Rotten Flesh is a cosmic horror survival game where you have just lost your dog named Roy and you have to find him by shouting for "ROY" on your microphone. Venture deep into the sewers where your dog was lost - however, something else can also hear your screams in the tunnels.
Valve is still working on adding support for this game on Steam Deck
SteamOS:
This game runs successfully on SteamOS
Note: Some functionality is not accessible when using the default controller configuration, requiring use of the touchscreen or virtual keyboard, or a community configuration
Note: This game does not default to external Bluetooth/USB controllers on SteamOS, and may require manually switching the active controller via the Quick Access Menu