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
8AM: The Subway
Single-player alternative to Diagnosis: Room 101 — playable solo, no multiplayer required. Shares Action and Indie with Diagnosis: Room 101.
"8AM: The Subway" is a suspense game set in the subway after midnight. Watch the security cameras as eerie events unfold and decide if it’s fatigue, malfunction, or something far darker until 8:00 a.m.
- 6
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...
- 7
Apparition
Single-player alternative to Diagnosis: Room 101 — playable solo, no multiplayer required. Shares Action and Indie with Diagnosis: Room 101.
First-person survival horror with ghosts and demons. Find yourself smack in the middle of a haunted forest in the dead of night. Talk to spirits through your Spirit Board. Capture evidence of the paranormal, but beware, fiercely aggressive demons are on the hunt.
- 8
Parasomnia
Single-player alternative to Diagnosis: Room 101 — playable solo, no multiplayer required. Shares Action and Indie with Diagnosis: Room 101.
Parasomnia is a horror game in the style of backrooms. The accompanying excellent visual will allow you to plunge into the nightmare happening around the hero. Mitya is not a fighter, he can only run. Realistic camera and sound complement your emotions.