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Steam ROM Manager
One of the final steps in the EmuDeck emulator setup process is to preconfigure and run Steam ROM Manager (SRM). This is a graphical application that has been at the core of adding emulated and homebrew games to a Steam library for a few years, and it does something that isn't feasible manually. It creates game entries in Steam for an individual emulated title, a game from another game store, a homebrew game, or any other executable you wish to add to Steam. It augments these entries with graphics, bevels, and anything else it can find via a parser that will scan the Internet for matching assets. It's brilliant for those of us who want our non-Steam games and Steam games to look the same when browsed in Steam, and Steam ROM Manager does this as a batch process, rather than having to add (or remove) every entry one by one. Doing the same thing manually requires remembering exactly where each asset can be uploaded, sometimes from the box view, sometimes from the banner view, and sometimes from the game properties menu. SRM does away with all this and works brilliantly with the Steam Deck, but it also works just as well in the desktop Steam library view, or Big Picture Mode when you're browsing Steam on a TV.
The only downside is configuring your games, and this can take some time even outside of the Steam client. The native installed approach involves creating a parser for each emulator you wish to use, and you can detail things such as the command-line arguments, the Steam category to use, and where assets might be downloaded from. You can often find example parsers online, and EmuDeck (see above) includes a huge list that will work with RetroArch's various cores. With the parsers added, you then scan your games collection and SRM will automatically grab and organize what it can. If you like the preview of what it finds, you can add them all to Steam with a single click. If not, you can easily change any titles you don't like or modify those that might have been wrongly detected. Assets include banners, posters, and other images associated with the titles you have, and you can freely configure how those assets are searched for and where they come from.
Project Website
https://github.com/SteamGridDB/steam-rom-manager
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