Without them, the Xemu emulator won't detect the games and they'll refuse to run. You will need to obtain the BIOS files from your Xbox, but the file names you will need and the root file ...

Here's what the process entails. After you place the Xbox 360 and XBLA ROMS into their folders, you'll want them to appear on the Steam Deck's library in Gaming Mode. If it's closed, reopen the ...