Backrooms Lost Unit

Find yourself lost in the Backrooms in this co-op journey for 1 to 4 players. Explore eerie levels, solve puzzles, and find your way out using scavenged items. Entities lurk everywhere, and the deeper you go, the deadlier it gets.

Launch options

Hourly peaks, UTC. All-time peak covers SteamRaw's recorded history.

Regional prices

All Steam store regions, converted to USD at today's exchange rate, compared with the US price. Lowest is the lowest price SteamRaw has recorded for that region.

Price history, US store (USD)

Branches

Depots

A build is one published version of the game's files on a branch. Steam assigns a new build ID every time the developer pushes an update, so this list is the update history of the app. The files inside a build (depot manifests) are only readable with an account that owns the game, which SteamRaw does not have yet, so build contents are not shown.

Every appinfo change SteamRaw has observed, grouped by changelist. Tags, features, languages, builds, depots, prices and any other key Steam publishes. Tracking since at least 12 September 2026 05:37 UTC (estimated from the earliest recorded change; the exact first fetch was not stored).

No changes recorded since SteamRaw first saw this app. Every future PICS change will be listed here.

No news for this app.

Full appinfo as delivered by Steam PICS, changenumber 38679122. Also at /api/app/4279040/raw.

{
  "appid": "4279040",
  "common": {
    "name": "Backrooms Lost Unit",
    "type": "Game",
    "clienticon": "a77df55f9f49d401a5dadd2c2d18dd19c4fd7f08",
    "icon": "a77df55f9f49d401a5dadd2c2d18dd19c4fd7f08",
    "oslist": "windows",
    "osarch": "",
    "osextended": "",
    "releasestate": "released",
    "controllertagwizard": "1",
    "small_capsule": {
      "english": "c3c67b628967ffd50f820528c823f1749b6e72f2/capsule_231x87.jpg"
    },
    "header_image": {
      "english": "d087501959a5f489e874904281c73998d291e06c/header.jpg"
    },
    "library_assets": {
      "library_capsule": "en",
      "library_hero": "en",
      "library_hero_blur": "en",
      "library_logo": "en",
      "library_header": "en",
      "logo_position": {
        "pinned_position": "BottomLeft",
        "width_pct": "49.302325581395365",
        "height_pct": "86.81068617243656"
      }
    },
    "library_assets_full": {
      "library_capsule": {
        "image": {
          "english": "0ddf1236030f5269bf0afb5bbcc118e73dc6cda0/library_capsule.jpg"
        },
        "image2x": {
          "english": "0ddf1236030f5269bf0afb5bbcc118e73dc6cda0/library_capsule_2x.jpg"
        }
      },
      "library_hero": {
        "image2x": {
          "english": "b00ebb0d69d397c90b5492315902e6b9409f0ff3/library_hero_2x.jpg"
        },
        "image": {
          "english": "b00ebb0d69d397c90b5492315902e6b9409f0ff3/library_hero.jpg"
        }
      },
      "library_hero_blur": {
        "image": {
          "english": "b00ebb0d69d397c90b5492315902e6b9409f0ff3/library_hero_blur.jpg"
        }
      },
      "library_logo": {
        "logo_position": {
          "pinned_position": "BottomLeft",
          "width_pct": "49.302325581395365",
          "height_pct": "86.81068617243656"
        },
        "image": {
          "english": "61eb5cce86555cdfa3815d4ee5c3edff40f146e0/logo.png"
        },
        "image2x": {
          "english": "61eb5cce86555cdfa3815d4ee5c3edff40f146e0/logo_2x.png"
        }
      },
      "library_header": {
        "image": {
          "english": "d087501959a5f489e874904281c73998d291e06c/library_header.jpg"
        },
        "image2x": {
          "english": "d087501959a5f489e874904281c73998d291e06c/library_header_2x.jpg"
        }
      }
    },
    "store_asset_mtime": "1784311634",
    "associations": {
      "0": {
        "type": "developer",
        "name": "JD Archives"
      },
      "1": {
        "type": "publisher",
        "name": "JD Archives"
      }
    },
    "primary_genre": "1",
    "genres": {
      "0": "1",
      "1": "4",
      "2": "70"
    },
    "category": {
      "category_2": "1",
      "category_1": "1",
      "category_9": "1",
      "category_38": "1",
      "category_22": "1",
      "category_67": "1",
      "category_68": "1",
      "category_70": "1",
      "category_82": "1",
      "category_64": "1",
      "category_62": "1"
    },
    "supported_languages": {
      "english": {
        "supported": "true",
        "full_audio": "true"
      },
      "spanish": {
        "supported": "true"
      },
      "brazilian": {
        "supported": "true"
      }
    },
    "steam_release_date": "1779367889",
    "community_visible_stats": "1",
    "community_hub_visible": "1",
    "gameid": "4279040",
    "store_tags": {
      "0": "3834",
      "1": "3839",
      "2": "4191",
      "3": "1667",
      "4": "1721",
      "5": "19",
      "6": "597",
      "7": "4175",
      "8": "4236",
      "9": "1702",
      "10": "4145",
      "11": "3978",
      "12": "1685",
      "13": "3859",
      "14": "3843",
      "15": "4182",
      "16": "493"
    },
    "review_score": "6",
    "review_percentage": "79"
  },
  "extended": {
    "developer": "JD Archives",
    "publisher": "JD Archives"
  },
  "config": {
    "installdir": "BackroomsLostUnitContent",
    "launch": {
      "0": {
        "executable": "BackroomsProject.exe"
      }
    }
  },
  "depots": {
    "228989": {
      "config": {
        "oslist": "windows"
      },
      "depotfromapp": "228980",
      "sharedinstall": "1"
    },
    "228990": {
      "config": {
        "oslist": "windows"
      },
      "depotfromapp": "228980",
      "sharedinstall": "1"
    },
    "4279041": {
      "config": {
        "oslist": "windows"
      },
      "manifests": {
        "public": {
          "gid": "6056620014417992601",
          "size": "9608641471",
          "download": "9227831888"
        }
      }
    },
    "baselanguages": "english",
    "branches": {
      "public": {
        "buildid": "25107227",
        "timeupdated": "1788457153",
        "timebuildupdated": "1788457109"
      }
    }
  },
  "ufs": {
    "quota": "100",
    "maxnumfiles": "1000",
    "savefiles": {
      "0": {
        "root": "WinAppDataLocal",
        "path": "Backrooms Lost Unit/Saved/SaveGames",
        "pattern": "*.sav",
        "recursive": "1"
      }
    }
  }
}