FNAF Secret of the Mimic brings back the tense corridor walks and runs, as you try outrun scary monsters while trying to uncover the secrets of the Costume Manor. The game brings along with its fair share of puzzles to solve and codes to unlock. However, if you are playing the game more for the scares, in this guide, we have put up all the door codes in FNAF Secret of the Mimic.
Main Hallway Door Code (Workshop area) | 26294

Enter the Main Hallway, and take the right to the Workshop area. There will be a door straight ahead, and the code is 26294. Check our guide here for the full details on this area.
Birthday Showroom Door Codes | 4782 | 0434
As soon as you enter this area, take the door on the right. You will come across a large birthday cake with a door behind it. The code to this door is 4782.
Take the door to enter a dimly lit area. Enter into a shaft through the opening designed to look like a gift. Follow the linear path till you arrive at a locked gate. Take the right path and you will come to a lever that unlocks that door. Also press the red button next to it to lure the monster, and quickly hide in the locker. Now, once you see the outline of the monster walk by, come out of the locker and sneak your way past the open gate. Continue on the linear path till you arrive at the second Birthday Showroom Door. The code to unlock this door is 0434.
Retail Showroom Door Code | 80625
Make your way down the stairs, and keep moving to the right till you come across a red-colored shutter. The code that you need to enter on the panel next to it is 80625. Once the door is unlocked, enter the door, press the red button and take the elevator to the basement.
Admin Wing Door Code | 01350
As soon as you enter the area, sneak and hide in the locker till you see the monster go by, and then slowly make your way left to come across the Admin Wing Door. This door opens with the code 01350.