On November 15th, games without an age rating will disappear from the German Steam Store.
I'm not sure if mods like EIR are included, but it would be a shame. In any case, COH from 2006 has no age rating in the Steam Store!
For COH 2, an age indicator is displayed.
https://www.heise.de/news/Steam-Warum-einige-der-besten-Indie-Spiele-bald-ausgeblendet-werden-9960615.htmlAt the moment I'm not playing any PC games anymore for health reasons but I hope to be able to again soon....