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One Room Nightmare
Turn-based strategy horror. Terror in a confined space. Manage your limited power and time to protect yourself from the oncoming enemies and survive until dawn.
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-26.
“Great game, would play again. I did end up having to look up a guide but that's on me wanting to unlock everything. I never did run into the ghost no matter how many times I played though”
— a player, Steam review · 1 hrs played“The gnawing teeth at the front door...the dolls lurking the hall...the ghost whispering beside your bed....these are all scary, sure, but this game makes you confront a terror FAR greater than any monster... Efficient time management!!! Juggle dealing with 5 monsters, each with…”
— a player, Steam review · 1 hrs played“There's no clear directions on how to defend against enemies, freezing the camera when things happen traps the player in a death loop, and gets boring quick. No end in sight, just a headache. The worst kind of confusion that just stops progression. 0/10”
— a player, Steam review · 1 hrs playedAchievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-26.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
version 1.1.1
Adjusted effects of surveillance cameras (easier to see) Changed some of the conditions for adding diaries
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-09-26.
| Genres | Indie, Simulation, Strategy, Free To Play |
| Player tags | Horror · Turn-Based Tactics · Point & Click · Psychological Horror · Free to Play · 3D · Strategy · Simulation · Indie · Survival Horror · Turn-Based Strategy · Immersive Sim (SteamSpy community voting) |
| Features | Single-player · Steam Achievements · Family Sharing |
| Languages | English, Japanese |
| Achievements | 7 |
Minimum system requirements (PC)
Minimum: Requires a 64-bit processor and operating system OS: Windows10/11 Storage: 500 MB available space