Players who downloaded PirateFi on Steam thought they were getting a seaside adventure. In reality, they downloaded a game packed with malware.

This sort of thing is atypical for Steam. The automated systems for game updates can sometimes crash PCs when the updates are problematic, but so far Valve has done a very good job of keeping actual malware out of the Steam store. (Can’t say the same for Apple, Google, or Microsoft .)

Valve is warning users to check for malware or reset their PC PirateFi was taken off Steam just days after it launched Other games are also being infected with malware Valve has started to contact suspected victims that they may have been the subject of a cyberattack just days after removing PirateFi from Steam after discovering it contained suspected malware files.

Valve removed a game from its Steam video game platform and store because it contained malware, according to media reports. In its notice to users who downloaded the game, Valve said affected users may want to “consider fully reformatting your operating system.”

A harmful game called PirateFi appeared on Steam for about a week but ended up causing some users malware infections. Unfortunately, there were users who played that may have gotten malware. Steam took down this free beta game once reports about hacked accounts came in,