Start launchbox auto-opening a specific rom and add the executable in Steam

[American horizon]

I tried everything without success.

My idea Is to create a Steam collection with all games of a saga. Since some old games are managed by launchbox, i want to add in Steam a "non-Steam game" that starts launchbox along with a specific rom.

I'm under Windows, not Steam deck.

[JoeViking245]

LaunchBox does not have any available command-line parameters when starting it.

But you should be able to deduce the parameters needed to launch a game by combining

• the full emulators application path
• the command-line parameters (if any) 
  • or overrides under Associated Platforms
• the full path to the ROM file (depending on checkboxes checked in the emulator settings)

[American horizon]

2 hours ago, JoeViking245 said:

LaunchBox does not have any available command-line parameters when starting it.

But you should be able to deduce the parameters needed to launch a game by combining

• the full emulators application path
• the command-line parameters (if any) 
  • or overrides under Associated Platforms
• the full path to the ROM file (depending on checkboxes checked in the emulator settings)

Yes It s a possibility, but this will launch directly the emulator + rom bypassing launchbox, and i don t want this

Edited 5 hours ago by American horizon