IMHO.

Single-player games like Dark of the Depths

Below are 8 single-player Steam games similar to Dark of the Depths, 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 Dark of the Depths page.

Ranked picks

  1. 1
    7821 Akuji — Steam game cover

    7821 Akuji

    Single-player alternative to Dark of the Depths — playable solo, no multiplayer required. Shares Simulation with Dark of the Depths.

    7821 Akuji is a first person liminal horror experience. Pilot a tiny, jury-rigged submersible to rescue a lost science crew.

    2025IndieAdventureSimulation8.99 USDSingle-playerSimilar games →
  2. 2
    Ocean Pressure — Steam game cover

    Ocean Pressure

    Single-player alternative to Dark of the Depths — playable solo, no multiplayer required. Shares Simulation with Dark of the Depths.

    Ocean Pressure is a singleplayer game where you as an old scientist piloting your handmade submarine in the bottom of the ocean. Your mission is explore the ocean and collect required data with help of your submarine.

    2023IndieAdventureSimulation2.99 USDSingle-playerSimilar games →
  3. 3
    subROV : Underwater Discoveries — Steam game cover

    subROV : Underwater Discoveries

    Single-player alternative to Dark of the Depths — playable solo, no multiplayer required. Shares Simulation with Dark of the Depths.

    Pilot a remotely operated submarine and explore the oceans! Defy the darkness and crushing pressure of the deeps as you chart unknown regions and study new species of ocean life.

    2022SimulationCasualEarly Access19.99 USDDeck VerifiedSingle-playerSimilar games →
  4. 4
    It Sleeps Below the Haar — Steam game cover

    It Sleeps Below the Haar

    Single-player alternative to Dark of the Depths — playable solo, no multiplayer required.

    A short exploration game, set in a secluded coastal village in North East Scotland. Explore Kellas Bay and it's surrounding forests, caves and ocean to uncover what lies beneath the fog-covered village.

    2024IndieAdventure7.99 USDDeck PlayableSingle-playerSimilar games →
  5. 5
    Submergent — Steam game cover

    Submergent

    Single-player alternative to Dark of the Depths — playable solo, no multiplayer required. Shares Simulation with Dark of the Depths.

    Explore and navigate an underwater cave in your submarine.

    2024AdventureSimulation1.99 USDSingle-playerSimilar games →
  6. 6
    Submarine VR — Steam game cover

    Submarine VR

    Single-player alternative to Dark of the Depths — playable solo, no multiplayer required. Shares Simulation with Dark of the Depths.

    Submarine VR takes you on a adventure-filled underwater simulation experience! Dive deep and cruise through the endless uncharted nature of the ocean and you will see clownfish, dolphins, penguins and mysterious sea animals. Get close to the sea surface and sail in the open sea with your cruise ship

    2021ActionIndieAdventure9.99 USDSingle-playerSimilar games →
  7. 7
    Behind Glass: Aquarium Simulator — Steam game cover

    Behind Glass: Aquarium Simulator

    Single-player alternative to Dark of the Depths — playable solo, no multiplayer required. Shares Simulation with Dark of the Depths.

    Create stunning virtual aquariums on your PC! Our advanced 3D engine brings your fish tank to life with breathtaking realism, featuring lifelike fish, plants, decorations, and more. Transform your monitor into a vibrant, living aquarium. Virtual aquascaping has never been easier!

    2025IndieSimulationCasual14.99 USDDeck PlayableSingle-playerSimilar games →
  8. 8
    СИМУЛЯТОР ЛАЗАНЬЯ ПО ЗАБРОШКАМ — Steam game cover

    СИМУЛЯТОР ЛАЗАНЬЯ ПО ЗАБРОШКАМ

    Single-player alternative to Dark of the Depths — playable solo, no multiplayer required. Shares Simulation with Dark of the Depths.

    At its core, it's not really a game. Rather, a short tour of the authentic post-Soviet courtyard, which has long been abandoned by local residents.

    2023ActionIndieAdventure0.99 USDSingle-playerSimilar games →