Little Nightmares III Guide | How to Find the Locked Door Key (Chapter 4)

Here's a guide on how to find the Locked Door Key in chapter 4 of Little Nightmares III.

Game Guide by Ragib Rawnak on Oct 19, 2025

In this part of Chapter 4 of Little Nightmares III, your objective is to locate the Key required to unlock the door at the top of the stairs. You will need to use your surroundings strategically to deal with obstacles and acquire the Key.

Little Nightmares III, Guide, How to Find the Locked Door Key, Chapter 4

Finding The Locked Door

After reaching the top of the stairs, you will see a locked door on your left. To get the key, move to the right side of the hallway. Here, you will notice a Woman standing at a table, interacting with various items.

However, you cannot approach her directly because a Plant is positioned in the upper-left corner near her, blocking the way in Little Nightmares III.

Little Nightmares III, Guide, How to Find the Locked Door Key, Chapter 4

Using The Vending Machine

Locate the Vending Machine nearby and pull its Lever to dispense a Soda Can. Pick up one of the Soda Cans and throw it toward the Woman. The noise will draw her attention, causing her to walk toward the Can.

Little Nightmares III, Guide, How to Find the Locked Door Key, Chapter 4

Acquiring The Key

The Plant will strike the Woman as she moves toward the Soda Can. The path will be clear once both are stopped. Get close to the area and pick up the Key that the woman dropped. You can move on to the next part of the game by going back to the Locked Door at the top of the stairs and using the Key to open it.

Also, check our Little Nightmares III Review and other guides below: