Filter list question

I don't know if it's possible to do that in steam but you can use this website. No login required.

https://www.lorenzostanco.com/lab/steam/

Just to be clear you are talking about https://www.steamgifts.com/account/settings/giveaways/filters?
On SG itself there's Sort / Search Filtered Games. But nothing to search for tags. With ESGST you should be able to show tags and filter by them but it's not practical for that many filtered games. Maybe you can use JSON Support and figure something out.

You cannot search by genre or tag anywhere on SG. The site linked above "lorenzostanco" will allow you to search your library of games on Steam with tons of options like that, but not games here.

If you want to search through your list of hidden games on SG, you can use the same filters that work here for the regular giveaways, but only certain ones will work because many pertain specifically to giveaways like, number of entries, copies, or region restricted GA.

There is a list of search parameters that you can add to the URL here.. Open your hidden games list. Then add "/search?" to the end of the URL with one of the search parameters that you want. You can add multiple parameters by putting an & symbol between them.

For example, this will only show you DLC that costs at least 10 points to enter:
https://www.steamgifts.com/account/settings/giveaways/filters/search?dlc=true&point_min=10

Edit: I didn't realize that at46 commented above with a link to the search parameters and that there was a page created specifically for the ones that work on the filtered games page.