Butler docs state this:

• game_id: (numeric) identifier of the game (find it in Edit game)

But I havent been able to locate any such ID in my game edit settings.

Hey there,

I noticed in the edit game screen, the URL is something like:

itch.io/game/edit/<number>

Could it be that “<number>” is the game_id you are looking for ? I haven’t tested it myself, but worth a try.