Single-player games like Under Observation
Below are 8 single-player Steam games similar to Under Observation, 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 Under Observation page.
Ranked picks
- 1
Evil Officer
Single-player alternative to Under Observation — playable solo, no multiplayer required. Shares Strategy and Casual with Under Observation.
You are kidnapped and locked up in Jail. Can you escape? Well, it's not gonna be easy when the Evil Officer is roaming around!
- 2
Phantom Asylum VR
Single-player alternative to Under Observation — playable solo, no multiplayer required. Shares Strategy and Indie with Under Observation.
"Phantom Asylum" is a VR horror experience set in an abandoned mental hospital haunted by restless phantoms. Navigate its twisted corridors, where every step could lead you deeper into madness. Can you survive the asylum's secrets, or will you become another ghost trapped within its walls?
- 3
Spooky Horror Game
Single-player alternative to Under Observation — playable solo, no multiplayer required.
A psychedelic horror shooter. A prison, four monsters, and you. Collect items and keys to survive. Don't let them find you.
- 4
Horror In Valkeala
Single-player alternative to Under Observation — playable solo, no multiplayer required. Shares Indie and Simulation with Under Observation.
Solve puzzles and mysteries and try find hidden Valkeala logo at this Fps horror puzzle
- 5
Anomaly Corridor
Single-player alternative to Under Observation — playable solo, no multiplayer required. Shares Indie and Simulation with Under Observation.
Navigate a seemingly endless corridor, uncovering eerie anomalies as you struggle to escape your doomed ship!
- 6
Foreign Fortress
Single-player alternative to Under Observation — playable solo, no multiplayer required. Shares Indie and Casual with Under Observation.
Escape from the Alien, find necessary items that allow you to escape and cure the virus, and bring hope to humanity, yourself, and your family.
- 7
Prey
Single-player alternative to Under Observation — playable solo, no multiplayer required.
In Prey, you awaken aboard Talos I, a space station orbiting the moon in the year 2032. You are the key subject of an experiment meant to alter humanity forever – but things have gone terribly wrong. The space station has been overrun by hostile aliens and you are now being hunted.
- 8
Greyhill Incident
Single-player alternative to Under Observation — playable solo, no multiplayer required. Shares Indie with Under Observation.
This story-driven Survival-Horror game is about a classic Alien-Invasion which takes place during the early 90s. As Ryan Baker, equipped with a baseball bat and a few bullets in his revolver, the story takes you across the atmospheric neighborhood of Greyhill which is invaded by UFOs & Grey Aliens.