Thanks
Klumpen0815 for the list.
I think there has been a lot of misunderstanding here and it's sensible to an extent.
The problem is not that GOG is dropping Windows XP support as a customer service, which is sensible and acceptable. What they have done in New Vegas and since their Galaxy wrappers are not XP compatible they will do again is making games that originally have tested and work on XP useless on their original target system.
Galaxy is meant to be optional(???), which doesn't fit with all this. We don't write about executables, which need patching to make them playable to newer Windows versions, but for an unnecessary, not originally related to the games dependency.
Klumpen0815's list shows just that. The games run on XP by default.
A few more things I'd like to note.
All users who have followed the Windows upgrades until now are not affected. On the other hand, consider how secure is the option to support GOG on breaking working software for external (optional?) dependencies (Vista EOL is imminent and 7 will come in 2020).
I think that users have their own reasons to upgrade or not their Windows systems. It's out of question and a totally different subject than the one in this thread. There could be some reasons spreading from just ethical to lack of hardware and software support to even financial.
Also not all games run (at an acceptable performance level or at all) on Wine and it's a different subject too.
Finally, there is no need to have access to source code in order to make changes or inject dependencies to an executable.
Hint: Malware may alter many things on Windows without source code access.
In this specific case we have dll injection. Interested users may find more on this and references about it
here.
Excuse me for the long post.