded keypad values, while AllThingsHow reports 13 total solutions across four missions and supplies the eight Stranded values shown above. The table follows the complete set of 13 published answers in the AllThingsHow guide; it does not claim that every guide presents the same count or coverage.
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How should I enter a code with leading zeroes?
Enter all four digits exactly as shown. A code such as 0024 is not interchangeable with 24, and 0008 should not be shortened to 8. The published Stranded list also includes 0078, 0600, and 0330, so preserve each zero when entering the keypad value.
This is an easy mistake when copying a code from a page or note that formats numbers without their initial zeroes. Treat the answer as a sequence of keypad digits rather than an ordinary number: four-digit entries remain four digits even when the first one or more are zero.
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What should I do if a code does not work?
Check the mission and lock first; the sources do not identify one universal code for the campaign. Then verify the digits, especially any leading zero, and confirm that you are using the answer listed for that particular object.
- Identify the mission. The list covers Following Orders, Assassins, Stranded, and Escape. A code from one mission should not be assumed to apply to another.
- Match the object. Following Orders has a toolbox code; Assassins has three door codes; Stranded has multiple keypad answers; Escape has a safe code.
- Re-enter every digit. Keep the full four digits for Stranded codes such as
0024and0008. - If you missed the lock or its contents, replay the relevant campaign mission. AllThingsHow reports that completed missions remain available in mission select. Use the answer for the specific object again; the guide does not describe any special replay-only code.
If the exact listed answer still fails, the available sources do not establish whether a particular update, platform, or other condition can alter the result. They also do not document a universal troubleshooting fix beyond checking the mission-object mapping and replaying the relevant mission to recover a missed lock.
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What does the evidence establish—and what does it leave open?
For practical use, the evidence supports treating the listed answers as stable, object-specific campaign solutions. AllThingsHow says the Stranded answers never change, and the guides provide fixed values without listing alternate versions for different difficulty settings or replays.
That is not the same as proof that every code was compared on every difficulty or after every update. The sources do not provide a controlled comparison, nor an official Activision or Infinity Ward technical statement covering all platforms and patches. A careful answer to the title question is therefore: the published guides do not report codes changing with difficulty or replay, but universal invariance has not been independently established by the cited evidence.
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The game includes a single-player campaign, and the cited TechRadar review describes returning to campaign content through mission select. This article’s code list applies to those campaign locks; it should not be read as a claim about other modes or unrelated locks.
Frequently Asked Questions
Are these codes for the campaign or multiplayer?
The cited code guides cover campaign locks in named missions. They do not establish codes for multiplayer or other modes.
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The guides do not list replay-specific alternatives, and AllThingsHow says Stranded answers never change. They do not report a controlled replay comparison for every lock, so that narrower universal claim remains unverified.
Why does 0024 fail when I enter 24?
The listed answer is a four-digit keypad sequence, not merely the numerical value twenty-four. Enter both initial zeroes as part of the code.
What if I finished the mission but missed a safe or keypad?
AllThingsHow says completed missions remain available through mission select, so replaying the relevant campaign mission is the documented recovery route for missed locks or contents.
