Resident Evil Requiem Sterilization Chamber Safe Code — Standard and Insanity

If you are already at the Sterilization Chamber safe and only need the answer, use Right 10, Left 90, Right 20 on Casual and Standard. On Insanity, the combination changes to Left 80, Right 50, Left 0. Complete all three dial movements before pulling the handle. The direction of each turn is part of the lock, so the correct numbers in the wrong order will not open it.

Where is the Sterilization Chamber safe?

You reach the Sterilization Chamber during Grace's ARK section late in Resident Evil Requiem. The safe sits on the work counter in the northeast corner of the room, close to the window and lab glove-box area. The room is on ARK B2, east of the Lab Entrance and before Bioweapon Repository 02. Your first visit can be tense because hostile creatures patrol the area, so clearing or safely bypassing the immediate threat before working the dial is usually the cleaner approach.

• Look for the counter in the northeast corner.
• The safe is on ARK B2, not down with the clue file.
• The nearby Monitor Control Room uses a different combination.

How to enter the combination without resetting it

For Casual and Standard, turn right to 10, reverse left to 90, then turn right to 20. On Insanity, use left 80, right 50, left 0. Do not test the handle after the first or second number: guides for the lock note that trying to open early resets the input. If you overshoot or turn the wrong way, restart the full sequence instead of attempting to salvage it halfway through.

Where is the in-game code file?

The Sterilization Chamber Safe file is in Bioweapon Repository 05 on ARK B3. From the Anteroom route, go down toward the repository and check the open storage container beside the entry stair area. The document rests on the boxes inside. Evil Resource reproduces the emergency-supplies code from the file, while independent route guides confirm the alternate Insanity combination. If you are collecting files, grab it even if you opened the safe earlier using the known code.

What is inside the safe?

The cache contains a Med Injector, one Molotov Cocktail, and 15 rounds of Handgun Ammo. That amount of handgun ammunition is also documented for Standard and Insanity in Evil Resource's item-location data. These are useful supplies for the ARK stretch rather than a cosmetic collectible, so opening the safe can immediately improve your margin for the encounters ahead.

Can you open the safe before finding the note?

Yes. You do not need to collect the clue file before the lock will accept the fixed combination. That makes the safe easy to route on repeat playthroughs or faster runs: reach the room, enter the correct sequence for your difficulty, collect the supplies, and continue. The file still matters for document completion and for players who want to follow the puzzle's intended clue trail.

What to check if the code does not work

Start with difficulty. Insanity does not use the Casual/Standard sequence. Next, verify every turn direction and make sure you wait until the third number before trying the handle. Finally, confirm that you are using the Sterilization Chamber safe, not the nearby Monitor Control Room safe, which has its own numbers. The combination is fixed; a failed attempt is usually an input or difficulty mismatch rather than randomization.

Before you move on

• Safe: Sterilization Chamber, ARK B2.
• Casual/Standard: Right 10 → Left 90 → Right 20.
• Insanity: Left 80 → Right 50 → Left 0.
• Clue file: Bioweapon Repository 05 on B3, inside the open container by the stairs.
• Loot: Med Injector, Molotov Cocktail, Handgun Ammo x15.
• Pull the handle only after all three turns are complete.