I downloaded Emudeck and I setup a couple of Wii U rom. I managed to find a rom of Wind Waker HD somewhere that work great in gaming mode but so far it’s the only one that works. The rest of my rom come from Wii U downloader. The rom crash when I try to open them in steam but they work fine in desktop mode. My friend seems to have the same issue and I would love if someone would help me.
If you have a PC I would suggest using USBhelper instead. All the games I downloaded from that works on steam deck but a few I downloaded from Wii U downloader would crash when starting them in game mode.
But USBHelper is only available on windows no?