# RetroArch \- ProSystem

Summer DB entity ID: d36a293f\-9b5c\-47ed\-befa\-85f2b02a0f38

Steam App ID: 1227481

The ProSystem emu is an A7800 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\. For libretro it has been rewritten in C and made more portable, along with some additional enhancements\.

## Game information

- Type: dlc

- Developer: Libretro, Greg Stanton, Brian Berlin, Leonis, Greg DeMent

- Publisher: Libretro

- Release date: Dec 2, 2021

- Coming soon: false

- Free to play: true

- Parent Steam app: 1118310

- Genres: Free To Play

- Categories: Single\-player, Multi\-player, PvP, Online PvP, Shared/Split Screen PvP, Co\-op, Online Co\-op, Shared/Split Screen Co\-op, Shared/Split Screen, Cross\-Platform Multiplayer, Downloadable Content, Full controller support, Remote Play on TV, Remote Play Together, Family Sharing

- Platforms: windows, mac, linux

- Website: Not collected

- Screenshots: https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/1227481/ss\_1704ebf8609fa72cb3129ddf654c54b54884f7ce\.1920x1080\.jpg?t=1677705058, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/1227481/ss\_89824efa71f50bdc859a729e9320c3b654e42951\.1920x1080\.jpg?t=1677705058, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/1227481/ss\_a5a67fd8975005f36d5ad6a8c5565e64065f7dce\.1920x1080\.jpg?t=1677705058

- Price: Not collected

- Price country: Not collected

## Observed metrics

- Current players: Not collected

- Steam review count: 21

- Steam positive reviews: 21

- Steam negative reviews: 0

- Steam positive percentage: 100%

- Summer DB rating: No native votes

Review filters: \{"language":"all","review\_type":"all","purchase\_type":"all","filter\_offtopic\_activity":0\}

## Player history

[Seven-day chart data as Markdown](/api/v1/entities/d36a293f-9b5c-47ed-befa-85f2b02a0f38/player-metrics?days=7&format=markdown) · [JSON](/api/v1/entities/d36a293f-9b5c-47ed-befa-85f2b02a0f38/player-metrics?days=7)

Chart values are hourly observed maxima. The sampled 24-hour peak and missing intervals carry explicit coverage; history before collection is unknown.

## Sources and freshness

- Catalog membership: store\_catalog

- Catalog observed: 2026\-09\-28T16:58:32\.455488\+00:00

- Details observed: 2026\-09\-24T17:51:12\.93597\+00:00

- Player count observed: Not collected

- Reviews observed: 2026\-09\-24T17:51:13\.977647\+00:00

Full provenance: \{"urls":\{"price":null,"catalog":"https://api\.steampowered\.com/IStoreService/GetAppList/v1/","details":"https://store\.steampowered\.com/app/1227481/","players":null,"reviews":"https://store\.steampowered\.com/appreviews/1227481"\},"price":null,"source":"steam","catalog":"2026\-09\-28T16:58:32\.455488\+00:00","country":"US","details":"2026\-09\-24T17:51:12\.93597\+00:00","players":null,"reviews":"2026\-09\-24T17:51:13\.977647\+00:00","language":"en","editorial":null,"membership":"store\_catalog","observations":\{"price":null,"catalog":"b17f8e1d\-f3b0\-4822\-ad9e\-cfcf6bb44df4","details":"d407a052\-4919\-414c\-8b39\-aa254f4f4368","players":null,"reviews":"6d4a32da\-7286\-4721\-8fd7\-2a40b95eb598"\},"reviewFilters":\{"language":"all","review\_type":"all","purchase\_type":"all","filter\_offtopic\_activity":0\}\}

Native rating methodology: \{"count":0,"average":null,"entityId":"d36a293f\-9b5c\-47ed\-befa\-85f2b02a0f38","revision":0,"observedAt":null,"methodology":"arithmetic\-v1","distribution":\[0,0,0,0,0,0,0,0,0,0\]\}

Steam reviews are not Summer DB votes. Missing data is not zero. Player counts are observations, not historical peaks. A supplemental record does not establish that a game was delisted.

[Steam store](https://store.steampowered.com/app/1227481/) · [JSON](/api/v1/games/d36a293f-9b5c-47ed-befa-85f2b02a0f38)