If you've recently received any one-time password text messages that you did not request, ignore them and change your password again. In the coming weeks, keep an eye out for any phishing attempts disguised as game product offers or other Steam-related content.

It had been suggested that Twilio might have been the source of the hack, and the company does provide one-time passcode services – yet Twilio denied that it had been breached.

Valve has responded to reports of a major data breach in which Underdark.ai, a cyber threat intelligent service, highlighted a dark web forum post by a hacker claiming to be in possession of 89 million Steam user records.