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Steam Proton games use window class steam_app_XXXXX. Steam installs icons as steam_icon_XXXXX. This maps between them so actual game icons display instead of generic controller fallback.
bbedward
approved these changes
Jan 10, 2026
Contributor
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@bbedward @shalevc1098 Could this be tweaked to still fallback to the controller? I'm not sure the exact reasons but it is not working for me. For non-steam games I get it but seems it does not work with some steam games either. Deadlock is a game in closed alpha atm though so not sure if that impacts it. Btw @bbedward as a sidenote to this, would it be possible to extend the "App ID Substitutions" to have an option to check window title? If running a game through gamescope for example app id comes back "Unknown" or null. Window title on the other hand is listed as "gamescope - Deadlock" or something similar I believe. |
Collaborator
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Check this for a fallback a823095 - open a new one for the window titles (just so it doesnt get lost) |
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steam proton games now show their actual game icons instead of the generic controller. maps steam_app_XXXXX window class to steam_icon_XXXXX which is what steam installs.