How do I get 18+ games on Steam?
At last, you can finally enjoy all your naughty games in total peace. All you have to do is right click -> manage -> mark as private in your Steam Library. Either in the games list, or on the bigger box-art pictures in the main part of your library. You can do the same on Steam Deck if you're in the beta.
How do I hide 18+ games from friends on Steam?
Steam permits them, but hides them by default. Most retailers refuse to stock them, and the popular video game live streaming service Twitch forbids streaming them.
Does Steam allow a rated games?
Steam is not intended for children under 13 and Valve will not knowingly collect personal information from children under the age of 13.