IMHO.

Single-player games like 18th Floor

Below are 8 single-player Steam games similar to 18th Floor, 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 18th Floor page.

Ranked picks

  1. 1
    Anomaly Hotel — Steam game cover

    Anomaly Hotel

    Single-player alternative to 18th Floor — playable solo, no multiplayer required. Shares Indie with 18th Floor.

    You start from the 10th floor in a hotel and must make your way to the exit. However, you must look for any potential anomalies on each floor to safely make it out.

    2024IndieAdventureSimulation3.99 USDDeck PlayableSingle-playerSimilar games →
  2. 2
    Midnight Prowl — Steam game cover

    Midnight Prowl

    Single-player alternative to 18th Floor — playable solo, no multiplayer required. Shares Indie and Casual with 18th Floor.

    Midnight Prowl is a horror exploration game set in a Japanese town, where you will experience the horror that takes place there.

    2023IndieSimulationCasual2.99 USDSingle-playerSimilar games →
  3. 3
    Unable to Exit 8 — Steam game cover

    Unable to Exit 8

    Single-player alternative to 18th Floor — playable solo, no multiplayer required. Shares Indie with 18th Floor.

    You receive an invitation on a "special" dating app, get excited and then get involved in an endless cycle of couples' hotels. You have to watch carefully for any unusual information. Can you solve these puzzles?

    2024IndieAdventureSimulation4.99 USDSingle-playerSimilar games →
  4. 4
    Table 9 — Steam game cover

    Table 9

    Single-player alternative to 18th Floor — playable solo, no multiplayer required. Shares Indie and Casual with 18th Floor.

    Deliver coffee to 9 tables in a looping European-style specialty cafe, spot the anomalies creeping in and reach Table 9.

    2026IndieAdventureSimulation1.97 USDSingle-playerSimilar games →
  5. 5
    Turning Manor — Steam game cover

    Turning Manor

    Single-player alternative to 18th Floor — playable solo, no multiplayer required. Shares Indie and Casual with 18th Floor.

    All you have to do is count the differences and choose an exit. Easy right? Yet strange things start happening as soon as you sign the job contract… It's up to you to uncover what is happening at Turning Manor.

    2026IndieAdventureSimulationSingle-playerSimilar games →
  6. 6
    The Sleepless Nights Origins — Steam game cover

    The Sleepless Nights Origins

    Single-player alternative to 18th Floor — playable solo, no multiplayer required. Shares Indie and Casual with 18th Floor.

    A first-person psychological horror walking simulator. The same rain-soaked corporate street, looping. Notice what's wrong before it notices you back.

    IndieAdventureCasualSingle-playerSimilar games →
  7. 7
    Ritual — Steam game cover

    Ritual

    Single-player alternative to 18th Floor — playable solo, no multiplayer required. Shares Indie with 18th Floor.

    Ritual is a first-person psychological horror game. Immerse yourself in this sinister experience of terror, where everything familiar becomes strange to you, find the necessary elements to complete the ritual and solve the mystery.

    2023ActionIndieAdventure4.99 USDSingle-playerSimilar games →
  8. 8
    Horror School Story — Steam game cover

    Horror School Story

    Single-player alternative to 18th Floor — playable solo, no multiplayer required. Shares Indie and Casual with 18th Floor.

    Immerse yourself in the foreboding atmosphere of Enspire School of Digital Art, brought to life with realistic graphics. Solve intricate puzzles and face psychological challenges to progress through the nightmarish school environment. FACE YOUR FEAR and ESCAPE THE NIGHT.

    2024IndieAdventureCasual0.99 USDSingle-playerSimilar games →