This is probably old news to the veterans around here, but you should know when a game is removed from the store, it disappears from your wishlist without notice.

Today my wishlist count inexplicably decreased by one. Thankfully, I also keep a local wishlist. That's how I know the item in question was Dead Cells: The Fatal Seed Bundle which was yanked off the store after the release of Dead Cells: Road to the Sea.

It’d honestly surprise me more, if games removed from sale where still listed in my wishlist.

I went through an even more interesting experience a few years ago... I had added a game to my shopping cart and was waiting for a money transfer to complete to buy it, but it actually wasn't processed that day so I forgot about the whole thing for a few days. When I finally logged back in the game had been delisted... and also removed from my cart :P.

Not entirely surprising. I can't see how something that doesn't have a page on the store any more could remain in your wishlist. As for being notified... well that would require GOG to actually do something. That's not really their style. :P

The funny things is that it actually remains in your wishlist (you can see the IDs in your wishlist.json) it just doesn't display it in the store. If something goes missing, you can use that to track down what was it on GOGDB.

There should definitely be a notification in that case as well. Though I don't count on anything still being in the shopping cart after closing the browser or putting the computer to sleep, etc. Links for those who don't know what we're talking about:
wishlist.json
GOGDB

Thank you. That's both helpful and interesting. Also frustrating, since it would be even easier than I thought to display a note that the item isn't available anymore. I might be able to do it myself, but I don't allow add-ons to run on the site for security reasons.
I'm seeing +3 items in the JSON versus the site, so that's 2 items that are unaccounted for. I'll try to find a less tedious way to look them up, since I can't just copy and paste each product ID.

Actually, it's a bit more interesting than that. The item has not really been removed from your wishlist (as it is stored on GOG's servers) --- it's just not displayed on screen because GOG does not display items that are not in its catalogue. In essence, it is now a hidden (and therefore undeletable) wishlist entry. If one day the item returns to GOG (unlikely for this item, but possible for other removed items), it will magically reappear on your wishlist without your needing to readd it.

From time to time, GOG has rare glitches that make it display these hidden wishlist entries on screen. Last time I saw it was, IIRC, on the first day of the Winter Sale.

What happened to me is that the wishlist counter is stuck at +1 from the actual number, since the botched release of the SpellForce 3 Reforced. The ID for the Legacy edition is still there, GOG failing to delete it when I bought the Reforced edition, and with no way for me to delete it now.

Edit: I looked through the wishlist.json and the good news is that the ID for SpellForce 3 Legacy is not there. The bad news is that the ID 1084714317 for SpellForce 3 Reforced (Package) is there. Oh well, just another one of the GOG's never-ending screwups.

Which is a good call, I wouldn't run anything that wasn't written by myself on a site where money is involved. What you can do to make things easier is collect the IDs that actually show up on your wishlist from its API endpoint and cross-check it against the IDs from the wishlist.json. Pagination might be annoying, but if you have less than 101 items on your wishlist, it probably could be done from a bookmarklet. Which I'm probably gonna do now to figure out what's that extra item on my list...

Yes, thank you. soosgjr pointed that out in post 5.
The hidden items can probably be removed from the wishlist by someone who knows enough JavaScript, but for me it's not worth the bother. Thank you, but parsing that is a bit more than I can do. It's okay though. I figured out what the other two items were:
Dead Cells: The Bad Seed Bundle which was replaced by the aforementioned Dead Cells: The Fatal Seed Bundle.
Syberia: The World Before which is still available, but now has a different product ID for whatever reason.

If I had gotten a dime each time something like this happened, Jeff Bezos wouldn't be the only dragon of the modern world :P.

저기 posted the solution in another thread. You simply go to a link that looks like this:

https://www.gog.com/user/wishlist/remove/1127255658

Again, you can look up products and their IDs on GOGdb.