One Room Nightmare

Turn-based horror where monsters move only after you act

RenKon · Released Jun 7, 2024

Reviews: Very Positive; 83% of 112
Recent reviews: Not enough recent
Players: 0; daily peak, Oct 28, 2026
Steam Deck: Playable
Last update on Steam: 2 years ago; Jun 19, 2024
Minimum PC: 0.5 GB disk; Full requirements

What is One Room Nightmare?

You are trapped in an apartment room in this single-player, point-and-click horror strategy game. You switch lights, open and close doors, and hide in shadows while managing limited power and time. Observing enemy behavior earns experience points that unlock information about each monster and how to defend against it.

For you if...

+you prefer planning each move without real-time pressure
+you want a short horror game for solo play

Not for you if...

−you dislike jump scares and trial-and-error survival

What players say

83% of 112 reviews are positive

Players praise the turn-based horror concept and figuring out how to counter individual creatures. Some find repeated deaths confusing or repetitive, with complaints about unclear defensive instructions.

Screenshots and trailer

One Room Nightmare system requirements

Minimum: 0.5 GB of disk space.

As published by the developer.

Can my PC run One Room Nightmare?

The published requirements do not name a graphics card we can compare.

Set up my PC →

Minimum

OS: Windows10/11
Storage: 500 MB available space

Does One Room Nightmare have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does One Room Nightmare run on Steam Deck?

Playable Playable: it runs on Steam Deck with some adjustments.

Sometimes shows mouse, keyboard or non-Deck controller icons
The native resolution is not the default one
All functionality is accessible with the default controller configuration
In-game text is legible on Steam Deck
Default graphics settings perform well on Steam Deck

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows
Achievements: 7
Steam features: Family Sharing
Languages: Text only: English, Japanese.

Does One Room Nightmare use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam