FBI investigates Steam games with hidden malware

Download any dubious games from Steam over the past few years? You very well could've downloaded malware onto your computer — and now FBI wants to know about it.

The Federal Bureau of Investigation's Seattle division is currently seeking out potential victims of games sold on Steam with hidden malware. The agency has set up a form that gamers can fill out here.

According to the agency, threat actors targeted Steam users between May 2024 and January 2026. The FBI has already identified a number of Steam games that turned out to have malware embedded: BlockBlasters, Chemia, Dashverse/DashFPS, Lampy, Lunara, PirateFi, and Tokenova.

The FBI's form asks for some basic information from anyone who thinks they've been targeted: their Steam username, what games they downloaded, and when.

The next questions allude to what the threat actors were doing once the malware was installed on a target's computer. Did someone contact you about downloading the game, or reached out unsolicited after the game was downloaded?

The FBI also wants to know if potential victims suffered any losses — whether in their bank accounts, their cryptocurrency stashes, their Steam inventory items, or other digital accounts.

The games infected with malware included shooters and platformers. Some were early releases, some pre-existing games — which were fine until an update included the malware.

Once the malware was on a target's computer, its programmers could steal a user's information or ruin their computer's functionality. The infected games were removed from the Steam platform as soon as they were discovered to contain malware.

While many of the games weren't very popular, at least one title, BlockBlasters, was reportedly responsible for $150,000 in crypto being stolen from a user's infected computer.