Continued from https://psteamcommunity.yuanyoumao.com/discussions/forum/10/3817410454867754317/?tscn=1764647385 - which was closed due to a recent post - which was not linked to and I can't find any evidence of - and this feature still doesn't exist. If there is a legitimate answer to this need and Valve wants to close this again - please actually LINK the post you're mentioning that resolves this so that interested parties can do whats necessary.

The current friends feature in steam mandates that you always share what game you're playing to all friends in the chat feature if you want to appear online. There is a privacy setting "Game Details", that disables this for chat, but ALSO hides all games on your account and breaks compatibility with third party game and achievement tracking platforms such as steamhunters, infinitebacklog, or steam calculator.

So if a user wants to, say, play an adult game, but NOT advertise it to everyone on their friends list (which may include minors), then the user has to

* Remember to log out of steam friends before staring said game
* Remember to disable the permission for showing what games they own
* Cannot use any third-party websites that need a way to list games on your account.

It would be great to have one or two nuanced options here, such as

* Never share my currently played game
* Never share games tagged 'adult'