Single-player games like Diagnosis: Room 101
Below are 8 single-player Steam games similar to Diagnosis: Room 101, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Diagnosis: Room 101 page.
Ranked picks
- 1
The Snare
Single-player alternative to Diagnosis: Room 101 — playable solo, no multiplayer required. Shares Action and Indie with Diagnosis: Room 101.
The Snare is a single-player crime and horror game. Atlas follows clues sent by the masked man to rescue his wife, Samira. As he attempts to uncover the reason behind Samira's abduction, he encounters startling truths, plunging into a labyrinth of deceit and danger.
- 2
County Hospital
Single-player alternative to Diagnosis: Room 101 — playable solo, no multiplayer required. Shares Action and Indie with Diagnosis: Room 101.
County Hospital is a singleplayer offline psychological horror inmersive game with jumpscares and high quality assets. Paranormal activity is happening, gather as much evidence as you can and try to escape from the building without getting caught. Are you brave enough?
- 3
Black Light Kills
Single-player alternative to Diagnosis: Room 101 — playable solo, no multiplayer required. Shares Action and Indie with Diagnosis: Room 101.
Welcome to the darkness of the town; here, you walk a fine line between reality and dreams, questioning your sanity. Black Light Kills takes you deep into Aiden’s mind, where nightmares begin as reality fades.
- 4
Under the bed
Single-player alternative to Diagnosis: Room 101 — playable solo, no multiplayer required. Shares Action and Indie with Diagnosis: Room 101.
Under the Bed is a spine-chilling horror game that will take you on a nightmarish journey into the depths of fear.
- 5
PLAYBACK
Single-player alternative to Diagnosis: Room 101 — playable solo, no multiplayer required. Shares Indie and Adventure with Diagnosis: Room 101.
A first-person horror game where you explore an abandoned shopping street, collect 10 notes, and survive while something hunts you. Stay quiet, search carefully, and escape before it finds you.
- 6
Morrow Creek Tales - Missing Friend
Single-player alternative to Diagnosis: Room 101 — playable solo, no multiplayer required. Shares Indie and Adventure with Diagnosis: Room 101.
Ryan’s best friend, Ethan, has been missing for days. When a strange email leads Ryan to an old cabin outside town, he sets out to find him, unaware of what’s waiting there.
- 7
Downstairs 2 Nightfall
Single-player alternative to Diagnosis: Room 101 — playable solo, no multiplayer required. Shares Action and Indie with Diagnosis: Room 101.
Can you unlock the secrets of darkness and find out what happened to your girlfriend in Downstair 2 Nightfall, developed by the dreamers who harbor the mysterious secrets of history? I don't think so...
- 8
Nightmare
Single-player alternative to Diagnosis: Room 101 — playable solo, no multiplayer required. Shares Indie and Adventure with Diagnosis: Room 101.
Nightmare is a FPS horror game about paranormal events that a police officer encounters in an abandoned house. With its tense atmosphere, it offers the player both excitement and an intense fear experience.