
The various door codes in FNAF: Secret of the Mimic act as obstacles to reach those all-important presents. Monitors and Mail lend a helping hand, but figuring out the combination is down to you, and evading the Mimic remains top of the agenda.
For finding collectibles, secrets, or to simply progress through the story, there are multiple avenues you can venture down by getting past those pesky door codes in Secret of the Mimic. A game design mix of System Shock, Alien: Isolation, and Fallout; exploration is tied to both your curiosity and Data Diver permissions. The security terminal map is helpful to see where you haven't gone, but it's down to you to remember which doors require a code or higher clearance. But we're here to help you get into new areas where collectibles may be tucked away.
Here are all the door code solutions in FNAF: Secret of the Mimic.
Conference room code will be added shortly.
Table of contents
All door code solutions in FNAF: Secret of the Mimic
Hallway code (2 door)

This is the first keypad you will run into in Secret of the Mimic, as it appears incredibly early on. I immediately wanted to ignore Dispatch's instructions when I saw the enticing red buttons on the giant keypad. This door is in the first hallway you enter using the diamond access on the Data Diver. The answer to it, however, is back at the start of the game, specifically inside the Security Office. This is where you need to repeatedly backtrack to as it's how Arnold and Dispatch communicate. Look at the monitors in the Security Office to see the five digits you need to unlock the hallway.

The hallway door code is 2 6 2 9 4. There isn't much you can do with this at the start of your playthrough, as you need higher clearance to access more rooms behind it. You can, however, pick up the Clean-O-Vac Film Reel from a cabinet in the hallway behind the giant keypad mechanism.
Birthday Showroom code

I took yet another detour from the mission when I saw a new area I could venture into inside the Showrooms. This separate area from the Top Boy boss arena houses a singular Showroom called the Birthday Showroom. There is a collectible you can find in this room, but it's behind a locked door with higher clearance. Behind the giant birthday cake with Mrs. Helpful atop it is the next code you need to figure out. All you need to do is go to the Employees Only office back at the Showroom Welcome Lobby and look at the monitors.

The combination isn't obvious because it's unclear which monitor you're meant to refer to as the first digit in the sequence. Through testing, however, the code to open the Showroom door is 4 7 8 2. This takes you back to the room where Jackie in a Box was. You can crouch-walk through the hole Jackie left behind to reach a new (albeit tiny) area.
Jackie in a Box code

After unlocking the Showroom door, you can immediately look for this code in the narrow hallway behind where Jackie in a Box first spawned. This tiny area houses the Mimic, so be careful navigating around it. You can lure him over to the right-hand side by pressing the cut-out button and hiding in the nearby locker (closest to the hallway). Doing this means you can walk past him without him noticing you. Go into the larger room and crouch to the left, climbing atop some debris to enter a ventilation shaft. Following this through lets you see two monitors that have the clue to the door code.

The answer to this door is based on the white blocks with a thick black font to show their numbers in the sequence. As zero and four are obvious because of their placement, we then need to look for the remaining two numbers that match the appearance of these blocks. That gives us the code combination of 0 4 3 4.
Big Top code

You reach the upper level of the Theatre after playing carnival games, getting the grand prize, and avoiding Big Top's wrath. Big Top quits his job on the spot and leaves the room via the ceiling (as you do). This leaves a group of mannequins standing in a circle, all sporting different hats. There's a number on the back of each mannequin.

This code won't be the same for you, as the hats on the board next to the keypad are randomly generated. All you need to do is refer to the hats on the board and then check the Theatre floor for the number corresponding to each hat, worn by the mannequins. For our code, we had: Top hat (3), Bug ears (6), Fez (7), and Crown (1).
Showroom Retail code

This is one of those codes you may not have found, as it's in an area that unearths a terrifying secret MCM was desperately trying to hide. Located in the Retail Showroom, the only way to access this area is by upgrading your Data Diver to the Executive level (infinite symbol). The Retail Showroom has two floors, with a large open room that the Mimic loves to randomly spawn in. You should be able to crouch-walk through this area without being spotted, but can always utilize the cut-outs and mannequins to distract the Mimic.

The answer to the keypad at the back of the room (near the carousel) is found on the monitors around the Retail Showroom. There are five total, but understanding the order is only possible by using the Data Diver on the mailboxes in the room. The sequence is divided into days, making this the most cryptic. The answer is based on where each monitor resides inside the Showroom, corresponding to the description given on the Log (check the terminal near the carousel to access Mail).
The order is as follows:
- Monday - Happy Flowers - 8
- Tuesday - Main Office - 0
- Wednesday - Main Door - 6
- Thursday - Where you stand all day - 2
- Friday - Over the Ocean - 5
Therefore, the code is 8 0 6 2 5.
Edwin Office code

There's half an hour's worth of gameplay left to do if you wish to complete the Parachute.exe ending. After visiting the Diner, Arnold enters the Murray house and is tasked to figure out the code to Edwin's Office. To do so, you must refer to the Polaroid on the projector in the only safe room of the house. This shows an image of a blackboard with the word "DAVID" written out in different colors. The color order indicates the sequence order. DAVID corresponds to Green (one), Magenta (two), Blue (three), Red (four), and Yellow (five). This is always the order.

This code is randomly generated, so what we got in our playthrough may not work for you. Instead, look out for the five film reels in Edwin's house. There are two on the ground floor, two on the first floor, and one behind the staircase. Each is located in a filing cabinet (the same as every other film reel in Secret of the Mimic). Insert them into the projector and watch it to its end to get a digit which corresponds to the color of the reel. Refer to the polaroid for each digit's placement in the sequence.
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