Just checked the library page for updates, and I saw that Roller Coaster Tycoon and Roller Coaster Tycoon 2 were "updated" recently.
Was this just an installer change, or were there additional compatibility patches applied, or some other change?
Just curious as to whether I should re-download them, or if it does not matter.

Here's a summary.

Ah, thanks for the quick reply!
Since these installers are the "classic" (non-Galaxy) installers, I would propose that the change (and larger file size) may be from changes or additions in the "suggested" (advertised) games during installation.
Nothing but a guess, though that's what I (vaguely) remember happening the last time I saw this type of installer update happen.
Again, thank you for the quick reply.

Yeah, it's a bit of a mystery, but since none of these games have changelogs, it's probably installer maintenance.

~200 MB "installer maintenance"
I'm quite curious as that's a hell of a bump in file size.

I have both games installed through Galaxy and basically just files for Galaxy. These are the detailed changes:

RCT1

New files:

gog.ico
goggame-1207658945.hashdb
goggame-1207658945.script
unins000.ini

Changed files:

goggame-1207658945.info
goggame-galaxyFileList.ini
goglog.ini
Launch RollerCoaster Tycoon Deluxe.lnk
unins000.dat
unins000.exe

RCT2

New files:

goggame-1207658957.hashdb
goggame-1207658957.script

Changed files:

goggame-1207658957.dll
goggame-1207658957.info
goggame-galaxyFileList.ini
goglog.ini
Launch RollerCoaster Tycoon 2 Triple Thrill Pack.lnk
unins001.dat
unins001.exe
unins001.ini
unins001.msg
webcache.zip

Also the differences between 27143942 and gog-9:

Changed files:

GameuxInstallHelper.dll
goggame-1207658957.dll
goggame-1207658957.info
goggame-galaxyFileList.ini
goglog.ini
Launch RollerCoaster Tycoon 2 Triple Thrill Pack.lnk
Support.ico
unins001.dat
unins001.exe
unins001.msg
webcache.zip