https://www.bleepingcomputer.com/news/security/steam-game-mo...
"Downfall, a fan expansion for the popular Slay the Spire indie strategy game, was breached on Christmas Day to push Epsilon information stealer malware using the Steam update system.
Once installed on a compromised computer, the malware will collect cookies and saved passwords and credit cards from web browsers (Google Chrome, Yandex, Microsoft Edge, Mozilla Firefox, Brave, Vivaldi), as well as Steam and Discord info.
It will also look for documents containing 'password' in the filenames and for more credentials, including the local Windows login and Telegram."