I have used GoG for over a decade but something that bothers me is that I cannot easily locate or search for genres of games. The current example is match-3. I want to play a new match-3 type game. So, off to GoG I go to find a list of the match-3 games they have and here is where the wheels fall off and the vehicle explodes.

Why?

GoG wants to sell games, they are business. So why are they making it impossible to get a list of games for a genre? I have money I want to spend. Here, take my money! Or, don't. I will just go to another website that actually offers to list what they have.

At one point GoG had tags but that appears to have either been entirely removed or hidden to the point of functionally being removed.

They still have them, but each game can have only three of them, and sometimes they have been chosen very randomly.

I don't think they have ever had very detailed genre descriptions for casual games though. Your best option is to look under puzzles:

http://www.gog.com/games?search=Puzzle

One workaround possibility is to do a Google search restricted to "site:gog.com/game" with the keyword you are looking for.

For match-3, some games I am aware of on GOG are:

Battle Chef Brigade

Card City Nights ("combines match 3 mechanics with traditional cardplay" according to a review)

HuniePop

HuniePop 2

The World Next Door.

Outside of GOG, casual game publishers have a lot of match-3 titles. For example Big Fish has a large list of match-3 games. There have been some recent free game codes posted here in the deals threads if you want to try those out.

Weird, I wouldn't say it plays like a match-3 at all.

If you're talking about a "user tag cloud"-type of thing, then no. They've never had such a thing since I've been here, and I've neither heard about this from any "old-timers" before now, nor seen evidence of it. AFAICT, it's always just been their bizarrely limiting three genre tags per game.

With regard to match-3 games -- there just aren't very many here. Aside from those already mentioned in this thread, I know of Triple Town...and that's about it. (I mean, there might be two or three more that we've all forgotten about, but you get my point.) There are some other kind of similar puzzly games, like Super Puzzle Platformer Deluxe, but I think the number of titles on GOG that are in that ballpark is still pretty small.

I don't advise buying "HuniePop" as it is literally unplayable, because after a few hours into the game, you have to do real-time "bedroom puzzles" in which the game doesn't give you enough time to even look at the screen, to see which pieces are where, before the few seconds that the game gives you to complete a move successfully had already expired.

I suggest using Mobygames instead of GOG's internal listing, often the genre listing is...slightly insane.

Thank you very much. I will go through the puzzle listing. Thank you for the suggestions. I will check them out and see if they will be something to buy.

And sometimes they're outright wrong. For example, Elminage Gothic has the Action tag and it is in no way an action game of any sort. In fact, it should have the turn-based tag. (Wizardry: Labyrinth of Lost Souls, which is a very similar game, at least doesn't have the action tag, but it should have the turn-based tag and it doesn't.)

I found those rather easy, except for the last... simply quickly look->match anything, and because there are no special tokens (bells, bad ones) everything is "colour" and chain reactions will follow often enough. There is no turn limit and it's really not very hard - unless you have some trouble "physically" seeing the matches - in that case I'd indeed not recommend the game for you. But calling it "unplayable" is simply wrong, because for most people it isn't.

Tbh, whatever problem you have with the game, please stop claiming this. Numerous people here (me included) have stated they have completed the game without any problem - the issue is with you, not the game.

Is the game color-blind friendly? In other words, are the different pieces distinguished in a manner other than color?

(Thar's one issue that some match-3 puzzle games have. Dr. Mario, excluding the Game Boy version, has this issue for some (I was someone playing a SNES version patched to use the GB pill graphics). Columns and Tetris Attack are better in this regard, as the pieces either are different shapes (Columns) or have different shapes on them (Tetris Attack). There's a Bomberman-themed falling block game that has this issue on all the platforms it was released on except the Virtual Boy (which has its own set of issues).)

In this form all the puzzle pieces are round with different symbols on them: https://www.hxchector.com/wp-content/uploads/huniepop-guide-puzzle8.jpg

I don't know how much trouble a colour-blind person would have to tell them apart quickly. It probably depends.

Googling it:
There is a mod for colour-blind people available here: https://steamcommunity.com/app/339800/discussions/0/610573009256360427/ which, according to the comments, is rather helpful, especially for the sex-date-speed-puzzles.