Sergiu Gatlan reports:
As reported by Troy Hunt’s Have I Been Pwned breach notification service, the Facepunch game studio was the victim of a data breach in June 2016 which led to sensitive information of 396,650 users being exposed.
[…]
Furthermore, the Facepunch studio said they knew about the security breach and that all people involved in it were notified after the June 2016 data theft incident.
Despite that, according to a thread on the company’s forum, some users say that they did not receive any e-mail notification from Facepunch after their information was leaked.
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