Just in case you play TF2 or CSGO
The source code for both was leaked accidentally by the guy from Valve News Network
And people can do bad things with it to your PC while playing
Best wait for an official response from Valve
They can potentially download malicious material while you are playing.
Which then can attack your PC directly
The API has apparently also been leaked.
As a precaution set your steam to private.
Stay Safe

https://twitter.com/SteamDB/status/1252961862058205184?s=19

https://www.reddit.com/r/tf2/comments/g610dc/source_code_to_csgo_and_tf2_torrent_is_now_on/