That is how you handle a delisting. Thanks for giving us the opportunity to purchase these for an extended period at a discounted price.

It seems they went under new management a year ago, which might have something to do with it:
https://www.gamesindustry.biz/supercom-rebrands-to-super-good-games

Thank you for the early heads-up and for the goodbye-discount!

Why are they being delisted?

Thanks for the sale though, I've bought all of them, especially since they have achievements.

Thank you for the information and the discount! I bought all four games. :)

Yes, thank you for the early warning and giving us a last chance offer. One of the games is actually on my wishlist.
I'm always sad and disappointed when games vanish from the catalog overnight and without notice. But not this time!

Had Raji on my wishlist, thanks for the heads-up & discount

This, absolutely this.

If I had to guess, then it's because it's no longer economical to support them here due to the lack of sales, as much as it sucks to hear. E.g. Raiji has 12 reviews on gog, while ~1650 on steam. We can extrapolate sales out of that ratio. Worth to keep in mind that these games will become unsupported here, so no more updates/patches either.

Thanks to GOG and the studio for applying discounts on the games.

Why? At who's request? Chances they're returning?

I've purchased these and it sucks to see more games that won't get updates ever again.

Support what? I had the alchemist for a while and it wasn't getting any new patches. Having a game at the end of its life cycle couldn't be easier. It's just passive income at that point. It's a lot more likely that their new owner loves DRM.

Support as in general terms maintaining the gog version of game, ensuring that it runs fine on win11 and its further versions, etc. Fixing bugs, compatibility issues and so forth. If something breaks, then the dev won't fix it as the game is unsupported after being delisted.

If it is about a new owner though, it might be just a matter of time and some paperwork to have them back, esp. if it is a passive income at this stage as you say and it's viable for them to re-publish them here. I mean they likely have all the data needed to decide for themselves.

Agreed!

@GOG: Still, it would be of interest, to know what are the reasons for delisting their games. Did they request to do so? Is it GOGs decision out of business reasons?

And, in general, what are the reasons for delisting games and even more so a entire portfolio of a dev/publisher?

I don't think they've been doing that on any platform for a while.

Hopefully, but they wouldn't be the only studio to go from supporting GOG to embracing Denuvo for newer releases, if that's what's going on here.