kohlrak: I've been told by a dev that it's more than just that. They actually have a process for rejection due to bugs, too. So, i'm guessing there is actually playtesting to some degree, but i'm not sure how involved it is.
So, what exactly did that dev tell you, what steps are there exactly? Or was he just that vague? And how fresh was his experience with GOG anyway, was it e.g. from years ago?
Elsewhere it has been said that GOG has a process in place where a developer can upload updates to the Galaxy version on their own. Whether that is available only for selected developers at the moment, I don't know. The playtesting you mention is most probably related to only classic GOG games where GOG does part of the "development" (ie. making it run on modern systems). I have hard time believing GOG staff would make similar playtesting to e.g. in-dev indie games, like Startup Company.
I'd really like to hear some concrete examples, not just vague whining from some developers. What exactly is GOG expecting the developer to do, why so many other developers don't seem to have similar problems but constantly release updates on the GOG versions, etc.?
The most concrete complaint I remember hearing here on the forum (quote from some developer) has been that GOG was slow responding to their messages. That naturally is something that GOG should fix then, if it was the real problem an update didn't appear on GOG.
Anyway, let's hope that some tangible confirmation is received about this (e.g. a tweet by the developer where he says that), so that game can be included in this list:
https://www.gog.com/mix/games_that_treat_gog_customers_as_second_class_citizens I always check that list when I am thinking of buying some new-ish game on GOG. Luckily that list doesn't change that often so I almost remember all the games in it by heart, and it is not like I care for all the "issues" either (like the GOG version not having German or Linux support, or missing multiplayer, is usually not an issue for me).