I backup all of my owned GOG games and some games DRM-free on other stores in a 2TB external HDD.

I don't own a modern AAA game that takes over 100GB of storage like Cyberpunk 2077 or Baldur's Gate 3 on GOG yet though.

There's currently 6720 games currently sold on GOG, and 199 more if you count delisted games. I wonder how many terabytes it would take to backup all 6919 GOG games...

Of course I back up all my games. I'm not a psychopath...

Yeah, I have almost 2,000 GOG games backed up on a 8TB and a 6TB external hard drive. It's not that bad because I have updated games downloaded onto my 4TB hard drive in my PC, which I back up once a month to externals.

Backing up is not the hard part. It's having enough space for games. Most modern games are ridiculously big. Shadow of War is like 100GB.

Now this guy's a gamer.

I back up all games I may intend to play in the future, so except those I completed (since I don't replay games) or have definitely made up my mind to abandon for good and the freebies grabbed back when I was just grabbing everything given away and which I have no interest in.

Not really, merely a video games player ;)
(this "gamer" label has too much bad connotation for me to accept wearing it)

I don’t even play games that much, but I work on a software revolving around video games. So the more I have access to, the better said software can get.

I back up all of them. I've stopped making backups of steam games because they're useless without the steam client.

All. Using gogrepoc as others have mentioned, but also manual backups of some things (older version of Saints Row, LBA and LBA 2 etc).

And why? Because of that stupid stunt GoG pulled back in <whatever year it was> when they pretended to have shut down. Now I do it because of the eroding of ownership, but it started because of them being absolutely stupid.

ETA: I also take manual backups of games I've bought from Epic that are DRM free, e.g. Horizon Forbidden West. At some point I should probably do the same for games I bought on Steam too, where possible.

I back everything up. That's the whole point of the store. Using GOG and not backing your games up is the same 'awkward thing in the middle' as buying unencrypted MP3 albums from BandCamp, then just listening to them via a browser only online & logged in whilst refusing to ever download the .mp3 files. Why would you ever do that vs either downloading them to keep (the whole point of the site) or using Spotify like everyone else (the whole point of the other site?...)

I back up everything that I'd be even slightly sad about if it vanished with the store, even if I'm unlikely to ever touch it again, simply for preservation sake. Which does cover the majority of my games.

Definitely a few outliers though, like some garbage freebies and those few games I truly regret buying. Looking at you Overclocked.

I don't backup what I'm not interested, like some games GOG gave away at some point. The completionist on me made me claim them...

As for storage, nothing fancy. A few hard drives that got replaced by SSD's (mainly laptop).

Currently, I back up every Windows Installer and all Bonus Content/Extras for every full game I have. The only thing I do not back up are demos or prologues. Ideally, once I buy more hard drives and have more space, I’d like to back up all Mac and Linux installers too, but right now it’s only Windows versions.

I don't know how GOG is doing in terms of stability right now but their internal moves have me worried. I'm going to make sure I at least keep my favourites.

I think someone else made a similar comment but you're right. Without backing up the installers then there's not much difference from other services.

Wasn't that a April fools joke? I thought it was pretty funny actually.

No, it was their launch stunt, in 2010, when they left beta. https://www.pcgamer.com/gog-com-apologise-for-hoax-closure
Here we go, actual GOG article: https://web.archive.org/web/20100925190120/gog.com/en/news/welcome_to_the_brand_new_gog_com/0