There are three types of swinging doors, normal swinging door, coin door, and wrong/right-way door.
Normal[]
The normal swinging door.
A locked swinging door.
A swinging door beside another swinging door.
The most common variant littered throughout the hallways. It has windows which the player can see through to view incoming characters. Every character (excluding It's a Bully and Chalkles) can open this door. This door does not need to be interacted with to be opened, but instead requires physical contact. The Swinging Door Lock can only be used on this type of swinging door.
Swinging doors may appear next to each other, notably with the cafeteria.
Coin[]
The coin door.
The coin door first appears as an ordinary swinging door that has a realistic photo texture of a coin slot in a deep reddish-purple color, and it is printed with "25¢" and "PUSH TO REJECT" text below.
The coin door appears in some hallways and requires the player to insert a Quarter into the slot of the coin door. If the player does not insert a Quarter into the coin slot, nobody can pass through the door, essentially acting as a permanent Swinging Door Lock.
After inserting a Quarter into the coin slot, the coin door will change into an ordinary swinging door permanently, becoming accessible.
Principal of the Thing scolding the player (seen in the caption) from the other side of the coin door.
Like with a locked normal swinging door, NPCs can see the player through the coin door.
The player and other characters can open one-way swinging doors* with green arrow icons and go through it. On the other side, there is a door with a red line icon, which cannot be opened once it has been closed. Even if the wrong-way door is opened, NPCs will not go through the door, but instead, they will go in a different direction. If this door is still open, the player can go through it regardless of side.
These swinging doors are available on Floor 2, Floor 3 and Endless Mode - Random.
The only types available in each current challenge are normal and coin doors, while the Stealthy Challenge has only normal swinging doors.
Other appearances[]
In Baldi's Basics Classic, Baldi's Basics Birthday Bash and Baldi's Basics Classic Remastered, only the normal swinging doors are featured. At the start of the game, the player will be unable to go through the first three swinging doors, with one in front of them and one to the left and right, until they have collected two notebooks. These doors also lead through exits that are found after the player collects 7 notebooks in Story Mode. There are 8 swinging doors in total.
For some odd reason, the opening sound for the swinging doors is the one for the standard doors instead of the usual opening sound.
Glitches[]
Baldi's Basics Plus[]
Rarely, two swinging doors will spawn in the same spot. The Swinging Door Lock can easily expose this.
NPCs can close swinging doors if one is generated near a standard door.
If It's a Bully spawns near swinging doors, these doors keep opening until he leaves the spot.
Prior to V0.6, Baldi could try to pass through the locked swinging doors connected to an outdoor area and could get stuck if the player was in there. He would go to other locations if they used a BSODA to push him or a Dirty Chalk Eraser to hide from him.
