GenlyAi: Gotcha. I understand now.
I'd consider then a feature request for GOG Galaxy 2.0.
Keep in mind also the fact that when you go to 'settings' -> 'features', they are kinda already considering 'running client' options, including, at the very least, closing other launchers once you quit their game. But that'd have to be done (as in run the game) through GOG, as far as I know of their programming. Not really what you're asking for, but at least a step in the right direction, in my opinion.
UK_John: Nice to have a "grown up" conversation when it comes to gaming. It seems to be happening less and less with many of today's gamers.
Thank you! I always try to understand all points of view! :)
That said, I can't exactly reproduce what you first posted, but I may need more info. So, I install a
GOG game through GOG Galaxy, close GOG Galaxy completely (even checking the 'task manager' - I'm on Windows - to make sure nothing Galax-y lingered on), I was still able to open the game ( as the .exe or link to it) without having it first opened GOG Galaxy. The games managed to run just fine on their own. If that was not your case, then then I'd consider that a bug and you could submit a 'report issue' listing the games where you had that problem.
The problem is (and perhaps will always have to be) games installed through GOG Galaxy, but if they come from
other platform/games other than GOG, like Steam or UPlay. Then, there's no magic GOG can do (for most games): a Uplay game, for example, would open Galaxy (if not already opened), then Uplay, then the game itself!