Single-player games like Onionisin
Below are 11 single-player Steam games similar to Onionisin, 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 Onionisin page.
Ranked picks
- 1
Project Three
Single-player alternative to Onionisin — playable solo, no multiplayer required. Shares Indie and Adventure with Onionisin.
A psychological first-person survival horror focused on atmosphere, story and defending yourself with melee and weaponry against several creatures. The story is set in the alternate fan-made universe of Half-Life, Valve Corporation's successful series.
- 2
The Backrooms Footage
Single-player alternative to Onionisin — playable solo, no multiplayer required. Shares Indie and Adventure with Onionisin.
You have found a camera with a footage in it. For some reason you can't rewind the video, and as soon as you try winding it forward you find yourself in the Backrooms. Figure out whats in the footage and try to ESCAPE AS FAST AS POSSIBLE!
- 3
Lawnmower Game Horrorland
Single-player alternative to Onionisin — playable solo, no multiplayer required. Shares Indie and Adventure with Onionisin.
Lawnmower series are back. Collect skulls in different apocalyptic levels. Try to find all skulls under limited time and avoid zombies in this horror driving simulation
- 4
Noitapeli
Single-player alternative to Onionisin — playable solo, no multiplayer required. Shares Indie and Adventure with Onionisin.
First person horror game, you have a special watch in your hand which shows the distance to the noita. Find a bottle which noita needs and bring it back. Use gun, collect mushrooms and avoid noita to find the bottle.
- 5
Pachiko
Single-player alternative to Onionisin — playable solo, no multiplayer required. Shares Indie and Adventure with Onionisin.
You've been trapped in a looping space by Pachiko's mischief! Find the anomaly, choose the right path, and aim for the goal!
- 6
ابو فانوس - Abu Fanous
Single-player alternative to Onionisin — playable solo, no multiplayer required. Shares Indie and Adventure with Onionisin.
Wake up to a mysterious knocking in an empty house. Shadows, cryptic notes, and unsettling events blur the line between reality and fear. Can you uncover the truth, or will the darkness consume you?
- 7
The Last Stop
Single-player alternative to Onionisin — playable solo, no multiplayer required. Shares Indie and Adventure with Onionisin.
You're caught in a cycle of light and darkness in a subway car. This eerie dynamic demands memory, strategy, and swift decisions to traverse the unknown. Each moment of visibility is crucial to reach your goal: "The Last Stop".
- 8
Insomnia
Single-player alternative to Onionisin — playable solo, no multiplayer required. Shares Indie and Adventure with Onionisin.
Experience one night as a man diagnosed with a strange and incurable form of insomnia. Your only goal is to sleep until dawn, but after the lines between your nightmares and your waking life are blurred… you might not want to sleep afterall.
- 9
Second Room
Single-player alternative to Onionisin — playable solo, no multiplayer required. Shares Indie with Onionisin.
It contains two types of games: an game like "8番出口" which you have to escape from an endless series of rooms by progressing to the correct room, and a legacy version in which you have to survive for seven days by looking for anomalies and dolls and completing the game to escape from the room safely
- 10
Coffee shop "Keyhole"
Single-player alternative to Onionisin — playable solo, no multiplayer required. Shares Adventure with Onionisin.
Pick up “words” from conversations and combine them with evidence to uncover the truth behind the cases. A former detective turned coffee shop owner takes on a series of baffling cases. As you get closer to the truth, your own “lost memories of the past” begin to unravel—
- 11
WitchOver
Single-player alternative to Onionisin — playable solo, no multiplayer required. Shares Indie and Early Access with Onionisin.
Watch the witches.Don't miss the anomalies.Despairing witches slowly lose themselves and become monsters. 12:00 AM – 6:00 AM.Your job is to manage the “witches.” As the caretaker of a facility, monitor the witches who possess dangerous powers and resolve any anomalies that occur within the facility.