The forums of popular game development company Epic Games have been hacked, and the users' username, email address, password and date of birth have likely been compromised.
You wouldn't know it, at first glance, because the company didn't share this information on the forums website, which just says: "We're performing some Epic maintenance tasks. Everything will be back shortly!"
But the company has sent out breach notification emails to registered users, explaining that when the forums are back online, users will be required to change their passwords because the company will reset them all.
It's also possible that any of information stored or sent by the users via the forums (private messages to other users, for example) has been compromised, the email says.