I'm curious about the same. Since I store all my games under C:\Games (and with a 2TB SSD I have a lot installed at once), I've just mass searched for and batch deleted all the goggame*.* files in every folder completely (including .info .script and .hashdb) in my whole collection along with webcache.zip, some of the gog.log or goggame-galaxyFileList.ini), and then just retested games that come with DLC / expansion packs from the old Baldur's Gate 2, Neverwinter Nights & Unreal Gold through to newer ones like Dragon Age Origins, Dishonored & The Talos Principle, and everything including all the DLC / expansion packs works fine here?

Perhaps it is only that "bonus content DLC" that actually requires the use of Galaxy to acquire as those files are definitely Galaxy metadata files rather than "internal" to the game. Proof of which is if you have pre-Galaxy older installer versions laying around, those goggame*.* files aren't there are all for older games of exactly the same build version that haven't been updated by the developers in years. The only difference is what GOG have added for the sake of Galaxy metadata.

Unfortunately it isn't. Believe it or not some GOG releases of games are actually the Steam version that continues to call the steam_api.dll "internally" to the game but only functions without a client because GOG have provided a "wrapper" or dummy steam .dll (which ironically is not that far off how some Steam emulators / cracks work). Some games here like Hammerwatch or Unmechanical will definitely crash if you delete those steam_api.dll files. See attached gog_steam.jpg error message when you move / delete the included steam .dll files (that's the GOG version of Unmechanical). Yeah, I know...

Unfortunate, but I guess I could just trial and error when it comes to deleting all these extra files. Man, the things I do for DRM-free and a clean directory...

The examples I have in mind are Linux builds, so in these cases said files are not expected to interact with Galaxy in any way.

What I wrote is not « DLC refuses to start if you delete a goggame.info file », but « DLC is included in the base game, and unlocked by the presence of a goggame.info file ».

This got me re-trying Deus Ex MD as last time I tried to create a portable version I couldn't get the DLCs to work properly. Sure enough adding the .info file from the Season Pass got the game picking them up and working with them all.

It never would of occurred to me that it needs the .info file, so thanks.

I could also just make it a point to not play any games that require them. Like I know some devs are lazy or just for compatibility's sake will keep all the platform .dlls in the game directory, but as long as they're not required for the game to run or any content to be unlocked, I'm fine with it just being present.

I'd like to know if it's possible to change the icon Windows displays in the taskbar for a game that is running to be the original and not the custom GOG icon.