Horror Guide

Who’s at the Door? Guide: When to Open the Door and When to Take Medicine

Who’s at the Door? traps you in a small apartment and then makes you question whether the thing you just saw actually happened. I really liked the Korean apartment horror setup because the game turns one simple decision into the entire source of stress: do you open the door, or do you take the medicine?

FirsthandPlayed & recorded by ItsZebraTVUpdated September 24, 2026 · Built from my own gameplay and coverage.
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Check the apartment before touching anything

When a new cycle starts, take a proper look around the apartment. The entire decision depends on whether the strange things you are seeing are hallucinations, so rushing straight to the door defeats the point.

I would use the same little inspection routine each time. That makes changes easier to spot because you are not randomly checking different rooms in a different order every day.

If the hallucinations remain, take the medicine

The core rule is surprisingly simple once you understand it. If the hallucinations are still present, use the medicine by the door instead of opening it.

The hard part is not understanding that sentence. The hard part is trusting yourself after the game has spent several minutes making your apartment look like it was designed by somebody who hates you.

If the hallucinations are gone, opening the door is safe

If the strange effects do not persist and the apartment has returned to normal, that is your sign that you can open the door and get the medication from the visitor.

Do not make the decision based only on one object. Give the place a quick full check so one missed hallucination does not turn into a very avoidable mistake.

The main loop lasts eight days

You are trying to make the right calls across eight days. That means consistency matters more than speed. Use the same inspection pattern, make the decision and move on instead of inventing a brand new theory every time the lights look suspicious.

There is more than one ending

The game has multiple endings, and the true final ending involves replaying and finding hidden doll pieces. If you finish once and feel like the story is still holding something back, you are not imagining it. A more thorough collectible run is worth doing.

Watch the chaos

Want to see my Who’s at the Door? playthrough?

This guide is the useful version. If you want to see what actually happened when I played it, start with the video below.

Watch the Playthrough on YouTube