This is probably redundant, but is there a clean way to permanently remove games from a GOG account?

I know I'm going to get questions, the main reason is I'm sick of seeing updates for the games in my account which I bought cheap on impulse and want to get rid of.

Supposedly, the only way is to get the entire purchase revoked (not refunded) which removes all games in said purchase.

Would setting the game to hidden prevent you from seeing the updates?

Nope, doesn't change that.

I have heard of people having specific games removed from their account by request (no refund, just gone forever). Are you saying to contacted customer support and they said the only thing they can do is cancel entire orders? I guess they must have changed policy at some point.

Yep, that's what they said. Not sure why they can't delete specific games.

My guess is that they just don't want to do that anymore. Because I had games removed from a larger order... but around two / three years ago they stopped doing that.

It's kind of silly that customers of the store are not allowed to do this manually.

Probably risk management, like someone else logging into your account and then removing (all) your games from the account for shits and giggles, and then the real owner (you) comes complaining to GOG that they should re-add all the lost purchases.

And then GOG figures gee do we really have to contact all the game publishers to tell that that this happened and GOG needs to give new licenses to games without paying the publisher (again) and blaa blaa blaa. And then some publisher is like hold on what are you doing GOG? Are you giving freebies of our games? And then GOG is like no that guy said he already purchased them earlier and then the publisher is like prove it and then GOG is like fuck it this is such a mess.

If I was Mr GOG, I would also make it hard or even impossible to remove games from an account, as there really aren't any valid reasons to remove games from an account, especially as there is the Hide option. Maybe there should be a button to clear the update flags if that disturbs some people so much. I mainly just don't care about the update flags, I don't actively follow them or anything. No, it would be totally silly to allow them to do that.

Why would it be silly for the customers to have complete control over their own library and purchases? This option is available at Steam by the way.

I agree really, there's no real reason to remove a game from someone's account. What they should do is improve the hide function so that hidden games are completely invisible unless you go to a specific page separate from the library.

I understand why they don't give the user the option to delete games. My question is why they (support) can't when you contact them. They say they can only cancel whole purchases. If they can do one, why not the other?

For instance because customers aren't always the only people in control over their account? Or because people are idiots and do stuff that they regret later? The benefits of removing games from accounts are next to none and not having to deal with customers who want their games back for one reason or another is a pretty solid argument for GOG not to allow the removal of games in the first place.
Maybe it's about book keeping or legal issues, it might even be technical reasons. The fact that the restrictions are so specific and tied to purchases suggests that there's a pretty serious reason for why they are doing it this way.

This whole thing started a few years ago when GOG attempted (and succeeded) to break bundles down into individual games. The result was that those who'd bought or been given the Lesuire Suit Larry games suddenly also had an item in their library for "softcore porn adventure". Many people complained about this, I can only assume it was because they considered themselves hardcore porn enthusiasts and felt devalued by it. Regardless, it exposed a problem in GOGs library logic, that the games are not directly linked to the items, only to the bundle that was purchased. I suspect it is for this reason they cannot remove individual items. Many complaints later, I think they removed that game from the bundle, but am not sure.

tl;dr; GOG has had buggy logic here for ages and aren't changing it.

Ah, OK.

I'm not a software expert by any means, is this something they could change easily? Or is it a complicated, expensive process?

Actually, I think you're conflating two things here. There was the Great Unbundling, which happened quite a few years ago (before the launch of Galaxy, around the time they got rid of the nice shelves), then much later there was the Softporn Adventure incident where if I remember correctly Softporn Adventure was changed from being an extra to a standalone game. So the original unbundling probably converted the LSL pack into individual LSL games, but with SpA as a bonus extra along with the wallpapers and what-have-you.

EDIT: It seems the Great Unbundling did add SpA to everyone's libraries. The later incident I remember is actually where SpA kept magically disappearing from everyone's libraries. GOG's half-arsed fix seemed to involve generating a new order to add SpA to people's libraries, causing it to appear at the top when sorted by "most recent". Needless to say, some people weren't happy about it suddenly floating to the top of their libraries.