Single-player games like Experiment 404
Below are 8 single-player Steam games similar to Experiment 404, 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 Experiment 404 page.
Ranked picks
- 1

The Cabin Factory
Single-player alternative to Experiment 404 — playable solo, no multiplayer required. Shares Indie and Adventure with Experiment 404.
Your job at the Cabin Factory is simple: inspect the cabins and decide on whether they’re haunted or not. If you do find any anomalies, get out…immediately.
- 2

Next Station is...
Single-player alternative to Experiment 404 — playable solo, no multiplayer required. Shares Indie with Experiment 404.
You operate the final subway train of the night. Inspect each platform, watch the passengers, and decide whether to open the doors or leave the station behind. Make the wrong choice, and something may board with them.
- 3

Route8
Single-player alternative to Experiment 404 — playable solo, no multiplayer required. Shares Indie with Experiment 404.
"You're lost on Route 8. You must find a way to escape. This eerie road is terrifying.""Night falls, the phone rings. Who are you? You find yourself driving along Route 8, repeating endlessly."
- 4

Who's at the door?
Single-player alternative to Experiment 404 — playable solo, no multiplayer required. Shares Indie and Adventure with Experiment 404.
You are trapped in a small house, suffering from psychosis with no memory. Carefully observe your surroundings to distinguish reality from hallucinations, and overcome your illness by taking medication from visitors at the right time.
- 5

Below, Rusted Gods
Single-player alternative to Experiment 404 — playable solo, no multiplayer required. Shares Indie and Adventure with Experiment 404.
You are the lifeline supporting an expedition into the unknown. Keep both yourself and your squad alive by interpreting instrument readings, explore the facilities, and uncover something ancient and eager to be born.
- 6

Hatch
Single-player alternative to Experiment 404 — playable solo, no multiplayer required. Shares Indie and Adventure with Experiment 404.
"Hatch is a single-player, first-person horror game. You find a hatch in your room and strange things start to happen to you. You are the target of psycho killers. You have to find the truth behind the hatch and escape from the crazy world.
- 7

Visage
Single-player alternative to Experiment 404 — playable solo, no multiplayer required. Shares Indie and Adventure with Experiment 404.
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.
- 8

Platform 8
Single-player alternative to Experiment 404 — playable solo, no multiplayer required. Shares Indie and Adventure with Experiment 404.
You are trapped on a train that runs forever. Keep an eye out for anomalies and find a way out.