itch.io

It is the tampermonkey script on the bottom of the page. Yeah, I should rework the page sometime.

You need a browser extension that can run tampermonkey scripts and import the script there. Then you configure the script to your liking.

The defaults are keys 1-0 and you need to press key 1-4 while above a game thumbnail in browse or search view.  This adds/removes the item/developer to list 1 or to list 2 respectivly. The "on" state for both lists is to hide the item. And the "off" state, which is also used in your library, puts a colored outline around the item. 5 toggles between on and off. If you want to combine lists or do one time searches, you can export lists, clear the lists, do the special stuff, clear again, and re-import the old lists.

The basic use case would be to put all your library/known games on one list and all your ignore stuff on the other list.

// configuration start
const l1on = '{display:none}';
const l2on = '{display:none}';
const l1off = '{outline:auto blanchedalmond}';
const l2off = '{outline:auto purple}';
const key1 = '1';
const key2 = '2';
const dev1 = '3';
const dev2 = '4';
const togglek = '5';
const export_l1 = '6';
const export_l2 = '7';
const import_l1 = '8';
const import_l2 = '9';
const deleteallkey = '0';
// configuration end