Single-player games like Atrium Mortis
Below are 9 single-player Steam games similar to Atrium Mortis, 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 Atrium Mortis page.
Ranked picks
- 1
I'm on Observation Duty 8
Single-player alternative to Atrium Mortis — playable solo, no multiplayer required. Shares Indie with Atrium Mortis.
As an employee of a mysterious organization your job is to monitor live surveillance camera footage and spot anomalies using your sharp eyes and good memory. Can you survive the entire night shift or will you succumb into paranoia?
- 2
Dead Take
Single-player alternative to Atrium Mortis — playable solo, no multiplayer required. Shares Indie and Adventure with Atrium Mortis.
Find your missing friend. Uncover the secrets within. Brave a luxurious and haunting mansion in Dead Take, a first-person psychological horror crafted by Surgent Studios.
- 3
Floor 9
Single-player alternative to Atrium Mortis — playable solo, no multiplayer required. Shares Indie and Adventure with Atrium Mortis.
In Floor 9, you find yourself trapped in a mysterious hotel known as "Hotel Liminal." To escape, you must identify anomalies on each floor. These anomalies can be anywhere - on the ground, in paintings, or even right in front of your eyes.
- 4
The Exit 8
Single-player alternative to Atrium Mortis — playable solo, no multiplayer required. Shares Indie and Adventure with Atrium Mortis.
You are trapped in an endless underground passageway. Observe your surroundings carefully to reach "The Exit 8".
- 5
Visage
Single-player alternative to Atrium Mortis — playable solo, no multiplayer required. Shares Indie and Adventure with Atrium Mortis.
Visage is a first-person psychological horror game. Explore a mysterious ever-changing house in a slow-paced, atmospheric world that combines both uncannily comforting and horrifyingly realistic environments, and enjoy a genuinely terrifying experience.
- 6
Quern - Undying Thoughts
Single-player alternative to Atrium Mortis — playable solo, no multiplayer required. Shares Adventure with Atrium Mortis.
Discover the truth about Quern’s past, unfold the mysteries of its present, and be the explorer who shapes its future. Quern introduces reusable puzzle mechanics to the classic genre, making the player think about the game as a whole, and not just as a series of individual challenges.
- 7
The Norwood Suite
Single-player alternative to Atrium Mortis — playable solo, no multiplayer required. Shares Indie and Adventure with Atrium Mortis.
Explore the mysterious Hotel Norwood in this surreal first-person adventure. Curious characters, forgotten secrets, and head-nodding music await your arrival.
- 8
Dreamcore
Single-player alternative to Atrium Mortis — playable solo, no multiplayer required. Shares Indie and Adventure with Atrium Mortis.
Experience liminal spaces like never before. Dreamcore is the ultimate psychological exploration game, set in the largest liminal world ever made. No guides, no path—only intuition. Will you keep your bearings in a world designed to make you lose them?
- 9
Moral Dilemma: The Interview
Single-player alternative to Atrium Mortis — playable solo, no multiplayer required. Shares Indie and Adventure with Atrium Mortis.
A fourth-wall-breaking narrative adventure. It’s interview day, and you really need this job—enough to ignore the talking printer, the anomaly corridor, and the ridiculous life-or-death trials your interviewer keeps putting you in. But deep down, you know... something here is very, very wrong.