Prosystem

The ProSystem emu is an A7800 emulator for the PC. The emulator was (originally) written in C++ using the Windows API and DirectX. It runs the ANTSC and PAL TV standards. It was originally written by Greg Stanton and then updated by others.

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

No player history yet. Player counts are collected throughout the hour; the chart appears after a successful sample.

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 06:56 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 38660975. Also at /api/app/1227481/raw.

{
  "appid": "1227481",
  "common": {
    "name": "Prosystem",
    "type": "DLC",
    "parent": "1118310",
    "releasestate": "released",
    "oslist": "windows,macos,linux",
    "osarch": "",
    "osextended": "",
    "controller_support": "full",
    "small_capsule": {
      "english": "capsule_231x87.jpg"
    },
    "header_image": {
      "english": "header.jpg"
    },
    "store_screenshot": "ss_1704ebf8609fa72cb3129ddf654c54b54884f7ce.jpg",
    "store_asset_mtime": "1638307802",
    "associations": {
      "0": {
        "type": "developer",
        "name": "Libretro"
      },
      "1": {
        "type": "developer",
        "name": "Greg Stanton"
      },
      "2": {
        "type": "developer",
        "name": "Brian Berlin"
      },
      "3": {
        "type": "developer",
        "name": "Leonis"
      },
      "4": {
        "type": "developer",
        "name": "Greg DeMent"
      },
      "5": {
        "type": "publisher",
        "name": "Libretro"
      }
    },
    "primary_genre": "37",
    "genres": {
      "0": "37"
    },
    "category": {
      "category_28": "1",
      "category_43": "1",
      "category_44": "1",
      "category_2": "1",
      "category_1": "1",
      "category_49": "1",
      "category_36": "1",
      "category_37": "1",
      "category_9": "1",
      "category_38": "1",
      "category_39": "1",
      "category_24": "1",
      "category_27": "1"
    },
    "supported_languages": {
      "english": {
        "supported": "true"
      },
      "french": {
        "supported": "true"
      },
      "italian": {
        "supported": "true"
      },
      "german": {
        "supported": "true"
      },
      "spanish": {
        "supported": "true"
      },
      "dutch": {
        "supported": "true"
      },
      "greek": {
        "supported": "true"
      },
      "japanese": {
        "supported": "true"
      },
      "koreana": {
        "supported": "true"
      },
      "norwegian": {
        "supported": "true"
      },
      "polish": {
        "supported": "true"
      },
      "portuguese": {
        "supported": "true"
      },
      "brazilian": {
        "supported": "true"
      },
      "russian": {
        "supported": "true"
      },
      "latam": {
        "supported": "true"
      },
      "swedish": {
        "supported": "true"
      },
      "turkish": {
        "supported": "true"
      },
      "vietnamese": {
        "supported": "true"
      },
      "schinese": {
        "supported": "true"
      },
      "tchinese": {
        "supported": "true"
      }
    },
    "steam_release_date": "1638445468",
    "gameid": "1227481",
    "store_tags": {
      "0": "113"
    },
    "review_score": "7",
    "review_percentage": "100"
  },
  "extended": {
    "dlcforappid": "1118310",
    "mustownapptopurchase": "1118310",
    "optionaldlc": "1",
    "developer": "Libretro",
    "publisher": "Libretro",
    "homepage": "https://www.retroarch.com",
    "isfreeapp": "1",
    "dlcavailableonstore": "1"
  },
  "depots": {
    "1227481": {
      "config": {
        "oslist": "windows",
        "optionaldlc": "1227481"
      },
      "dlcappid": "1227481",
      "manifests": {
        "public": {
          "gid": "6999322955619853607",
          "size": "261515",
          "download": "96704"
        },
        "nightly": {
          "gid": "6452858890605045451",
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          "download": "97696"
        }
      }
    },
    "1789820": {
      "config": {
        "oslist": "linux",
        "optionaldlc": "1227481"
      },
      "manifests": {
        "public": {
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          "size": "193555",
          "download": "51056"
        },
        "nightly": {
          "gid": "2489079512402111894",
          "size": "208563",
          "download": "61856"
        }
      },
      "dlcappid": "1227481"
    },
    "1789821": {
      "config": {
        "oslist": "macos",
        "optionaldlc": "1227481"
      },
      "manifests": {
        "public": {
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        "nightly": {
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          "download": "121952"
        }
      },
      "dlcappid": "1227481"
    },
    "branches": {
      "public": {
        "buildid": "20833956",
        "timeupdated": "1763418579",
        "timebuildupdated": "1763416732"
      },
      "nightly": {
        "buildid": "25163346",
        "description": "Nightly unstable builds",
        "timeupdated": "1788769557",
        "timebuildupdated": "1788769557"
      }
    },
    "privatebranches": "1",
    "appmanagesdlc": "1"
  }
}