

I checked, and the stuff about modding is true (you can read the EULA directly on the Steam Store page), however the Skyrim Anniversary EULA says you can only use editors or tools by Bethesda or Zenimax to make mods (if I read that correctly). I don’t think anyone really cares in Skyrim, and I don’t think anybody will care with Oblivion
Not anymore. You can buy the non-german Wolfenstein games for a while now (since 2019).
I think I remember that around the release of This War of Mine and Wolfenstein 2, there were some more discussions about just flat out banning Nazi symbols in video games, and treating them as art.
Porn and Hentai games are still pretty much all blocked on Steam, and some gory stuff, which I don’t get. You can’t buy Dying Light (but you can buy the DLC) on Steam or GOG, but Doom, where you’re ripping apart demons, is ok.