Like many people here, I love GoG, but I do already own a number of games on the GoG inventory and there are some that I just will never be interested in. It would be nice to have a feature that allows us to mark a game as "already owned" or "not interested" so it doesn't show up while we're shopping.

Marketing wise, this would also help since with less noise, we are more likely to find a game that we do want to buy.

There is an option to hide the games you own, near the top.

Well, if you already own it, it's greyed out in the catalogue. As for being able to ignore them... that'll never happen, GOG, or anyone else for that matter, would never choose to let you ignore any part of their catalogue in case there's a chance in the future that you might change your mind. Lol.. I've never seen this.

It's small and blends in with the background, they should make it stick out.

No, I mean games that I already own from somewhere else. Obviously, I don't have this problem with games I bought from GoG.