"steam://subscriptioninstall/<SteamAppID>" is the command to install the game when it's not currently installed. Once this string is put into the launch field in Launchbox for given game, the blue "Install" button lights up above the description of the game in Launchbox.
So I guess I would have to add "steam://rungameid/<SteamAppID>" as an additional program associated with each uninstalled Steam game then for the Steam badge to show in Launchbox?
Once the game is installed, I would need to change this "steam://subscriptioninstall/<SteamAppID>" to "steam://rungameid/<SteamAppID>" so that it will instead show the "Play" button instead of "Install"?
See, I can't import all of my Steam games all at once using the wizard because I don't have a smartphone, which is required by Steam in order for me to get my Steam API key which Launchbox requires to import all games at once, so I have to import all 2500 games manually, so I am just trying to figure out what Launchbox does (in terms of the launch command parameters) in cases when it can import all games (installed and uninstalled) via the Wizard.
Thanks for any additional help.