Subterror

    Players explore abandoned undersea biosphere domes in a co-op group.

    Team Monumental

    Playing together

    Online co-op
    1 source
    Players in online co-op
    1 source
    Players online
    1 source
    Early access
    1 source
    Plays like
    Not known yet
    Online versus, Online multiplayer, Best with, How co-op works, Crossplay, Local co-op, Multiplayer through mods, One copy is enough, Free to play, Plays in browser, Demo, Playtest

    Hover, focus or tap a fact to see where it came from.

    How you talk

    Not known yet
    Plays without voice or typing, Wordless tools, Public matchmaking, Friendly with strangers

    About the game

    At the bottom of the ocean floor lie The Biospheres. These weather-controlled domes once supported vast arrays of lifeforms, but have since been abandoned. Explore arid deserts, dark forests, and frozen tundras. But don't stay too late, as you are not alone out in the great abyss.
    From IGDB

    Screenshots

    Why we rate it this way

    • 89% positive from 478 Steam reviews.
    Steam, checked 1 Nov 2026Num reviews: 1Review score: 8Review score desc: Very PositiveTotal positive: 426Total negative: 52Total reviews: 478{"num_reviews":1,"review_score":8,"review_score_desc":"Very Positive","total_positive":426,"total_negative":52,"total_reviews":478}

    Sources

    First listed 1 Nov 2026. Updated 1 Nov 2026.