How are people keeping their offline backups up to date?

Currently every time I purchase a game I download the offline installers and store them someplace safe. I've noticed a lot of games have patches as well. Problem is, unless I go and manually download every game again, how am I to know what games have received a patch or had new offline installers uploaded?

So I'm curious to know how people maintain their offline backups.

Usually when I finish play a game, and if I really liked it, I download the offline installer to keep. So although my library is about 400 games, I only have about 50 or so downloaded and stored. Most of those games are completed so they don't receive any patches again so there isn't anything to update. That means I usually have about 10 games a year or so to update and I delete the old installer and redownload the new installer. It's a bit cumbersome and I wish Galaxy had a feature to keep offline installers automatically updated, but I usually don't mind doing it manually. I can see it being a problem if I was maintaining my entire library offline though.

Do what most others do, follow this thread religiously: https://www.gog.com/forum/general/the_what_did_just_update_thread

https://www.gog.com/forum/general/gogrepopy_python_script_for_regularly_backing_up_your_purchased_gog_collection_for_full_offline_e

I was keeping a copy of my favorite games, but that took a lot of space.

I settled for only backing up games that update frequently and the version matters for certain mods (I have every version of Stellaris, Sins of a Solar Empire was not equal to the steam version at one point and you needed the old version for mods, ect)

Its only actually a couple of games from my library that I need to keep all versions for. I just check my library every so often, check the updated filter and look for those specific games, or just search my library for each of those and check if they had anything released.

At some point I will get an external HD large enough for my entire library and use the python script on the forums to back the entire thing up. The script checks for and downloads updates to stuff you already have

Ive seen this mentioned before https://github.com/eddie3/gogrepo and then there was a link on these forums for the python link if you search for it. I havent used these myself yet, but others said they have

I go into the webpage once in a while and check with the blue dot what is updated and then download either the patch, or the full installers depending on a number of factors. In most cases there is no urgency in keeping up to date, so don’t fret it. They want to give you the need to fret it of course as then your ore likely to buy into their client ecosphere, but don’t fall for it. Also, there is no way of downloading specific versions, so getting the latest one is not always best.

I miss the downloader already.
I used DownthemAll to queue my downloads, but somehow it's not the same.

I've adopted the "If it ain't broke, don't fix it" approach. Some updates are a good idea, eg, The Swapper works fine in W7 but had a "stuck cursor" bug in W10 for which a patch fixed. Many others though are just unwanted stuff like cloud saves added into offline DOSBox installers or the infamous "updated internal installer structure, no changes to game files" non-update updates, which half the time seems to be just GOG swapping out whatever adverts are shown by installers during installation for different ones, but just ends up creating artificial 'make-work' for both GOG and those maintaining offline archives.

gogrepoc.py does it automatically, and also moves away obsolete old files that you don't need anymore (it doesn't delete them but moves them to another location so you can check them if you want to keep any of the old files for any reason; e.g. I've kept some soundtracks that GOG removed from a couple of games' goodies, and also the CD and DVD versions of Myst 2: Riven).

Great tool for those who want to keep a local archive of their GOG game installers and goodies. Setting it up takes some effort (and careful reading of installation instructions) and learning the few commands that you need to use with it, but after that, it is smooth sailing.

I think you should use the dev branch of Kalanyr's gogrepo (gogrepoc) as the main hasn't apparently been updated for two years.

https://github.com/Kalanyr/gogrepoc/tree/dev

lgogdownloader https://www.gog.com/forum/general/lgogdownloader_gogdownloader_for_linux