After installation, you need to swap the shortcut from the installer to the actual game executable.
If you added the installer directly through Steam, you've already done this. If you used a different method and haven't created a shortcut yet, you can manually add a game: how to install cracked games on steam deck
: Add the setup.exe as a non-Steam game and set compatibility to Proton Experimental . After installation, you need to swap the shortcut
Copy the installation folder or .exe file to a USB flash drive formatted to NTFS or exFAT. Plug the drive into your Steam Deck using a USB-C adapter. how to install cracked games on steam deck