Transfering Ignore List to Steam?

ohhh......I'll have to look into that. I have ESGST but there are far too many functions for me to know about all of them!
Thanks for the info

Some years ago I did a script generator to mass-add appids to Steam wishlist or ignore-list http://theemu.freecluster.eu/steam_wishlist_ignore_adder.html

The scripts seem to still work. If Steam limits the adding like they do with adding free games https://steamdb.info/freepackages/ then you can only add 50 per hour nowadays.

Here are the base adding-scripts if you rather add the appids into the code manually

Steam ignoredApps add

(function(){var appid_list=[ADD_COMMA_SEPARATED_APPID_LIST_HERE];var i=0,loaded=0,appid=0,total=appid_list.length,modal=ShowBlockingWaitDialog( 'Executing…', 'Please wait until all requests finish. Ignore all the errors, let it finish.' );for(;i<total;i++){appid=appid_list[i];$J.post('//store.steampowered.com/recommended/ignorerecommendation',{action: '',sessionid:g_sessionID,appid:appid}).always(function(){loaded++;modal.Dismiss();if(loaded>=total){return;}else{modal=ShowBlockingWaitDialog( 'Executing…','Added <b>'+loaded+'</b>/'+total+'.');}});}}());

Steam wishlist add

(function(){var appid_list=[ADD_COMMA_SEPARATED_APPID_LIST_HERE];var i=0,total=appid_list.length;loaded=0;appid=0;modal=ShowBlockingWaitDialog( 'Executing…', 'Please wait until all requests finish. Ignore all the errors, let it finish.' );for(;i<total;i++){appid=appid_list[i];$J.post('//store.steampowered.com/api/addtowishlist',{sessionid:g_sessionID,appid:appid}).always(function(){loaded++;modal.Dismiss();if(loaded>=total){return;}else{modal=ShowBlockingWaitDialog( 'Executing…','Added <b>'+loaded+'</b>/'+total+'.');}});}}());

There's no direct feature for it. At least I haven't found one but you can use multi-manager and endless scrolling. Activate both, activate games in multi-manager, go to your sg filters page, load some pages with endless scrolling (I wouldn't do all at once if you have many hidden games), select all games in multi-manager, click on export to links or if you want you can use custom format. Everything will be added as text to the box. Just click copy and you have everything as text in your clipboard.