Full Metal Coffin

    Crew a submarine with friends, steering through trenches, repairing the vessel and using sonar.

    Developer unknown

    Playing together

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

    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

    A 4 person multiplayer game that has you and your friends man a submarine through treacherous waters. navigate your way though underwater trenches and try to survive the onslaught of dangerous as you scout and plan your way ahead repairing your vessel and using sonar to help guide you.
    From IGDB

    Screenshots

    Why we rate it this way

    • 95% positive from 169 Steam reviews.
    Steam, checked 1 Nov 2026Num reviews: 1Review score: 8Review score desc: Very PositiveTotal positive: 160Total negative: 9Total reviews: 169{"num_reviews":1,"review_score":8,"review_score_desc":"Very Positive","total_positive":160,"total_negative":9,"total_reviews":169}

    Sources

    First listed 1 Nov 2026. Updated 2 Nov 2026.