An X from SteamDB shares an email from Valve warning about a game called PirateFi that was pulled from Steam a couple of days ago, shortly after its release. Word is it is suspected that the free-to-play game included malware, which prompted its removal. This warns players who tried it before this was discovered they may be infected:

We are contacting you because you recently launched PirateFi (3476470) on Steam. The Steam account of the developer for this game uploaded builds to Steam that contained suspected malware.

You played PirateFi (3476470) on Steam while these builds were active, so it is likely that these malicious files launched on your computer.

The builds containing the suspected malware have been removed from Steam, but we strongly encourage you to run a full-system scan using an anti-virus product that you trust or use regularly, and inspect your system for unexpected or newly installed software. You may also consider fully reformatting your operating system to ensure that no malicious software remains on your machine.

Please contact Steam Support with any further questions.