For NSFW you can uncheck from your user settings:
After doing that, use this link to remove horror games: https://itch.io/games?exclude=tg.horror
Unfortunately "?exclude=" does not seem to work with multiple tags, but that may be enough to get rid of the two most common types of games in here from your search (I do that myself too).
Someone on Reddit found a way to include multiple exclusions. For example:
https://itch.io/search?q=Train?exclude[]=tg.horror&exclude[]=tg.adult
EDIT
Finally home from work so I could do a little research. Back in 2017, Leafo implemented a quick fix in response to the post Can I use exclusion filters?. This fix allows users to exclude one tag from the browse page. There is no way to exclude multiple tags.
I also looked into how to exclude tags in Search. I'm no web developer, but from what I can tell you can't exclude tags from your search results. The website just isn't designed to do that.
So https://itch.io/games?exclude=tg.horror will hide all games tagged as "horror, but https://itch.io/search?q=game&exclude=tg.horror will not.
It does not work for me either.
https://itch.io/search?q=Train?exclude[]=tg.horror&exclude[]=tg.adult
and
https://itch.io/search?q=Train?exclude[]=tg.horror
They show exactly the same games, and in both cases there are games with the adult tag in the result.
That person just claimed it works. It does not. The implementation would have to treat exclude like an array and loop through it's elements. It does not, as you cannot even do a single element exclusion with []=.
Also, that exclude thing does not seem to work, if not logged in. Would explain the complains I see sometimes, that it does not work. Single tag exclusion does work. But not in search. Search does not even limit itself to games or assets, you cannot specify what to search. That might change in the future, as the whole search system will get an overhaul. Maybe they even implement official tag exclusion, maybe even multiple tag exclusion.
